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 29 for “"base shear"”.
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Influence of Vertical Ground Motion on Bridges Isolated with Friction Pendulum Bearings
… that the vertical motion can amplify both the base shear and the storyacceleration in the isolated building. Vertical shaking introduced high frequency variationin the axial force of the bearings, and consequently a high frequency component in thebearing lateral force, which excited higher …
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Seismic Design Studies of Low-Rise Steel Frames
… dependent on several parameters such as design base shear, beam-to-column strength ratio, moment-resisting connection behavior, nonstructural element participation, etc. The influence of these parameters was determined by performing inelastic time-history analyses.
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Nonlinear Dynamic Analysis of Structures with Hyperelastic Devices
… MDOF frame are stability, residual displacement, base shear, and dispersion. The structure is analyzed under two ground motion records of varying content, and for two separate P-Delta cases of varying severity. Two sets of hyperelastic braces are investigated for their influence under the two …
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Use of Incremental Dynamic Analysis to Assess the Performance of Steel Moment-Resisting Frames with Fluid Viscous Dampers
… were performed to obtain responses, such as peak base shear, peak interstory drift, or residual displacement index, which were plotted versus earthquake intensity to create individual IDA curves. Sets of related IDA curves provide a useful summary of the structural behavior for a wide range of …
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Analytical and Experimental Investigation of Improving Seismic Performance of Steel Moment Frames Using Synthetic Fiber Ropes
… a corresponding minimal increase to the maximum base shear. Base shear was reduced at several peaks subsequent to the initial pulse of the Northridge ground-motion input. The analytical model developed was excellent for predicting elastic response of the 1:6-scale shaking table experiments and …
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Investigation of Modular Cross-Laminated Timber Rocking Walls and Rocking Wall -- Light-Frame Shear Wall Dual Systems for Seismic Resilience
… resisting systems (LFRS) with wood light frame shear walls (LiFS). The first part of this dissertation details the experimental cyclic testing of six large-scale PT-CLT-RW with modular base connections. The tests were designed to replicate the first story of low- to mid-rise mass timber …
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Inelastic Dynamic Behavior And Design Of Hybrid Coupled Wall Systems
… used to couple two or more reinforced concrete shear walls in series, can be designed to have these attributes and therefore have the potential to deliver good performance under severe seismic loading. This research presents an investigation of the seismic behavior of this type of structural …
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Surrogate learning for scoured bridges for capacity prediction with climate-scenario deep uncertainties
… 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 trajectories, we employ a credal-set approach that yields upper and …
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Evaluation of Strength Reduction Factor for Concentrically Braced Frames Based on Nonlinear Single Degree-of-Freedom Systems
… R-Factors allow for a reduction in design base shear demands, leading to more economical designs. The reduction of strength is remedied with ductile behavior in members of proper detailing. Modern seismic codes and provisions recommend R-Factors for many types of lateral force resisting …
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Seismic retrofitting of deficient Canadian buildings
… A case study assessing the performance of hybrid base isolation systems is then presented. The performance of passive and semi-active hybrid base isolation system is evaluated through the use of a SIMULINK computer model of a typical two-story concrete frame building. A significant reduction in …
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Parametric study of timber shear walls
Timber shear walls comprise the vertical element of the lateral force resisting system in many low-rise buildings in North America. A typical shear wall consists of a solid panel product connected to a light timber frame with either a dowel-type fastener, such as nails, or elastomeric adhesives. …
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A Comparison of Optimized Nonlinear Time History Analysis and the Equivalent Lateral Forces Method for Brace Design
… Current design specifications for BRBF's are based on inelastic design spectra and approximate formulas for the determination of natural period. These spectra are used to obtain seismic base shear, and the distribution of equivalent lateral forces. Yielding and drift criteria are then used to …
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Hybrid simulation of steel frames with semi-rigid connections
… results are presented including story drift and base shear time histories. In addition, the moment-rotation diagrams from the hybrid simulation and cyclic testing are presented. Finally, a phenomenological model based on the Bouc-Wen formulation is fitted to the moment-rotation data. The model is …
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Effect of Variation of the Systemic Parameters on the Structural Response of Single Degree of Freedom Systems Subjected to Incremental Dynamic Analysis
… on the structure. The scaling factor was based on the spectral acceleration at the fundamental frequency of the structure at 5% of critical damping. The scale factor is affected if the system parameters are changed. An important issue for this study was whether to persist with scaling …
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Improvement of inelastic performance for friction damped asymmetric buildings
… model is studied using the history of base shear and torque. A single storey model with stiffness ratio of three and strength ratio of one is subjected to an earthquake over the range of slip load and stiffness eccentricity indicated above. The results show that as $\rm e\sb{pb}$ …
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Seismic retrofit of existing reinforced concrete moment resisting frame structures using diagonal prestressing
… the NBCC has increased the values of elastic base shears over the years. Between the 1970 and 2005 editions of NBCC, the elastic design base shear has increased by a factor as high as 2.6. A structure designed in 1970, if subjected to 2005 NBCC compatible design earthquake record would …
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Effects of a Flexible Foundation on the Response of a Timber Shear Wall
… flexible foundations on the response of timber shear walls. Timber shear walls, which typically consist of structural-use panels, such as plywood or oriented strand board (OSB), attached to a frame made from dimension lumber with dowel-type fasteners such as nails, provide resistance to lateral …
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A New Visco-Plastic Device for Seismic Protection of Structures
… reduction in the story displacements, base shear and bending moment at column bases.
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Forced Vibration Testing and Analysis of Pre- and Post- Retrofit Buildings
… Both buildings were comprised of concrete shearwalls and steel moment frames in the north/south direction and moment frames in the east/west direction. The retrofit strengthened the moment connections and added braces to the perimeter walls in the east/west direction.</p> <p> The natural …
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