Thesis (MScEng)--University of Stellenbosch, 2004. / ENGLISH ABSTRACT: Up to this point in time research on the South African solar chimney, proposed for a site in the Northern Cape, comprised of determining the structural integrity of the chimney structure, as well as airflow calculation, finding the optimal shape for the airflow channels. Not much work had been done on the realisation of the foundation of the global structure, i.e. how the cardinal parts are optimized in an integrated system. The inlet guide vanes (IGV's) should be central in such research efforts, being the main support of gravitational and lateral wind load on the chimney structure, as well as its important role in channelling air and creating pre-swirl of the airflow onto the turbine blades. However, little detailed research - research to actually determine and fix the many variables of the IGV's and integration with surrounding parts - had been performed! In this thesis as many of these variables as possible are investigated - ranging from structural integrity with regard to compressive and shear strength through optimizing structure eigenfrequency to economic feasibility. The outcome of this study is conceptual solutions regarding the geometry of the IGV structures in order for it to support the chimney while minimizing material volume. Finite element methods are used to create insight into the behaviour of the IGV's and force transferring structures, incorporating external factors such as lateral wind and gravitational loadsto determine the optimal shape of these structures. This study is valuable for researchers on the solar chimney, serving as a reference from where to design and secure the variables of the global structure, and eventually building the solar chimney. Keywords: Solar chimney, inlet guide vanes, solar power, massive concrete structures, structural realisation, finite element application, structure optimisation. / AFRIKAANSE OPSOMMING: Tot op hede het die navorsing op die Suid Afrikaanse sonskoorsteen, wat beplan word vir konstruksie in die Noordkaap, bestaan uit die bepaling van die integriteit van die struktuur asook lugvloei berekeninge om die optimale vorm van die lugvloei kanale te lewer. Min werk is gedoen om die fondasies van die globale struktuur, dus hoe die kardinale dele geïntegreer is in die gesamentlike sisteem, te ondersoek. Die inlaat lei lemme behoort sentraal te lê in sulke navorsingspogings aangesien dit die hoof ondersteuner en verspreider van gravitasie en laterale windlaste op die skoorsteen struktuur is. Dit speelook 'n integrale rol in die kanalisering van invloeiende lug om dit vooraf 'n vorteks beweging te gee vir 'n optimale invalshoek op die turbine lemme. Min gedetaileerde navorsing - navorsing om die verskeie onbekende faktore rondom die inlaat lei lemme en die omliggende strukture te bepaal - is tot op hede gedoen. Hierdie tesis mik om soveel moontlik van hierdie veranderlikes - wat reik van struktuur integriteit met betrekking tot die samedrukkings- en skuifsterktes in die materiaal tot die eie-frekwensies en ekonomiese vatbaarheid van die struktuur - vas te stel. Die uitkoms van hierdie studie is konseptueie oplossings vir die geometrie van die inlaat lei lem strukture wat terselfdertyd die totale struktuur se materiaal volume minimiseer. Eindige element metodes word gebruik om insig in die gedrag van die inlaat lei lemme en ander strukture wat krag oordra, te genereer. Die metodes inkorporeer soveel as moontlik van die eksterne faktore soos gravitasie en laterale windlas om die optimale geometrie vir die betrokke struktuur te bepaal. Hierdie studie is waardevol vir navorsers oor die sonskoorsteen en dien as 'n bron waaruit verdere ontwerp en die vasstel van veranderlikes in die globale struktuur gedoen kan word met die oog op die uiteindelike daarstelling van 'n sonskoorsteen.

