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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Tělocvična - prefabrikovaný skelet / Gym – Precast concrete frame construction

Čihák, Tomáš January 2015 (has links)
This master thesis deals with a draft of precast concrete frame structure on the case of gymnasium building. The major part of this work are transversal and longitudinal frames, consisted of footings, columns, girders and precast floor slab. Other parts of the building are not solved. Thesis consists both static calculations and drawings.
12

DAfStb-Richtlinie „Betonbauteile mit Nichtmetallischer Bewehrung“: Von Forschung und Pilotprojekten zum Regelwerk

Will, Norbert 10 November 2022 (has links)
Der Einsatz von Betonbauteilen mit nichtmetallischer Bewehrung ist aktuell auf Pilotbauwerke beschränkt. Die Aufnahme der nichtmetallischen Bewehrung in den Annex R der Neufassung des Eurocode 2 zeigt aber deren steigende Bedeutung. Die für das Jahr 2022 geplante Veröffentlichung des Gelbdruckes der DAfStb-Richtlinie „Betonbauteile mit nichtmetallischer Bewehrung“ stellt einen wesentlichen Meilenstein dar, um die baupraktische Umsetzung für den Neubau zu erleichtern. Aus Forschungsprojekten ist über Pilotanwendungen mit vorhabenbezogenen Genehmigungen ein Regelwerk entstanden, das der Tragwerksplanung Vorgaben zur Bemessung und konstruktiven Durchbildung und den Herstellern Angaben zu den für die Anwendung der Richtlinie erforderlichen Kennwerten der Bewehrungen sowie Hinweise für die Bauausführung bereitstellt.
13

Anchorage in Concrete Structures : Numerical and Experimental Evaluations of Load-Carrying Capacity of Cast-in-Place Headed Anchors and Post-Installed Adhesive Anchors

Nilforoush, Rasoul January 2017 (has links)
Various anchorage systems including both cast-in-place and post-installed anchors have been developed for fastening both non-structural and structural components to concrete structures. The need for increased flexibility in the design of new structures and strengthening of existing concrete structures has led to increased use of various metallic anchors in practice. Although millions of fasteners are used each year in the construction industry around the world, knowledge of the fastening technology remains poor. In a sustainable society, buildings and structures must, from time to time, be adjusted to meet new demands. Loads on structures must, in general, be increased to comply with new demands, and the structural components and the structural connections must also be upgraded. From the structural connection point of view, the adequacy of the current fastenings for the intended increased load must be determined, and inadequate fastenings must either be replaced or upgraded. The current design models are generally believed to be conservative, although the extent of this behavior is not very clear. To address these issues, the current models must be refined to allow the design of new fastenings and also the assessment of current anchorage systems in practice. The research presented in this thesis consists of numerical and experimental studies of the load-carrying capacity of anchors in concrete structures. Two different types of anchors were studied: (I) cast-in-place headed anchors, and (II) post-installed adhesive anchors. This research focused particularly on the tensile load-carrying capacity of cast-in-place headed anchors and also on the sustained tension loading performance of post-installed adhesive anchors. The overall objective of this research was to provide knowledge for the development of improved methods of designing new fastening systems and assessing the current anchorage systems in practice. For the cast-in-place headed anchors (I), the influence of various parameters including the size of anchor head, thickness of concrete member, amount of orthogonal surface reinforcement, presence of concrete cracks, concrete compressive strength, and addition of steel fibers to concrete were studied. Among these parameters, the influence of the anchor head size, member thickness, surface reinforcement, and cracked concrete was initially evaluated via numerical analysis of headed anchors at various embedment depths. Although these parameters have considerable influence on the anchorage capacity and performance, this influence is not explicitly considered by the current design models. The numerical results showed that the tensile breakout capacity of headed anchors increases with increasing member thickness and/or increasing size of the anchor head or the use of orthogonal surface reinforcement. However, their capacity decreased considerably in cracked concrete. Based on the numerical results, the current theoretical model for the tensile breakout capacity of headed anchors was extended by incorporating several modification factors that take the influence of the investigated parameters into account. In addition, a supplementary experimental study was performed to verify the numerically obtained findings and the proposed refined model. The experimental results corresponded closely to the numerical results, both in terms of failure load and failure pattern, thereby confirming the validity of the proposed model. The validity of the model was further confirmed through experimental results reported in the literature. Additional experiments were performed to determine the influence of the concrete compressive strength and the addition of steel fiber to concrete on the anchorage capacity and performance. These experiments showed that the anchorage capacity and stiffness increase considerably with increasing concrete compressive strength, but the ductility of the anchor decreases. However, the anchorage capacity and ductility increased significantly with the addition of steel fibers to the concrete mixture. The test results also revealed that the tensile breakout capacity of headed anchors in steel fiber-reinforced concrete is significantly underestimated by the current design model. The long-term performance and creep behavior of the post-installed headed anchors (II) was evaluated from the results of long-time tests on adhesive anchors under sustained loads. In this experimental study, adhesive anchors of various sizes were subjected to various sustained load levels for up to 28 years. The anchors were also exposed to several in-service conditions including indoor temperature, variations in the outdoor temperature and humidity, wetness (i.e., water on the surface of concrete), and the presence of salt (setting accelerant) additives in the concrete. Among the tested in-service conditions, variations in the outdoor temperature and humidity had the most adverse effect on the long-term sustained loading performance of the anchors. Based on the test results, recommendations were proposed for maximum sustained load levels under various conditions. The anchors tested under indoor conditions could carry sustained loads of up to 47% of their mean ultimate short-term capacities. However, compared with these anchors, the anchors tested under outdoor conditions exhibited larger creep deformation and failure occurred at sustained loads higher than 23% of their mean ultimate short-term capacities. Salt additives in concrete and wet conditions had negligible influence on the long-term performance of the anchors, although the wet condition resulted in progressive corrosion of the steel. Based on the experimental results, the suitability of the current testing and approval provisions for qualifying adhesive anchors subjected to long-term sustained tensile loads was evaluated. The evaluations revealed that the current approval provisions are not necessarily reliable for qualifying adhesive anchors for long-term sustained loading applications. Recommendations were given for modifying the current provisions to ensure safe long-term performance of adhesive anchors under sustained loads.
14

