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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 62 for “"Concrete Slab"”.
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Efficiency of a fabric formed concrete slab
… this thesis suggests a new form of concrete slab and quantifies its efficiency in terms of material, carbon energy and cost savings compared to a traditional reinforced concrete flooring system. The proposed form of concrete slab is constructed using fabric formwork. It provides the …
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Modelling of reinforced concrete slab deflections at service loading
… loading is an important aspect of reinforced concrete slab design. Under-design can cause large deflections which can be expensive to repair, if at all possible. Over-design can lead to material wastage and unnecessary dead load. Deflection is inversely proportional to the effective moment of …
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Damage Detection Using Destructive Testing of a Reinforced Concrete Slab
Visual inspection is one of the primary tools for evaluating the health of bridges as more reach or exceed their intended lifespan. Bridge deterioration must be monitored to ensure continued safety, so owners need maintenance reports to decide on corrective actions. Strategic repair can offer asset …
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Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
… numerical simulation. The three methods employed slabs of foamed concrete and its modifications. The modifications of foamed concrete included foamed concrete substituting sand with Rice Husk Ash (RHA) and foamed concrete reinforced by Polypropylene fibre (PF). Experimental work produced …
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Strength and Behavior of Reinforced Concrete Slab-Column Connections Subjected to Static and Dynamic Loadings
Made available in DSpace on 2014-12-10T22:21:27Z (GMT). No. of bitstreams: 1 7114716.pdf: 15433902 bytes, checksum: 732b89ceb8fd2d083a6c493c4f30eea8 (MD5) Previous issue date: 1970
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Investigation of the Use of Viscoelastic Damping Devices to Rehabilitate a Lightly Reinforced Concrete Slab-Column Structure
Interpretations of the testing results are provided through the use of linear models of the type that might be used in the design office. The analytical models were used to assess strength, stiffness, and serviceability of the structure. In addition, the analytical models were used to assess the …
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The development of an alternate building system based on the use of an existing standardized component : precast, prestressed, hollow-core concrete slab
… question is a precast, prestressed, hollow-core concrete slab, extending its use from its current application in floor and roof decks to load - bearing wall panels. The system incorporates three additional structural members in order to perform autonomously: continuous prefabricated reinforced …
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Elastic-plastic finite element modeling of long span composite joists with incomplete interaction
… for the incomplete interaction between the concrete slab and the steel joist by modeling the nonlinear behavior of the steel shear connectors. Experimental tests on long span composite open-web steel joists were performed at Virginia Polytechnic Institute and State University. Measurements …
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Methods to improve the vibration characteristics of joist supported floor systems
… generated more efficient designs of steel joist-concrete slab floor systems. Though the structural integrity is rarely compromised, these floor systems are more susceptible to human-induced vibrations which may be annoying to the occupants of the structure. The purpose of this investigation was …
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The design of prestressed composite steel bridges
… of two new structural systems: prestressed concrete and composite design. Each of these new construction methods has advantages and limitations. A new idea of combining these two structural systems into one could result in more economical structures particularly suited for long span bridges. …
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Strength and Stiffness of Weak-Axis Moment End-Plate Connections
… with bare steel. One test included a composite concrete slab that confined the top extension of the end-plate. Finite element models of the tests were created with the commercial software SAP2000. A simplified modeling procedure was developed to overcome the contact problems between the …
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Moisture redistribution in screeded concrete slabs
… make the future relative humidity in a screeded concrete slab predictable. Residual moisture in screeded concrete slabs may redistribute to the top screed surface under semi-permeable flooring, thus elevating the relative humidity, RH, and possibly exceed the critical humidity level. Passing the …
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Progressive Collapse Assessment of Steel and Concrete Composite Structures Subjected to Extreme Loading Conditions
… focuses on the study of the behaviour of steel-concrete composite structures subjected to a column loss, and proposes a global overview to quantify the robustness of such systems subjected to this hazard scenario. The description of validated finite element models and of a new analytical tool to …
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Redistribution of moisture and ions in cement based materials
… make the future relative humidity in a screeded concrete slab predictable. The second objective was to develop a method to determine the critical humidity for ion transport in concrete. Residual moisture in screeded concrete slabs may be redistributed to the top screed surface under a …
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Finite element modelling of shear connection for steel-concrete composite girders
… shear connectors in composite girders with solid slabs and precast hollow core slabs. The finite element package ABAQUS was used to conduct the analysis. Push-off tests with both types of slabs were simulated taking into consideration all material nonlinearities of the components. The models are …
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Performance of short piled raft foundation system on peat soil under static load
… other previous methods (Chicken Claw and Nailed Slab). The main reason is that SPR has weight relatively lighter than others, caused by utilizing the uplift force to closed end pipe as pile and the thin concrete slab. While for loading test of full scale model of 3.0 m x 3.0 m concrete slab with …
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Analytical solutions for temperature profile prediction in multi-layered pavement systems
… the load transfer efficiency across joints in concrete pavements. To facilitate estimation of pavement temperature profiles, one-dimensional (1-D) analytical solutions for temperature profiles in multi-layered pavements have been derived using the method of separation of variables and the …
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Subsidence Cracking of Concrete Over Steel Reinforcement Bar in Bridge Decks
… cracking may cause premature deterioration of concrete slab structures in salt laden environments. Chlorides from either deicing salts or marine environments may cause chloride-induced corrosion of the reinforcing steel resulting in spalling of the cover concrete. Concrete specimens with 16 mm …
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Evaluation of a proposed vibration criterion
A lightweight floor system consisting of a concrete slab on steel joists or beams is susceptible to annoying vibrations caused by walking. This investigation considers a criterion developed by Allen (1991) that indicates whether a proposed structural floor system is acceptable for walking …
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Behavior and performance of steel moment-framed buildings subject to dynamic column loss scenarios
… and incorporating the steel deck and composite concrete slab floor system. Nonlinear material models were used along with simplified component models for beam and girder connections. Accurate structural and non-structural masses were used to capture realistic inertial effects. The models were …
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