Effective team working across disciplines is essential to solve the technological and managerial problems associated with construction projects. However, while it is widely accepted that this method of working is critical to the achievement organisational goals, it is a poorly understood process. Generic best practice recipes on how to improve team work in collaborative projects appears to have had limited impact on performance. Unless the realities of implementing and managing such joint endeavours are conceptualised and articulated in a manner that reflects the actual processes and patterns of behaviour, multi-disciplinary team working will remain a poorly understood working model. The goal of this work was to develop a conceptual framework that visualises the real success factors of multi-disciplinary working so that practitioners can apply a new understanding of predictable processes and patterns of behaviours to improve collaborative project outcomes. To achieve this, the project started with an exploration of critical success factors in multi-disciplinary design projects, encompassing extensive interviewing, workshops and a survey followed by a grounded theory (GT) study of collaborative working in six multi-disciplinary design projects. The switch to GT methodology offered possibilities to further probe into the dynamics of multi-disciplinary team working from the perspective of the team members. The findings show that team working in multi-disciplinary design projects can be explained through the social process of informalising. Informalising refers to the strategies practitioners use to cope with the multiple pressures and unforeseen demands that pervade the collaborative design environments. It portrays the relevance of managing of expectations and value-judging to remain effective and efficient in the face of change and uncertainty. These are critical factors that influence the project trajectory and experience of those involved. Alongside these results the work also demonstrates the importance of so called super soft factors such as shared values, creativity and innovation and passion and enthusiasm to achieve positive project outcomes. Overall, recognising that the process of informalising forms an essential part of cultivating collaboration, and hence getting the work done, more attention should be given to understand such activity in today s turbulent and transient project organisations. Knowledge and understanding of this form of emergent and improvisational strategy may enable managers to predict and control patterns of behaviour inherent in the management of collaborative design projects, and positively influence project outcomes in terms of perceived value and profit.

Tilt-up construction basically involves job-site prefabrication of concrete building members under controlled and relatively economical conditions. This master’s report presents tilt-up design procedures, along with construction procedures and planning at the job-site, erection, finishing and architectural treatments. It is intended to bring together the five steps of design, planning, construction, erection, and finishing which are crucial to a successful tilt-up project. / text

Continuously increasing demand for faster project delivery of emergency and non-emergency projects, project complexity, and pandemic caused price escalations and material shortages requiring real time pricing and use of available equipment are showing that construction industry needs to shift toward creating designs that will be driven by the construction process or construction-driven designs. The construction-driven designs enable faster than fast project delivery or flash tracking by adopting the mindset that construction is the last phase of the design and by integrating the building approach with the design where the means and methods of construction drive the design development process. However, the development of such designs requires the involvement of the key stakeholders such as contractor, major subcontractors and equipment vendors, and operations and maintenance personnel at the appropriate time in the design. This research presents the framework which addresses the key areas needed to develop construction-driven designs such as (1) formalizing the construction-driven design definition; (2) determining construction-driven design characteristics and the preferred level and timing of involvement of the key stakeholders (contractor, major subcontractor, major equipment vendor, and operations and maintenance personnel) in the design development process; (3) determining key stakeholder’s (contractor, designer, and owner) experience requirements for the successful development and execution of construction-driven designs; (4) identifying potential contractual, licensure, and insurance barriers that can affect contractor’s early involvement in the design and providing recommendations to overcome those barriers; (5) ranking project delivery methods based on their effectiveness and suitability to develop and implement construction-driven designs; (6) identifying and ranking the best practices specific to construction-driven designs; and (7) providing a tool that will allow a company or a project team to measure their readiness to develop a construction-driven design for a project. / Ph.D. / Continuously increasing demand for faster project delivery of emergency and non-emergency projects, project complexity, and rising prices and material shortages caused by pandemic require real time pricing and use of available equipment. Moreover, these issues are showing that construction industry needs to shift toward creating designs that are constructible and led by the means and methods of construction or construction-driven designs. The construction-driven designs enable faster than fast project delivery by adopting the mindset that construction is the last phase of the design and by integrating the building approach with the design process where the means and methods of construction influence and guide the design development process. However, the development of such designs requires the involvement of the key stakeholders such as contractor, major subcontractors and equipment vendors, and operations and maintenance personnel at the appropriate time in the design. This research presents the framework which addresses the key areas needed to develop construction-driven designs such as (1) formalizing the construction-driven design definition; (2) determining construction-driven design characteristics and the preferred level and timing of involvement of the key stakeholders (contractor, major subcontractor, major equipment vendor, and operations and maintenance personnel) in the design development process; (3) determining key stakeholder’s (contractor, designer, and owner) experience requirements for the successful development and execution of construction-driven designs; (4) identifying potential contractual, licensure, and insurance barriers that can affect contractor’s early involvement in the design and providing recommendations to overcome those barriers; (5) ranking project delivery methods based on their effectiveness and suitability to develop and implement construction-driven designs; (6) identifying and ranking the best practices specific to construction-driven designs; and (7) providing a tool that will allow a company or a project team to measure their readiness to develop a construction-driven design for a project.

