This study investigates the three-dimensional seismic response of plan-irregular reinforced concrete (RC) frame structures subjected to near-fault pulse-like ground motions. The primary scientific contribution lies in evaluating how perimeter-distributed, short-stroke displacement-activated hysteretic dampers interact with complex structural torsional modes under the coupled influence of soil–structure interaction (SSI). Through unscaled nonlinear time–history analyses, this research exposes a critical vulnerability: foundation flexibility elongates the structural period, moving the system into close resonance with near-fault pulse content and more than doubling peak inter-storey drift demands. Concurrently, we demonstrate that the supplemental hysteretic system provides immediate elastic stiffness that successfully counteracts this SSI-induced period elongation, restricting peak drift amplifications to under 0.21% while actively mitigating torsional twisting. These findings provide a quantitative framework for the dual management of foundation flexibility and torsional irregularity using short-stroke metallic yielding devices.
To investigate the seismic performance and damage evolution of a curved continuous rigid-frame composite girder bridge under near-fault velocity pulse-like ground motions, a refined three-dimensional full-bridge finite element model was established, incorporating pile–soil interaction, expansion joint pounding, shear k...
Rectangular reinforced concrete (RC) hollow bridge piers may exhibit significant shear participation after flexural cracking and yielding, whereas their seismic responses are commonly evaluated using flexure-dominated numerical models. This study investigates the effects of axial–flexure–shear interactions on the cycli...
Structural irregularities can alter seismic deformation and internal force requirements, but comparisons of different types of irregularities using a single set of response measures remain limited. This research introduces a response-index framework for comparing seismic performance of irregular reinforced concrete (RC...
Zeeshan Khan, A. Rafiq, Muhammad Fahad Ullah et al.· Buildings· 0 citations
Earthquakes produce significant lateral forces on structures, which may lead to excessive displacement, structural
instability, and collapse if proper seismic resistant measures are not adopted. The present study focuses on the comparative
seismic performance evaluation of a G+11 reinforced cement concrete (RCC) buildi...
Utkarsh Mishra, R. Grover· International Journal for Re...· 0 citations
This study evaluates the influence of Soil–Structure Interaction (SSI) on the seismic vulnerability of a Department of Public Works and Highways–derived reinforced-concrete bridge column subjected to near-fault ground motions. Nonlinear fiber-based models were developed for fixed-base, stiff-soil, and soft-soil support...
Franklyn F. Manggapis, Joe Robert Paul G. Lucena, S. D. Kumar et al.· Civil Engineering Journal· 0 citations
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