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ORIGINAL RESEARCH article

Front. Built Environ.
Sec. Bridge Engineering
Volume 10 - 2024 | doi: 10.3389/fbuil.2024.1447454

Seismic Responses of Isolated Bridges Subjected to Near-Fault Ground Motions: Simple Pulses vs. Whole Records

Provisionally accepted
Ying-Xin Hui Ying-Xin Hui 1,2*Jie Wang Jie Wang 1,3Jia-Le Lv Jia-Le Lv 2
  • 1 Ningxia University, Yinchuan, China
  • 2 Ningxia Communication Construction Co., LTD, Yinchuan, Henan Province, China
  • 3 Ningxia Haiping Expressway Management Co., Ltd., Zhongwei, China

The final, formatted version of the article will be published soon.

    Velocity pulse with strong energy input is the significant feature of near-fault ground motions. Bridges close to or passing across seismic faults may suffer from higher failure risk, which is inseparable from the influence of velocity pulse. This study aims to evaluate the nonlinear response characteristics of bridge structures under various near-fault ground motion conditions. A typical isolated continuous girder bridge is adopted, and two corresponding finite element models, i.e., considering and ignoring the heating effect of lead core bearings (LRBs), are established based on the OpenSees platform. Then, a total of 40 near-fault ground motion records are selected, and the pulses are extracted. Both the energy-based and deformation-based seismic responses are captured and compared to reveal the differences for the isolated bridge subjected to the original waves and the extracted pulses. The results highlight that the accuracy of the seismic evaluation based on the extracted pulses strongly depends on the precondition that the pulse period is close to the fundamental period of the isolated bridge. Hence, inputting the extracted pulses for predicting the in-elastic seismic response of isolated bridges locating at near-fault

    Keywords: Isolated bridges, Near-fault ground motion, Velocity pulse, energy dissipation, heating effect of lead core bearings

    Received: 11 Jun 2024; Accepted: 15 Jul 2024.

    Copyright: © 2024 Hui, Wang and Lv. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Ying-Xin Hui, Ningxia University, Yinchuan, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.