Thesis (MEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: The ability of concentrating solar power (CSP) to efficiently store large amounts of energy sets it apart from other renewable energy technologies. However, cost reduction and improved efficiency is required for it to become more economically viable. Significant cost reduction opportunities exist, especially for central receiver system (CRS) technology where the heliostat field makes up 40 to 50 per cent of the total capital expenditure. CRS plants use heliostats to reflect sunlight onto a central receiver. Heliostats with high tracking accuracy are required to realize high solar concentration ratios. This enables high working temperatures for efficient energy conversion. Tracking errors occur mainly due to heliostat manufacturing-, installation- and alignment tolerances, but high tolerance requirements generally increase cost. A way is therefore needed to improve tracking accuracy without increasing tolerance requirements. The primary objective of this project is to develop a heliostat field control system within the context of a 5MWe CRS pilot plant. The control system has to govern the tracking movement of all heliostats in the field and minimize errors over time. A geometric model was developed to characterize four deterministic sources of heliostat tracking errors. A prototype system comprising 18 heliostats was constructed to function as a scaled down subsection of the pilot plant heliostat field and to validate the chosen control method and system architecture. Periodic measurements of individual heliostats’ tracking offsets were obtained using a camera and optical calibration target combined with image processing techniques. Mathematical optimization was used to estimate model coefficients to best fit the measured error offsets. Real-time tracking error corrections were performed by each heliostat’s local controller unit to compensate for a combination of error sources. Experimental tracking measurements were performed using the prototype system. Daily open-loop RMS tracking errors below one milliradian were obtained, thereby satisfying the project’s primary objective. The thesis concludes that high tracking accuracy can be achieved using the control method proposed here. This could potentially lead to a reduction in heliostat cost, thereby lowering the levelised cost of electricity for CRS plants. / AFRIKAANSE OPSOMMING: Gekonsentreerde sonkrag se vermoë om groot hoeveelhede energie effektief te stoor onderskei dit van ander hernubare energie tegnologieë. Kostebesparing en hoër effektiwiteit word egter vereis om dit ekonomies meer lewensvatbaar te maak. Beduidende kostebesparingsgeleenthede bestaan wel, spesifiek vir tegnologieë vir sentraal-ontvangerstelsels (central receiver system (CRS)) waar die heliostaatveld 40 tot 50 persent van die totale kapitaalbestedings uitmaak. CRS aanlegte gebruik heliostate om sonlig op ’n sentrale ontvanger te reflekteer. Heliostate met ’n hoë volgingsakkuraatheid word vereis om hoë sonkragkonsentrasieverhoudings te laat realiseer. Dit maak hoë werkstemperature moontlik vir effektiewe energie-omsetting. Volgingsfoute kom hoofsaaklik voor a.g.v. die heliostaat se vervaardigings-, installasie- en instellingstoleransies, maar hoë toleransie-vereistes verhoog gewoonlik die koste. Daar is dus ’n manier nodig om volgingsakkuraatheid te verbeter sonder om die toleransie-vereistes te verhoog. Die primêre doel van hierdie projek is om ’n heliostaat aanleg kontrole-stelsel te ontwikkel binne die konteks van ’n 5 MWe CRS toetsaanleg. Die kontrole-stelsel moet die volgingsbeweging van al die heliostate in die aanleg bestuur en ook met verloop van tyd volgingsfoute verminder. ’n Geometriese model is ontwikkel om die vier bepalende bronne van heliostaat volgingsfoute te karakteriseer. ’n Prototipe stelsel met 18 heliostate is gebou om as ’n funksionele skaalmodel van die toetsaanleg heliostaatveld te dien en om die gekose kontrole-metode en stelselargitektuur geldig te verklaar. Periodieke metings van die individuele heliostate se volgingsafwykings is verkry deur ’n kamera en optiese kalibrasie teiken te kombineer met beeldprosesseringstegnieke. Wiskundige optimering is gebruik om die model se koëffisiënte te skat om die beste passing te bepaal vir die gemete foutafwykings. Intydse volgingsfoutregstellings is deur elke heliostaat se plaaslike beheereenheid gedoen om te vergoed vir ’n kombinasie van foutbronne. Eksperimentele volgingsmetings is uitgevoer met die prototipestelsel. Daaglikse ooplus RMS volgingsfoute onder een milliradiaan is verkry, en sodoende is die projek se primêre doel behaal. Die tesis maak die gevolgtrekking dat hoë volgingsakkuraatheid behaal kan word deur die gebruik van die beheer-metode soos hier voorgestel. Dit kan potensieel bydra tot kostebesparing in die heliostaatveld van CRS aanlegte om sodoende die geykte koste van elektrisiteit te verminder.

