Global ETD Search
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 46 for “"pushover"”.
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Modal pushover analysis for high-rise buildings
Pushover analysis is a nonlinear static analysis tool widely used in practice to predict and evaluate seismic performance of structures. Since only the fundamental mode is considered and the inelastic theorem is imperfect for the conventional pushover analysis, a modified Modal Pushover Analysis …
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Assessment of the Seismic Vulnerability of Wall Pier Supported Highway Bridges on Priority Emergency Routes in Southern Illinois
… numerical models, one to perform nearly 200 pushover analyses, and one two perform nearly 100 dynamic time-history analyses (required for fragility curve construction). Details concerning the analytical sub-models used for representing the various bridge components in these models are given, …
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Seismic fragility of buildings damaged by past earthquakes
… In this research, the degradation of important pushover properties of structural columns is applied to represent the damage caused by a past earthquake and new deformation capacity will also be obtained using static pushover analysis. New fragility estimates are conducted to give the fragility …
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Effects of residual stresses and initial imperfections on earthquake response of steel moment frames
… frame models were subjected to monotonic pushover, cyclic pushover and response history analyses. The observed behavior was used to draw comparisons between systems with and without residual stresses and initial imperfections. Cyclic strength degradation at beam-to-column connections was …
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Simulation-based fragility relationships for unreinforced masonry buildings
… an extensive literature survey is conducted on pushover analysis of URM structures. Using this data, capacity diagrams are generated, from which damage exceedance limit states are defined. Demand is simulated using synthetically derived accelerograms representative of the CEUSA. Structural …
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Seismic Rehabilitation of Steel Moment Frames Vulnerable to Soft-Story Failures Through Implementation of Rocking Cores
… to the system. In addition, nonlinear static pushover analyses are performed to address the beneficial contribution of the RC to the system under the performance objectives including immediate occupancy, life safety, and collapse prevention. The Monte-Carlo simulation technique is used to …
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Improved seismic analysis of unreinforced masonry buildings with flexible diaphragms
… utilising single-mode, multi-mode and adaptive pushover analyses are investigated. Practical recommendations are provided for the use of various pushover analysis methods for unreinforced masonry buildings with flexible diaphragms.
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Junkballer
… of youth travel baseball and all its quirks. The pushover coaches, prescription drug abuse, kleptomaniac teammates, heat-stroke, and mosquitos the size of hummingbirds.</p>
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Surrogate learning for scoured bridges for capacity prediction with climate-scenario deep uncertainties
… framework, trained on nonlinear pushover analyses, to predict yield-level transverse capacities—base shear, deck displacement, base moment, and column rotation—collectively expressed as a capacity tuple. To incorporate deep uncertainty arising from future IPCC climate-scenario …
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Effect of Viscous Fluid Dampers on Steel Moment Frame Designed for Strength and Hybrid Steel Moment Frame Design
… Frame designs were obtained. Nonlinear static pushover analysis was applied to these frames, and as expected, the more reduction in the plastic capacity of the Hybrid Frame, the earlier the pushover curve starts yielding and the later the negative post yield stiffness of the pushover curve was …
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Performance assessment of special concentrically-braced frames in moderate seismic regions
… design procedure. The characteristic ductile pushover response for SCBFs was observed and three regions of secondary stiffness were defined and used to evaluate frame behavior. The secondary stiffness term that describes the first region of negative stiffness indicated the predominant behavior …
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Finite Element Analysis of the Connection Behavior of Precast Prestressed Piles to Cast-In-Place Bent Caps
… These piles were then subjected to a simulated "pushover" analysis to determine the behavior and moment capacity of each. </p> <p>Results of the study show that as the pile size get larger, the moment capacity is increased at the sacrifice of ductility. Additionally, moment capacity and ductility …
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Seismic assessment and strengthening of monumental masonry structures, with a particular focus on churches [Valutazione della vulnerabilità sismica e strategie di miglioramento per strutture monumentali in muratura, con particolare attenzione alle chiese]
… di riprodurre le proprietà modali, la risposta pushover e i meccanismi di danneggiamento. Successivamente, la tesi propone una metodologia operativa per la valutazione sismica che combina l’analisi pushover modale su un modello globale agli elementi finiti con l’analisi cinematica non lineare …
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Computational and Experimental Study on the Behavior of Diaphragms in Steel Buildings
… 13% and 48%. A comparison of results from pushover analyses and response history analyses indicated that even though the pushover analyses (based on a first mode load pattern) identified the BRBF as being weaker than the diaphragms and therefore dominating the inelastic pushover behavior, …
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Inelastic seismic behavior of stiffening systems : multi-span simply-supported (MSSS) bridges
… is lower for stiffening systems, consistent with pushover analysis based on the seismic codes. However, considering many other damage indices like dissipated hysteretic energy and low-cycle fatigue damage index, it is quite likely that a stiffening system would sustain more damage than an …
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Influence of Diaphragm Flexibility on the Out -of -Plane Dynamic Response of Unreinforced Masonry Walls
… 2DOF model incorporates the nonlinear static (pushover) response of two cracked wall segments rocking as rigid bodies.
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Seismic Fragility Assessment for Reinforced Concrete High -Rise Buildings
… states are based on the results of detailed pushover analyses of a multi-resolution distributed finite element model that includes shear-flexure-axial interaction effects. To develop the fragility relationships, more than two thousand dynamic response history analyses were conducted. This …
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Seismic Response of Short Period Structures and the Development of a Self-Centering Truss Moment Frame with Energy Dissipating Elements for Improved Performance
… SC-TMF includes a set of preliminary monotonic pushover analyses and nonlinear time history analyses to confirm the expected behavior of the system. Next, a mechanics investigation was undertaken where static pushover analyses (monotonic and cyclic) were used to help derive equations to predict …
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Performance-based seismic engineering of low and medium-rise steel frames
… a simple procedure is proposed which uses the pushover analysis method to estimate the average maximum interstory drift. The method defines a damage index which, after being calibrated, can directly be used for performance evaluation.
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Effect of Hysteresis Type on Drift Capacity for Global Collapse of Moment Frame Structures for Seismic Loads
… seismic loads. (4) Develop a nonlinear cyclic pushover procedure that can be used for estimating the global drift capacity of a specific building. To achieve these objectives, seismic analyses of 3-, 9- and 20-story moment resisting frame buildings were conducted to evaluate the effects of the …
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