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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 21 for “"Confined concrete"”.
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Behavior of FRP-confined concrete
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Experimental research on BFRP confined concrete columns
Eldri byggingar fullnægja í mörgum tilvikum ekki kröfum gildandi staðla auk þess sem mögulegt er að burðarkerfi þeirra hefur orðið fyrir skemmdum. Ýmsar ástæður geta verið fyrir þessu, m.a. öldrun, hrörnun vegna veðrunaráhrifa, aukið álag vegna breyttrar notkunar, skemmdir vegna óhappaálágs eða …
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Performance of confined concrete columns under simulated life cycles
… as a method of retrofitting existing reinforced concrete structures to bring them up to current code standards of confinement and ductility. The development of stress-strain models for FRP confined concrete began with the adaptation of steel confinement models then progressed to models …
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Behavior of pressure confined concrete in monotonic and cyclic loadings
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1987.
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Stress-Strain Behavior for Actively Confined Concrete Using Shape Memory Alloy Wires
… memory allow (SMA) wires to actively confine concrete members is discussed and further researched in great detail. This new confinement method utilizes a constant confining pressure that is a direct result to the SMA material being able to recover large inelastic strains with the application …
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Assessment of FRP-confined concrete : understanding behavior and issues in nondestructive evaluation using radar
… materials for strengthening and retrofitting of concrete columns and bridge piers has urged the development of' an effective non-destructive evaluation (NDE) methodology. Radar technologies have shown great potential for assessing the structural and material integrity of FRP-confined concrete …
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Effect of Stacking Sequence and Fiber Orientation on the Stress-Strain Behavior of CFRP Confined Concrete Cylinders
… behavior of fiber reinforced polymer (FRP) confined concrete. This thesis presents the results of an experimental investigation examining the effect of parameters such as fiber orientation, amount of confinement, and specimen size on the behavior of FRP-confined concrete. As part of the …
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Experimental testing and constitutive modeling of concrete confined with shape memory alloys
Concrete confinement has been proven to be effective in increasing concrete strength and ductility, which are essential characteristics for structures prone to extreme loading events, such as earthquakes. Andrawes and Shin (2008) first proposed the idea of using shape memory alloy (SMA) spirals to …
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Behavior of structural concrete members strengthened by composite fabrics
… (FRP) materials to repair and strengthen various concrete members is becoming more and more popular in structural retrofitting field. Among all the confining materials, Carbon Fiber Reinforced Polymer (CFRP) fabric jackets are identified as an effective way to enhance the strength and ductility of …
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Strength and Ductility of Concrete Cylinders Confined with Fiber Metal Laminate Composites
… Externally bonded FRP retrofits of reinforced concrete elements provide an efficient, economical, and accepted method of mitigating deficiencies related to seismic and blast loads, as well as addressing corrosion-related issues. FRPs retrofits are widely regarded as cost effective as the cost …
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Application of New Materials and Innovative Detailing for Reinforced Concrete Structures
<p>Confinement enhances mechanical properties of concrete sections specifically its strain capacity thus results is higher displacement capacity for reinforced concrete members. Even though the behavior of concrete confined with external jackets has been extensively investigated in previous …
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Detailing for compression in reinforced concrete wall boundary elements: experiments, simulations, and design recommendations
Reinforced concrete structural walls are one of the most common lateral force-resisting systems in buildings located in high seismicity regions. Walled structures are expected to provide significant strength and ductility under cyclic earthquake loading. In part, this expectation is based on the …
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Quantifying the compressive ductility of concrete in RC members through shear friction mechanics.
… papers in which the compressive ductility of concrete in RC members has been quantified through shear friction mechanics. Firstly, the size dependent stress‐strain models for unconfined and actively confined concrete are derived based on the fundamental mechanics of shear friction theory. At …
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Axial compressive behaviour of FRP-confined high-strength concrete
External confinement of concrete columns with fibre-reinforced polymer (FRP) sheets has been shown to lead to significant improvements on the axial compressive behaviour of these columns. This application of FRP composites is effective as a confinement material for concrete, in both the seismic …
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Axial load capacity of circular steel tube columns filled with high strength concrete
… examines the axial load capacity of circular Concrete Filled Steel Tube columns using High Strength Concrete (CFST-HSC). Emphasis is drawn to the enhanced axial capacity of short columns attributed to the lateral confinement of the concrete infill provided by the steel encasement. The degree …
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Innovative Self-Centering Connection for CCFT Composite Columns
Concrete filled steel tubes are regarded as ideal frame members in seismic resisting systems, as they combine large axial and flexural capacity with ductility. The combination of the two materials increases the strength of the confined concrete and avoids premature local buckling of the steel tube. …
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Nonlinear inelastic analysis of concrete-filled steel tubular slender beam-columns
High strength thin-walled concrete-filled steel tubular (CFST) slender beam-columns may undergo local and global buckling when subjected to biaxial loads, preloads or cyclic loading. The local buckling effects of steel tube walls under stress gradients have not been considered in existing numerical …
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Development of Novel Computational Simulation Tools to Capture the Hysteretic Response and Failure of Reinforced Concrete Structures under Seismic Loads
Reinforced concrete (RC) structures constitute a significant portion of the building inventory in earthquake-prone regions of the United States. Accurate analysis tools are necessary to allow the quantitative assessment of the performance and safety offered by RC structures. Currently available …
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An Analytical Study on the Behavior of Reinforced Concrete Interior Beam-Column Joints
Reinforced concrete (RC) moment frame structures make up a notable proportion of buildings in earthquake-prone regions in the United States and throughout the world. The beam-column (BC) joints are the most crucial regions in a RC moment frame structure as any deterioration of strength and/or …
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Seismic characterization of recycled aggregate concrete
… environmental benefits of recycling waste concrete and reusing it as aggregate for structural concrete, but the use of Recycled Aggregate Concrete (RAC) is yet limited to non-structural applications such as road sub-base. Widespread application of RAC in areas such as seismic design …
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