Das Dresdner Brückenbausymposium fand 2024 zum mittlerweile 33. Mal statt. Mit einer konstant vierstelligen Teilnehmerzahl ist es die etablierteste Tagung rund um den Brückenbau in Deutschland. Die 13 Vorträge waren thematisch bei Neubau und Bestand, Rückbau, Historie und Richtlinienarbeit angesiedelt. Der Tagungsband enthält zudem vier Zusatzbeiträge.:Dirk Hilbert, Oberbürgermeister der Landeshauptstadt Dresden: Spannende Herausforderungen Dipl.-Ing. (FH) IWE Karsten Eins, Dipl.-Ing. Stefan Burgard, Franziska Ducklaus, M. A.: Ersatzneubau Strombrückenzug Magdeburg Prof. Dr.-Ing. Colin Caprani: Australian bridge loadings and bridge assessment strategies (Übersetzung: Dr.-Ing. Silke Scheerer: Brückenbelastungen und Strategien zur Brückenbewertung in Australien) Univ.-Prof. Dr.-Ing. Jürgen Feix, Dipl.-Ing. Christoph Waltl, Dipl.-Ing. Dr. Matthias Egger, Dipl.-Ing. Julian Konzilia, Dipl.-Ing. Jonas Wachter, Dipl.-Ing.(FH) Norbert Plattner: Großflächige Verstärkung einer Talbrücke mit Carbonbeton Dipl.-Ing. Tibor Sipos, Dipl. Bauing. ETH, Dr. sc. techn. Luc Trausch: Ersatz der Überführung Bederstrasse beim Bahnhof Enge in Zürich Prof. Dr.-Ing. Richard Stroetmann, Dipl.-Ing. Dipl.-Kffr. Sandra Christein, Dipl.-Ing. Steffen Oertel M. Sc., Dipl.-Ing. Alexander Fuchs M. Sc., Dipl.-Ing. Matthias Schönberg: Chemnitzer Viadukt – technische Instandsetzung und Verstärkung eines Denkmals Dipl.-Ing. Christian Rüters, Dipl.-Ing. (FH) Jörn Plate: Korrosionsschutz im Stahlbrückenbau – stehendes Wasser auf Beschichtungen Dipl.-Ing. Dr. techn. Franz Forstlechner: Anti-Aging-Maßnahmen für Eisenbahnbrücken aus Stahl Dr.-Ing. Gerhard Setzpfandt: Die Firma Liebold & Co. aus Langebrück bei Dresden und die Bau- und Nutzungsgeschichte der Syratalbrücke in Plauen Dipl.-Ing. Tobias Mansperger: Das Bauwerk 399c – innovativ und nachhaltig Dr. Joan Hee Roldsgaard, Dr. Claus Pedersen, Prof. Dr. Alan O‘Connor, M.Eng. Christian von Scholten, M.Eng. Alex Hansen: Leitfaden zur zuverlässigkeitsbasierten Bewertung bestehender Brücken – Beispiele aus der Praxis Prof. Dr.-Ing. Gero Marzahn, Dipl.-Ing. Andreas Jackmuth: Nibelungenbrücke Worms – digitale Erhaltung für mehr Nachhaltigkeit im Brückenbau Prof. Dr.-Ing. Dr.-Ing. E. h. Josef Hegger, Benjamin Camps, M.Sc.: Planungshilfe zur Umsetzung modularer Brückenbausysteme in Deutschland Dipl.-Ing. Matthias Münch, Dipl.-Ing. Michael Anschütz: Denkmalgerechte Instandsetzung der Müngstener Brücke – die Kaiser-Wilhelm-Brücke im Zuge der DB-Strecke Solingen–Remscheid über das Tal der Wupper Dipl.-Ing. Cedric Eisermann, Dipl.-Ing. Jenny Keßler, Max Herbers, M.Sc.: Brückenbauexkursion durch Norwegen – Bauwerke und eine Landschaft der Superlative 191 Fabian Graber, MSc Bauing. ETH/SIA, Dipl. Architekt FH: Hängebrücke am Seilnetz – der Himmelhausmattesteg im Emmental Daniel Krouhs M.Sc., Dr.-Ing. Martin Siffling, Jakub Bielski M.Sc.: Neckartalbrücke Horb – Erfahrungsbericht aus der parametrischen BIM-Ausführungsplanung Dipl.-Ing. (FH) Klaus Lanzinger, Prof. Dr.-Ing. Andreas Garg: Dauerhafte und nachhaltige Spannbetonbrücken – Kunststoffhüllrohre für interne Spannglieder

Thesis (MScEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: Concentrating solar power technology is a modern power generation technology in which central receiver systems play a significant role. For this technology a field of heliostats is used to reflect solar irradiation to the receiver located on top of the tower. An extensive review has shown that contemporary receiver designs face geometric complexities, lack of thermal efficiency as well as issues with durability and cost. The purpose of this study is to develop a new receiver concept that can potentially reduce these issues. A parametric analysis was used to identify potential means of improvement based on an energy balance approach including sensitivities involved with convection and radiation heat transfer. Design criteria such as the use of headers to minimize pressure drop was also investigated. Based on these findings the hybrid pressurized air receiver was developed which is a combination of tubular and volumetric receiver technologies. The fundamental idea of the receiver was investigated by simulating the