This degree project compares piling methods with respect to technical and economic aspects, all affecting factors are measured as realistic as possible. The aim was to get a better understanding for piling methods used in Sweden and to work as an information tool for structural engineers. In order to get the technical aspects on piling methods literature study and interviews with structural engineers from Kadesjös Ingenjörsbyrå AB have been conducted. The case study on a residential building in Västerås was also performed. In this case study calculations for a quantity of piling methods have been made and sent for RFQs for various entrepreneurs. Subsequently piling methods have been analyzed and compared with respect to their prices. By calculating the costs of various piling methods it has been analyzed why some piling methods are more expensive than others. In a layer from soil that is free from rocks and other obstacles the concrete pile is the economically effective piling method for a residential building for both five and thirty meters. The magnificent steel pile is only 5% more expensive than the concrete pile. Note that this degree project is not a cheat sheet for the most economical pile.

This study aimed to explore the knowledge, perceptions and skills of Foundation Phase English Second Language educators as determinants for developing a support programme for educators to improve their phonological awareness teaching skills. Phonological awareness skills are the most important precursor to reading skills, meaning that there is a strong correlation between phonological awareness and reading ability. However, research indicates that many educators do not have the necessary knowledge or skills to teach phonological awareness effectively. All Foundation Phase learners are compelled to have English as a First Additional Language from Grade 1 in order to prepare them for when English becomes the LoLT from Grade 4. It is therefore critical that all the language skills (including phonological awareness skills) necessary for learning are well established in the Foundation Phase. This qualitative study utilised a multiple case study with five ESL Foundation Phase (FP) educators in two rural schools in the Hartbeespoort area in the North West Province. These schools were quintile 1 government schools and all educators were employed by the Department of Basic Education. Data were collected in two phases. The first phase involved collecting data on educator knowledge, perceptions and teaching skills of phonological awareness, using open questionnaires, individual interviews, classroom observations and document analysis. Based on the findings of phase 1 a support programme was compiled to enhance the effective teaching and assessment of phonological awareness in ESL Foundation Phase classrooms. The second phase involved conducting a training workshop for the educators on phonological awareness and the support programme, to enable them to implement it in their classrooms after training. During implementation data were gathered via classroom observations and a focus group interview was conducted afterwards to determine the value of the support programme. The findings of this study revealed that, as a result of various factors, but especially because of FP educators’ own limited proficiency in English and inadequate training with regard to phonological awareness, they did not have sufficient knowledge and teaching skills to purposefully develop learners’ phonological awareness. After receiving focused and comprehensive training and follow-up in-service support, the FP educators seemed to gain an in depth understanding of phonological awareness, as well as improved skills in the teaching thereof. These findings were addressed in recommendations for the DBE and schools, emphasizing that pre-service, as well as in-service, educators need accurate training and constructive in-service support with regard to phonological awareness. This is essential in order to ensure that all learners learning English as a second language in the Foundation Phase, have developed sufficient phonological awareness skills to enable optimal learning in English as LoLT from Grade 4.

This study aimed to explore the knowledge, perceptions and skills of Foundation Phase English Second Language educators as determinants for developing a support programme for educators to improve their phonological awareness teaching skills. Phonological awareness skills are the most important precursor to reading skills, meaning that there is a strong correlation between phonological awareness and reading ability. However, research indicates that many educators do not have the necessary knowledge or skills to teach phonological awareness effectively. All Foundation Phase learners are compelled to have English as a First Additional Language from Grade 1 in order to prepare them for when English becomes the LoLT from Grade 4. It is therefore critical that all the language skills (including phonological awareness skills) necessary for learning are well established in the Foundation Phase. This qualitative study utilised a multiple case study with five ESL Foundation Phase (FP) educators in two rural schools in the Hartbeespoort area in the North West Province. These schools were quintile 1 government schools and all educators were employed by the Department of Basic Education. Data were collected in two phases. The first phase involved collecting data on educator knowledge, perceptions and teaching skills of phonological awareness, using open questionnaires, individual interviews, classroom observations and document analysis. Based on the findings of phase 1 a support programme was compiled to enhance the effective teaching and assessment of phonological awareness in ESL Foundation Phase classrooms. The second phase involved conducting a training workshop for the educators on phonological awareness and the support programme, to enable them to implement it in their classrooms after training. During implementation data were gathered via classroom observations and a focus group interview was conducted afterwards to determine the value of the support programme. The findings of this study revealed that, as a result of various factors, but especially because of FP educators’ own limited proficiency in English and inadequate training with regard to phonological awareness, they did not have sufficient knowledge and teaching skills to purposefully develop learners’ phonological awareness. After receiving focused and comprehensive training and follow-up in-service support, the FP educators seemed to gain an in depth understanding of phonological awareness, as well as improved skills in the teaching thereof. These findings were addressed in recommendations for the DBE and schools, emphasizing that pre-service, as well as in-service, educators need accurate training and constructive in-service support with regard to phonological awareness. This is essential in order to ensure that all learners learning English as a second language in the Foundation Phase, have developed sufficient phonological awareness skills to enable optimal learning in English as LoLT from Grade 4.

