Response Analysis of RC Bridges with Different Deck Slabs to Seismic Motions with Forward Directivity and Fling Step
Year: 2025
Type: article
Abstract: The presence of fling-step and forward-directivity, as distinctive features of near-fault ground motions, can lead to substantial alterations in the seismic performance of reinforced concrete bridges. This study examines the seismic performance of reinforced concrete bridges with various deck slabs subjected to two distinct sets of earthquake events. One set is of forward-directivity records and the other set is of fling-step records. Three-dimensional finite element models for the analyzed reinforced concrete bridges are constructed using the CSI-BRIDGE software package, incorporating appropriate material and geometric nonlinearities. The developed bridge models are of three spans and have different deck slab systems namely; box-girder, RC girder and hollow-core slab bridges. Extensive nonlinear response time-history analyses of various configurations representing the examined RC bridges are performed to elucidate the impact of seismic loads, including forward-directivity and fling-step records, on the seismic response of supporting columns and deck slabs in the longitudinal direction. The numerical simulations indicate that ground vibrations with fling-step significantly amplify the seismic response demands in both substructure and superstructure elements. Moreover, bridge type substantially influences the induced seismic responses particularly supporting columns and deck slabs.
Source: Infrastructures
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,172
Funder: King Abdulaziz University
OpenAlex ID: W4416167167