ray-tracing and coupled natural convection and radiation heat transfer. The ray-tracing results have shown that the use of quartz glass is a prospective solution to higher allowable flux densities, but with reflection losses in the order of 7 %. The coupled natural convection heat transfer simulation further revealed that the receiver concept effectively eliminates the escape of buoyant plumes and radiative heat losses are minimized. Empirical data was gathered from a medium flux concentrator and good agreement with the numerical results was obtained. The thesis therefore concludes that the research outcomes were met. Ongoing research aims to optimise the receiver concept for a 5MW pilot plant. / AFRIKAANSE OPSOMMING: Gekonsentreerde sonkrag tegnologie is ’n moderne kragopwekkingstegnologie waar sentrale ontvangersisteme ’n beduidende rol speel. Vir hierdie tegnologie word ’n veld heliostate gebruik om sonstraling na die ontvanger wat aan die bopunt van die toring geleë is te reflekteer. ’n Omvattende hersiening het daarop gewys dat kontemporêre ontwerpe van die ontvangers ’n aantal geometriese kompleksiteite, ’n tekort aan termiese doeltreffendheid sowel as probleme in terme van duursaamheid en koste in die gesig staar. Die doel van die studie is om ’n nuwe ontvangerskonsep te ontwikkel wat moontlik hierdie probleme kan verminder. ’n Parametriese analise is gebruik om potensiële maniere van verbetering aan te dui wat gebaseer is op ’n energiebalans benadering; insluitend sensitiwiteite betrokke by konvektiewe en stralingswarmteoordrag. Ontwerpkriteria soos die gebruik van spruitstukke om drukverliese te minimaliseer is ook ondersoek. Gebaseer op hierdie bevindinge is die hibriede saamgepersde-lug ontvanger ontwikkel. Laasgenoemde is ’n kombinasie van buis- en volumetriese ontvangertegnologie. Die fundamentele idee van die ontvanger is ondersoek deur straalberekening asook die gelyktydige natuurlike konveksie en stralingswarmteoordrag te simuleer. Die straalberekeningsresultate het getoon dat die gebruik van kwarts glas ’n moontlike oplossing is om hoër stralingsintensiteit te bereik, maar met refleksieverliese in die orde van 7 %. Die gelyktydige natuurlike konveksie en stralingswarmteoordrag simulasie het verder aan die lig gebring dat die ontvangerkonsep die ontsnapping

Epiroc Rock Drills AB in Örebro manufactures and develops machinery for the infrastructure required to maintain a fully operational mining industry, such as ventilation, drilling rigs, trucks and loaders etc. In these environmentally conscious times, a large market focus forzero emission machines has begun to emerge. By replacing today'sinternal combustion engines, mining companies can save large sums of money in ventilation costs and fuel while creating a more pleasant working environment in the mines. Due to these rapidly changing needs, Epiroc's machines must also change in design and performance. Epiroc has thus chosen to use interchangeable batteries in their new generation of mining machines. When the battery is discharged, it must be easy to replace with a fullycharged one. From an economic point of view, it is also important that the machine is always in production without any stops, making fast and efficient battery switches desirable. At present, the battery change is usually done with a mono-rail crane down the mine. This has proved to be very difficult and ineffective as the battery is too often jammed into the machine due to the fact that the machine is poorly positioned against the crane. Ceiling heightis also a problem, preferably one should have about 6-7 meters to accomplish a safe lift with the crane, which is not always possible down in a mine. In order to find a more long-term solution to this problem, this degree project took its start. During the course of the process, a number of methods in product development and concept generation have been used to develop different concepts and screen them based on the needs identified at the beginning of the work. The main problem was divided into four sub problems to facilitate conceptgeneration, the most promising sub concepts were visualized using CAD and then put together in different combinations. These combinations