A modified quasi-static model with lateral stiffness deterioration mechanism for self-centering concrete pier

H. Liu, M. He, J. Guo, Y. Shi, Zh Hou

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Self-centering pier (SCP) has been viewed as a remarkable accomplishment which is able to sustain major lateral loading with reduced structure damage in seismic engineering. Stiffness deterioration observed in experiment is vital for the seismic performance of self-centering concrete pier. In this contribution, the associated stiffness deterioration with respect to the structural damage is modeled in a modified analytical model for SCP comprehensively. In the proposed modified theoretical model, the lateral force-displacement relation associated with the stiffness reducing is analyzed. Three damage factors are introduced in the stiffness deterioration analysis to illustrate the damage evolution caused by gradually increasing lateral displacement. The proposed modified quasic-static model with damage evolution or stiffness deterioration has been validated against an experiment we conducted, where a good agreement is clearly evident. Subsequently, a parametric investigation focusing on aspect ratio, initial pre-tension, and ratio of ED (Energy Dissipator) was conducted to evaluate the hysteretic behavior of SCP under quasi-statically cyclic loading.

Original languageEnglish
Pages (from-to)223-233
Number of pages11
JournalInternational Journal of Civil Engineering
Volume13
Issue number2A
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Damage
  • Quasi-static
  • Residual displacement
  • Self-centering pier
  • Stiffness deterioration

ASJC Scopus subject areas

  • Civil and Structural Engineering

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