The creation of an effective construction schedule is fundamental to the successful completion of a construction project. Effectively communicating the temporal and spatial details of this schedule are vital, however current planning approaches often lead to multiple or misinterpretations of the schedule throughout the planning team. Four Dimensional Computer Aided Design (4D CAD) has emerged over the last twenty years as an effective tool during construction project planning. In recent years Building Information Modelling (BIM) has emerged as a valuable approach to construction informatics throughout the whole lifecycle of a building. Additionally, emerging trends in location-aware and wearable computing provide a future potential for untethered, contextual visualisation and data delivery away from the office. The purpose of this study was to develop a novel computer-based approach, to facilitate on-site 4D construction planning through interaction with a 3D construction model and corresponding building information data in outdoor Augmented Reality (AR). Based on a wide ranging literature review, a conceptual framework was put forward to represent software development requirements to support the sequencing of construction tasks in AR. Based on this framework, an approach was developed that represented the main processes required to plan a construction sequence using an onsite model based 4D methodology. Using this proposed approach, a prototype software tool was developed, 4DAR. The implemented tool facilitated the mapping of elements within an interactive 3D model with corresponding BIM data objects to provide an interface for two way communication with the underlying Industry Foundation Class (IFC) data model. Positioning data from RTK-GPS and an electronic compass enabled the geo-located 3D model to be registered in world coordinates and visualised using a head mounted display fitted with a ii forward facing video camera. The scheduling of construction tasks was achieved using a novel interactive technique that negated the need for a previous construction schedule to be input into the system. The resulting 4D simulation can be viewed at any time during the scheduling process, facilitating an iterative approach to project planning to be adopted. Furthermore, employing the IFC file as a central read/write repository for schedule data reduces the amount of disparate documentation and centralises the storage of schedule information, while improving communication and facilitating collaborative working practices within a project planning team. Post graduate students and construction professionals evaluated the implemented prototype tool to test its usefulness for construction planning requirements. It emerged from the evaluation sessions that the implemented tool had achieved the essential requirements highlighted in the conceptual framework and proposed approach. Furthermore, the evaluators expressed that the implemented software and proposed novel approach to construction planning had potential to assist with the planning process for both experienced and inexperienced construction planners. The following contributions to knowledge have been made by this study in the areas of 4D CAD, construction applications of augmented reality and Building Information Modelling; · 4D Construction Planning in Outdoor Augmented Reality (AR) · The development of a novel 4D planning approach through decomposition · The deployment of Industry Foundation Classes (IFC) in AR · Leveraging IFC files for centralised data management within real time planning and visualisation environment.