were then evaluated against today's solution to easily see what concept should be further developed. This resulted in a concept that consists of a separate platform,which can either be placed on a vehicle or as a stand-alone station. On this platform there are two telescopic arms, one on each side. These arms lifts the three ton heavy battery from the mining machine in an arcuate motion over a charged battery on the platform, placing it in a designated location and then lifts the charged battery into the machine. With this concept, it is also possible to accomplish a safe change with a limited ceiling height of approximately 3.5-4 meters, which is an improvement compared to today's solution.

The demand for consultancy services has increased significantly since the companies began to shift from in-house staff to the purchasing of consulting services. The procurement of consul-tancy services can be considered among the most difficult service that goes to procure which means that it requires extensive knowledge of the purchaser to succeed in the process. In this report, I will examine how five public Swedish purchasers expressed their competence requirements regarding construction and design management ten years ago. I will also con-sider what type of skills they think are the most important today, and also see how the con-sultants' alleged expertise is examined. Finally, I will explain the five public purchasers thoughts on what might happen to their competence requirements in the nearest future. The report is structured in two parts where the first part is an analysis of the client's previous competence requirements. The second part consists of interviews with each individual client. The people that were interviewed all have extensive experience in project management, both from the private and public sectors. Conclusively, I will present what happened with their skills requirements over time and the likely reasons behind it, what forces that are behind changes in organizations, how the public purchasers follow up skill requirements and what they predict will happen to their skills requirements in the nearest future. / Efterfrågan på konsulttjänster har ökat avsevärt sedan många företag börjat köpa in dessa tjänster istället för att anställa egen personal. Att utnyttja konsulttjänster anses vara en av de svåraste tjänster som går att upphandla, vilket ställer krav på bred kompetens hos beställaren för att lyckas handla upp konsulter med rätt kompetens som matchar med projektens kom-plexitet. I den här rapporten undersöks hur fem svenska offentliga beställare uttryckte sin kompetens-kravsättning över bygg-och projekteringsledare tio år tillbaka i tiden. Det undersöks vilken typ av kompetens de riktar mest fokus på, samt hur konsulternas påstådda kompetens följs upp av de offentliga beställarna. Sammanfattningsvis kommer jag att redogöra för vad de fem offentliga beställarna tror kommer att hända med deras kompetenskrav inom den närmsta framtiden. I bakgrundskapitlet tillhandahålls en inblick i hur offentlig upphandling fungerar, där även konsulttjänsteupphandling och konsultföretagens affärsmodeller ser ut. Till grund för detta används faktorer bakom förändringar i organisationer, tillit mellan beställare och entre-prenör, hållbarhet i byggbranschen och outsourcing. Rapporten är uppbyggd i två delar, där ena delen utgörs av en analys av de offentliga bestäl-larnas tidigare kompetenskrav för åren 2005, 2010 och 2015. Den andra delen består av inter-vjuer med representanter från varje enskild beställare, samma fem beställare (Svenska bostä-der, Stockholms stad, Locum, Trafikverket och SL) som den tidigare delen baseras på. Perso-nerna som intervjuats har alla lång erfarenhet av projektledning, både från privat såväl som offentlig sektor. Slutligen presenteras hur kompetenskraven har utvecklats med tiden, tillsammans med tänk-bara faktorer som förklarar troliga anledningar till dess utveckling. Rapporten presenterar också vilka kompetenskrav som de offentliga beställarna ses som viktigast, hur de sköter granskningen av projektkonsulterna och vad de offentliga beställarna förutspår kommer att hända med sina kompetenskrav inom den närmsta framtiden.

