Seismic responses of regular highway bridges under near-fault ground motions (COMPDYN 2017)

Hai Bin Ma, Wei Dong Zhuo, Gabriele Fiorentino, Davide Lavorato, Camillo Nuti, Ying Sun

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

5 Citations (Scopus)

Abstract

Ground motions recorded in near-fault areas have some specific characteristics that differ substantially from those recorded in far-fault regions. One of the main features of near-fault records is the pulse-like shape caused by forward-directivity effect. This peculiarity may lead to much more severe damage to bridge structures located in near-fault regions. However, both current Chinese and European codes for seismic design of highway bridges nearly have no consideration on near-fault seismic actions. In this study, typical regular highway bridges in China are idealized as single-degree-of-freedom (SDOF) systems. Then, the Makris mathematical model for the pulse-like records is used to perform a parametric analysis on a settled SDOF system. Effect of key parameters, such as the half-pulse number (n), fundamental period (T0), pulse period (Tp) and the peak velocity (Vp) from the mathematical model, on responses of SDOF systems are analyzed. The potential degradation phenomenon which might happen under near-fault earthquake ground motions is also considered by comparing the ductility coefficient spectrum. The results show that all the key parameters had a significant effect on both linear and nonlinear response spectrum and seismic response. The stiffness degradation phenomenon will lead to a larger ductility coefficient and the Vp is the most effective factor for the response under the near-fault mathematical input.

Original languageEnglish
Title of host publicationCOMPDYN 2017 - Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
EditorsM. Papadrakakis, Michalis Fragiadakis
PublisherNational Technical University of Athens
Pages2119-2137
Number of pages19
ISBN (Electronic)9786188284418
DOIs
Publication statusPublished - 2017
Event6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2017 - Rhodes Island, Greece
Duration: 15 Jun 201717 Jun 2017

Publication series

NameCOMPDYN 2017 - Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Volume1

Conference

Conference6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2017
CountryGreece
CityRhodes Island
Period15/06/1717/06/17

Keywords

  • Makris Model
  • Near-fault
  • Regular Highway Bridge
  • SDOF
  • Seismic Analysis
  • Spectrum Analysis

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