Previous earthquakes demonstrated destructive effects of soil-structure interaction on structural response. For example, in the 1970 Gediz earthquake in Turkey, part of a factory was demolished in a town 135 km from the epicentre, while no other buildings in the town were damaged. Subsequent investigations revealed that the fundamental period of vibration of the factory was approximately equal to that of the underlying soil. This alignment provided a resonance effect and led to collapse of the structure. Another dramatic example took place in Adapazari, during the 1999 Kocaeli earthquake where several foundations failed due to either bearing capacity exceedance or foundation uplifting, consequently, damaging the structure. Finally, the Christchurch 2012 earthquakes have shown that significant nonlinear action in the soil and soil-foundation interface can be expected due to high levels of seismic excitation and spectral acceleration. This nonlinearity, in turn, significantly influenced the response of the structure interacting with the soil-foundation underneath. Extensive research over more than 35 years has focused on the subject of seismic soil-structure interaction. However, since the response of soil-structure systems to seismic forces is extremely complex, burdened by uncertainties in system parameters and variability in ground motions, the role of soil-structure interaction on the structural response is still controversial. Conventional design procedures suggest that soil-structure interaction effects on the structural response can be conservatively ignored. However, more recent studies show that soil-structure interaction can be either beneficial or detrimental, depending on the soil-structure-earthquake scenarios considered. In view of the above mentioned issues, this research aims to utilise a comprehensive and systematic probabilistic methodology, as the most rational way, to quantify the effects of soil-structure interaction on the structural response considering both aleatory and epistemic uncertainties. The goal is achieved by examining the response of established rheological single-degree-of-freedom systems located on shallow-foundation and excited by ground motions with different spectral characteristics. In this regard, four main phases are followed. First, the effects of seismic soil-structure interaction on the response of structures with linear behaviour are investigated using a robust stochastic approach. Herein, the soil-foundation interface is modelled by an equivalent linear cone model. This phase is mainly considered to examine the influence of soil-structure interaction on the approach that has been adopted in the building codes for developing design spectrum and defining the seismic forces acting on the structure. Second, the effects of structural nonlinearity on the role of soil-structure interaction in modifying seismic structural response are studied. The same stochastic approach as phase 1 is followed, while three different types of structural force-deflection behaviour are examined. Third, a systematic fashion is carried out to look for any possible correlation between soil, structural, and system parameters and the degree of soil-structure interaction effects on the structural response. An attempt is made to identify the key parameters whose variation significantly affects the structural response. In addition, it is tried to define the critical range of variation of parameters of consequent. Finally, the impact of soil-foundation interface nonlinearity on the soil-structure interaction analysis is examined. In this regard, a newly developed macro-element covering both material and geometrical soil-foundation interface nonlinearity is implemented in a finite-element program Raumoko 3D. This model is then used in an extensive probabilistic simulation to compare the effects of linear and nonlinear soil-structure interaction on the structural response. This research is concluded by reviewing the current design guidelines incorporating soil-structure interaction effects in their design procedures. A discussion is then followed on the inadequacies of current procedures based on the outcomes of this study.

Seamless computer-based knowledge sharing between departments of a manufacturing enterprise is useful in preventing unnecessary design revisions. A lack of interoperability between independently developed knowledge bases, however, is a major impediment in the development of a seamless knowledge sharing system. Interoperability, being an ability to overcome semantic and syntactic differences during computer-based knowledge sharing can be enhanced through the use of ontologies. Ontologies in computer science terms are hierarchical structures of knowledge stored in a computer-based knowledge base. Ontologies have been accepted by all as an interoperable medium to provide a non-subjective way of storing and sharing knowledge across diverse domains. Some semantic and syntactic differences, however, still crop up when these ontological knowledge bases are developed independently. A case study in an aerospace components manufacturing company suggests that shape features of a component are perceived differently by the designing and manufacturing departments. These differences cause further misunderstanding and misinterpretation when computer-based knowledge sharing systems are used across the two domains. Foundation or core ontologies can be used to overcome these differences and to ensure a seamless sharing of knowledge. This is because these ontologies provide a common grounding for domain ontologies to be used by individual domains or department. This common grounding can be used by the mediation and knowledge verification systems to authenticate the meaning of knowledge understood across different domains. For this reason, this research proposes a knowledge verification framework for developing a system capable of verifying knowledge between those domain ontologies which are developed out of a common core or foundation ontology. This framework makes use of ontology logic to standardize the way concepts from a foundation and core-concepts ontology are used in domain ontologies and then by using the same principles the knowledge being shared is verified. The Knowledge Frame Language which is based on Common Logic is used for formalizing example ontologies. The ontology editor used for browsing and querying ontologies is the Integrated Ontology Development Environment (IODE) by Highfleet Inc. An ontological product modelling technique is also developed in this research, to test the proposed framework in the scenario of manufacturability analysis. The proposed framework is then validated through a Java API specially developed for this purpose. Real industrial examples experienced during the case study are used for validation.

