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Nonlinear Analytical Model of Unreinforced Masonry Wall using Fiber and Shear Spring Elements

파이버 및 전단 스프링요소를 이용한 비보강 조적벽체의 비선형 해석모델

  • Hong, Jeong-Mo (Department of Architectural Engineering, University of Seoul) ;
  • Shin, Dong-Hyeon (Department of Architectural Engineering, University of Seoul) ;
  • Kim, Hyung-Joon (Department of Architectural Engineering, University of Seoul)
  • 홍정모 (서울시립대학교 건축공학과) ;
  • 신동현 (서울시립대학교 건축공학과) ;
  • 김형준 (서울시립대학교 건축공학과)
  • Received : 2018.07.25
  • Accepted : 2018.10.26
  • Published : 2018.12.31

Abstract

This study intends to develop an analytical model of unreinforced masonry(URM) walls for the nonlinear static analysis which has been generally used to evaluate the seismic performance of a building employing URM walls as seismic force-resisting members. The developed model consists of fiber elements used to capture the flexural behavior of an URM wall and a shear spring element implemented to predict its shear response. This paper first explains the configuration of the proposed model and describes how to determine the modeling parameters of fiber and shear spring elements based on the stress-strain curves obtained from existing experimental results of masonry prisms. The proposed model is then verified throughout the comparison of its nonlinear static analysis results with the experimental results of URM walls carried out by other researchers. The proposed model well captures the maximum strength, the initial stiffness, and their resulting load - displacement curves of the URM walls with reasonable resolution. Also, it is demonstrated that the analysis model is capable of predicting the failure modes of the URM walls.

Acknowledgement

Supported by : 국토교통부

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