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Capacity-Based Inelastic Displacement Spectra for Seismic Evaluation and Design of Reinforced Concrete Bridges

  • Kuo-Chun ChangEmail author
  • Ping-Hsiung Wang
  • Yu-Chen Ou
Conference paper

Abstract

Capacity-based inelastic displacement spectra that comprise an inelastic displacement (\( C_{R} \)) spectrum and a corresponding damage state (\( DI \)) spectrum are proposed to aid seismic evaluation and design of reinforced concrete bridges. Nonlinear time history analyses of SDOF systems are conducted using a versatile smooth hysteretic model that accounts for the influences of various column design parameters when subjected to far-field and near-fault ground motions. The computed spectra show that the \( C_{R} \) for far-field ground motions approximately conforms to the equal displacement rule for structural period (\( T_{n} \)) larger than around 0.8 s and that for near-fault ground motions departs from the rule in all spectral regions. Moreover, most of the design scenarios investigated in this research cannot survive the near-fault ground motions when relative strength \( R = \) 5.0. Based on the computed spectra, \( C_{R} \) and \( DI \) formulae are presented as a function of \( T_{n} \), \( R \), and various design parameters for far-field and near-fault ground motions, respectively.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringNational Taiwan UniversityTaipeiTaiwan
  2. 2.National Center for Research on Earthquake EngineeringTaipeiTaiwan

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