Das Dresdner Brückenbausymposium fand 2023 zum mittlerweile 32. Mal statt. Mit einer konstant vierstelligen Teilnehmerzahl ist es die etablierteste Tagung rund um den Brückenbau in Deutschland. Die 13 Vorträge waren thematisch bei Neubau und Bestand, Rückbau, Historie und Richtlinienarbeit angesiedelt. Der Tagungsband enthält zudem drei Zusatzbeiträge.:Prof. Dr. Ursula M. Staudinger: Grußwort der Rektorin Prof. Dr.-Ing. Gero Marzahn: Überarbeitung der DIN 1076 – aktueller Sachstand Prof. Dr.-Ing. habil. Markus Oeser, Dr. Iris Hindersmann, M.Sc. Yasser Alqasem, M.Eng. Jennifer Bednorz, M.Sc. Sonja Nieborowski, M.Sc. Sarah Windmann: Vom digitalen Zwilling zum digitalen Asset-Management Dipl.-Ing. (TH) Lutz Günther: Die Erneuerung der X-Brücke in Zittau – eine verkehrliche Besonderheit unter den Brücken Sachsens Dr. Armand Fürst, dipl. Bauing. ETH: Erhalten oder ersetzen? Prof. Dr.-Ing. Dieter Ungermann, Peter Hatke M.Sc., Dipl.-Ing. (FH), SFI Peter Lebelt, Dr.-Ing. Susanne Friedrich: Wetterfester Baustahl im Stahl- und Verbundbrückenbau – die neue DASt-Richtlinie 007 Dr. Alfred Krill, Dipl.-Ing. Stephan Sonnabend: Fahrbahnplatten von Spannbetonkastenträgern – Nutzen einer Quervorspannung M. Sc. Felix Kaplan, Dipl. Ing. Kay Degenhardt, M. Sc. Martin Günther: Brückenerhaltung, eine Generationenaufgabe – Herausforderungen und Lösungsansätze aus Sicht des Landesbetriebs Straßenwesen Brandenburg Prof. Dipl.-Ing. Cengiz Dicleli: Herbert Schambeck (1927–2013) – Ein Großmeister des Brückenbaus o.Univ.Prof. Dr.-Ing. Johann Kollegger, Univ.-Ass. Dipl.-Ing. Franz Untermarzoner, Univ.-Ass. Dipl.-Ing. Michael Rath: LT-Brücke: Brückenbau mit dünnwandigen Fertigteilträgern und Fahrbahnplattenelementen Dr.-Ing. Gregor Schacht, Dr.-Ing. Alfred Krill, Dr.-Ing. Jan Lingemann: Rückbau – eine Notwendigkeit unserer Zeit. Anregungen für ein Regelwerk und Erfahrungen aus der Praxis Dipl.-Ing. Lukas Hüttig, Bernd Gericks M. Sc.: Einsatz modularer Brücken zum Wiederaufbau der Infrastruktur nach dem Jahrhunderthochwasser im Juli 2021 Michael Frey, David Hacker, Bernhard Möhrle: A96 Hochbrücke Memmingen – Durchgängiger BIM-Workflow von der Planung bis zur Bauausführung Dr. sc. techn. Hans Grassl, Jacqueline Donner M.Sc.: Mangfallbrücke Rosenheim – Realisierung einer seilverspannten Brücke im Seeton Dipl.-Ing. Enrico Baumgärtel, Max Herbers, M.Sc.: Auf den Spuren der alten Römer bis hin zu aktuellen Weltrekorden – Brückenbauexkursion 2022 Dr. Marc Zintel, Christian Linden, Prof. Dr. Ueli Angst: Probabilistische Lebensdauerbemessung von Stahlbetonbrücken über kostenlose Webanwendung Chronik des Brückenbaus (Zusammengestellt von Dipl.-Ing. (FH) Sabine Wellner)