Stavebně technologický projekt bytového domu v Brně - Slatině / Construction and technological project of apartment building in Brno - Slatina

Vojtek, Ondřej January 2018 (has links)
This diploma thesis deals with construction and technological project of apartment building in Brno – Slatina, Kigginsova street. Thesis focus on technological phase of monolithic rough superstructure and masonry work. For this phases were processed technogical specifications and controlling ad testing schedules. Within this thesis was also compiled technical report, solution of transport roads, technical report and drawings of site equipmet. For main object was compiled itemized budget, which was foundation for completing time schedule. In diploma thesis are further processed safety requirements and chosen construction details.
15

Porovnání návrhů monolitické konstrukce bez a se zohledněním postupu výstavby. / Comparision of design of cast-in-place structure with / without consideration of process construction

Vlach, Jakub January 2015 (has links)
The aim of this thesis is to propose and evaluate static three-storey reinforced concrete structure. For static analysis supporting structure was used computer program based on FEM SCIA - Engineer 2013 - student version. In computing program have been two independent computational models and in 2D and 3D space. The results were compared and evaluated with each other. On the basis of the report is drafted drawings consisting of reinforcement drawing and drawing shape.
16

Betonová konstrukce krytého parkoviště pro bytové domy / Concrete structure covered parking for apartment buildings

Vyhnalíková, Kateřina January 2016 (has links)
The aim of diploma thesis is a design and an assessment of selected structural elements of one floor in monolithic concrete structures serving as covered parking for an apartment house. Software RFEM is used here to calculate internal forces. The thesis also includes manual calculation of internal forces and comparison with software results. It also includes drawings of proposed solution. All calculation are done in accordance with Eurocode 2.
17

Založení výškové budovy / Foundation of tall buildings

Kubínek, Michal January 2017 (has links)
The diploma thesis describes design and assessment of foundation of tall building. Existing reinforced concrete slab-pile foundation structure was assessed as unsatisfactory at the ultimate limit state. Design of two new options was processed: slab-pile foundation with adjusted slab thickness and slab foundation without piles. Both options were assessed at the ultimate limit state and the serviceability limit state. Foundation options were designed as water-impermeable structure of white tank and meet requirements for this type of structures.
18

Výukový pavilon 2. LF Univerzity Karlovy v Praze – stavebně technologický projekt / Educational pavilion of the 2nd medical faculty of Charles university in Prague – vonstruction technology project

Paštika, Martin Unknown Date (has links)
The subject of this diploma thesis is technological preparation of educational pavilion 2.LF UK in Prague 5. The diploma thesis contains study of the main technological phases of the object, project of the site equipment, useful machines, time schedule, budget, technological prescription for reinforced concrete construction, project of the formwork for floor slab, control plan. The basis for technological preparation in this diploma thesis is design documentation.
19

Realizace bytového domu pro sociální bydlení ve Starči - stavebně technologický projekt / Implementation of Apartment House for Social Housing in Starec - Building Contruction Project

Bobek, Vojtěch Unknown Date (has links)
Master thesis focuses on complex conducting of the technological project with accented earthwork, laying foundations and ceiling construction. Apartment building consists of two floors and is based in complicated geotechnical conditions which require changing subsoil and laying a foundation slab. The main aim of this thesis is a proposal of technological notes, time and financial management, selection of machinery, transport to the building site, work safety regulations, quality check of the conducted work and construction organisation.

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