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Response of lap splice of reinforcing bars confined by FRP wrapping: application to nonlinear analysis of RC column
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  • Response of lap splice of reinforcing bars confined by FRP wrapping: application to nonlinear analysis of RC column
  • Response of lap splice of reinforcing bars confined by FRP wrapping: application to nonlinear analysis of RC column
저자명
Pimanmas. Amorn,Thai. Dam Xuan
간행물명
Structural engineering and mechanics : An international journal
권/호정보
2011년|37권 1호|pp.111-129 (19 pages)
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테크노프레스
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

This paper presents a nonlinear analysis of reinforced concrete column with lap splice confined by FRP wrapping in the critical hinging zone. The steel stress-slip model derived from the tri-uniform bond stress model presented in the companion paper is included in the nonlinear frame analysis to simulate the response of reinforced concrete columns subjected to cyclic displacement reversals. The nonlinear modeling is based on a fiber discretization of an RC column section. Each fiber is modeled as either nonlinear concrete or steel spring, whose load-deformation characteristics are calculated from the section of fiber and material properties. The steel spring that models the reinforcing bars consists of three sub-springs, i.e., steel bar sub-spring, lap splice spring, and anchorage bond-slip spring connected in series from top to bottom. By combining the steel stress versus slip of the lap splice, the stress-deformation of steel bar and the steel stress-slip of bars anchored into the footing, the nonlinear steel spring model is derived. The analytical responses are found to be close to experimental ones. The analysis without lap splice springs included may result in an erroneous overestimation in the strength and ductility of columns.