Suction caissons are a new foundation option for offshore wind turbines. This thesis is focussed on the behaviour of suction caisson foundations in sand and in clay during installation, and under subsequent vertical and combined moment-lateral loadings. The research is based on extensive experimental work carried out using model scaled caissons. The analysis of the results allowed the determination of parameters for hyperplasticity models. Model caissons were vertically loaded in loose and dense sands to study in service states and plastic behaviour. Bearing capacity increased with the length of the caisson skirt. The bearing capacity formulation showed that the angle of friction mobilised was close to the critical state value for loose sands and close to those of peak values due to dilation for dense sands. The vertical load increased, though at a lower rate than during initial penetration, after large plastic displacements occurred. A hardening law formulation including this observed behaviour is suggested. In sand the installation of caissons by suction showed a drastic reduction in the net vertical load required to penetrate the caisson into the ground compared with that required to install caissons by pushing. This occurred due to the hydraulic gradients created by the suction. The theoretical formulations of the yield surface and flow rule were calibrated from the results of moment loading tests under low constant vertical loads. The fact that caissons exhibit moment capacity under tension loads was considered in the yield surface formulation. Results from symmetric and non symmetric cyclic moment loading tests showed that Masing’s rules were obeyed. Fully drained conditions, partially drained and undrained conditions were studied. Caisson rotation velocities scaled in the laboratory to represent those in the field induced undrained response for relevant periods of wave loading, a wide range of seabed permeabilities and prototype caisson dimensions. Under undrained conditions and low constant vertical loads the moment capacity of suction caissons was very small. Under partially drained conditions the moment capacity decreased with the increase of excess pore pressure. In clay, vertical cyclic loading around a mean vertical load of zero showed that in the short term the negative excess pore pressures generated during suction installation reduced vertical displacements. The yield surface and the flow rule were determined from moment swipe and constant vertical load tests. The moment capacity was found to depend on the ratio between the preload Vo and the ultimate bearing capacity Vu. Gapping response was observed during cyclic moment loading tests, but starting at smaller normalised rotations than in the field. The hysteresis loop shape obtained during gapping cannot be reproduced by means of the Masing’s rules.

Synthetic polymer fluids have been used as an alternative to conventional bentonite slurries for the excavation of foundation elements over the last two decades. Thus far their use has excited polarised views in the industry – some construction professionals avoid using them after hearing ‘horror stories’ about past failures whereas others believe that they are the future of support fluids because of the many benefits that they can offer. This situation has been found to be mainly due to a lack of understanding of what polymers really are and their properties. To address this issue, the various polymer products currently available in the market have been categorised based on their intended functions, and the fundamental properties of some of them have been characterised. The research showed that significant difference exists between polymers even of the same chemical family. Based on a series of rheological experiments, it was found that the properties of polymer fluids are highly dependent on the governing shear rate, time, and a range of site dependent factors. The research also showed that the current procedure for the interpretation of viscosity data is incorrect. After an analysis of the properties of currently available polymers, the latter part of the thesis describes a field trial carried out at a site in Stratford, East London. The aims of the trial were twofold: to compare the performance between piles constructed using bentonite and polymer fluids, and to assess the effect of extended pile bore open time for pile bores supported by polymers. From the results, it was found that the polymer piles showed much stiffer load–settlement response than the bentonite pile, and that a pile bore open time of up to 26 h had no adverse effect on the pile performance. The load test results have been carefully back-analysed using a range of methods. It was found that, compared to their bentonite counterparts, polymer fluids can improve the interface shearing resistance with Thanet Sand and the shear modulus of the Lambeth clay.

In the state of Florida one of the primary factors which influences design of structures is the effect of hurricane force winds on structures. These forces can be greater than any other force encountered throughout the lifetime of said structure. For this reason, designing a structure to resist such forces can greatly increase the cost and time required for completing construction projects. Traditionally, large concrete footings have been utilized to resist wind-induced uplift forces. These footings do little more than act as large reaction masses to weigh down the building. An alternative and little-used method for resisting these large uplift forces is the use of mini-pile anchors. Mini-pile anchors generate side shear at the interface between the pile and the soil which resists the uplift forces.This thesis provides an overview of the design methods used to estimate wind-induced uplift forces and several foundation options used to withstand these forces. More traditional/less complicated foundations are compared to the more sophisticated mini-pile method which makes more efficient use of construction materials. The cost efficiency of each method is evaluated which provides a guideline for where and when a given foundation option is appropriate.Finally, a case study where the new method was used is presented which documents the design and construction procedures.

The problem of this thesis is to determine the evolution of the architectural design of the Kimbell Art Museum building from its origin as a concept to its realization in the completed structure. This study has two objectives.The first is to discover the process by which the physical museum building cam into being. The second is to trace the conceptual evolution of the Kimbell Art Museum building. This problem has three parts, each of which has been made the subject of a chapter. The first, "Concept Development," sets forth the pre-design concepts of the founder, the director, and the architect. The second, "Design Development," establishes a chronological sequence of architectural design presentations. The third, the "Conclusion," compares the pre-design concepts to the finished building.