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Seismic performance of precast concrete frames with debonded reinforcement

  • Huang Yuan
  • Yi Weijian
  • Clay J. Naito
  • Zhang Rui
Original Article
  • 265 Downloads

Abstract

This paper utilizes experimental and numerical studies to investigate the seismic behavior of precast concrete frames. The system is composed of monolithic columns and composite precast concrete beams with debonded reinforcement at the beam end, with the purpose of distributing plasticity over a larger rebar length to improve the seismic performance of traditional precast concrete frames. Two half scale precast concrete frames, with and without debonded rebar, were tested under quasi-static cyclic lateral load. The observations during the test, load–displacement curves, stiffness, energy dissipating capacity and rebar strain are discussed. The experimental findings demonstrate that rebar debonding lead to reduced strain in tensile reinforcement. The decrease in strain due to the debonded rebar was 40.2% at a drift ratio of 1%. The performance of the specimens was evaluated according to ACI 374, which demonstrates that this precast system is applicable to seismic regions. In the numerical simulation study, a macro-based finite element (FE) model was developed using fiber-section beam-column element with a modified rebar constitutive model to take into account the effect of rebar buckling. The feasibility of the FE model was verified by comparing with the experimental data.

Keywords

Seismic performance Precast concrete Frame Debond Finite element analysis 

Notes

Funding

This study was funded by the National Science Foundation of China (Grant No. 51478174), the National Key Research and Development Program of China (Grant No. 2016YFC0701400).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© RILEM 2018

Authors and Affiliations

  1. 1.Hunan Provincial Key Lab on Damage Diagnosis for Engineering StructuresCollege of Civil Engineering, Hunan UniversityChangshaPeople’s Republic of China
  2. 2.Lehigh UniversityBethlehemUSA

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