期刊
COMPOSITE STRUCTURES
卷 182, 期 -, 页码 54-66出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2017.09.007
关键词
Stress-strain model; Bar buckling; FRP confinement; Cyclic model; OpenSees
资金
- Research Grants Council of the Hong Kong SAR [PolyU 152171/15E]
- National Natural Science Fund of China [51408136, 51678014]
- Science Fund for Creative Research Groups of the National Natural Science Foundation of China [51421005]
- Research Grants from China Postdoctoral Science Foundation [2016M591035]
Buckling of steel reinforcement usually causes a sudden loss of the load-carrying capacity and the ultimate state of conventional reinforced concrete (RC) cylinders. However, reinforcing bars behave differently in fiber-reinforced polymer (FRP)-confined RC cylinders due to the lateral confinement effect of FRP. This paper presents a theoretical study into the buckling behavior of longitudinal steel reinforcing bars embedded in FRP-confined concrete subjected to cyclic axial compression. An empirical monotonic compressive stress-strain model considering the buckling effects proposed previously for laterally supported reinforcing bars is extended to a cyclic model by combining the monotonic envelope and the Menegotto-Pinto model accounting for the cyclic loops. The cyclic stress-strain models for both laterally supported reinforcing bars and FRP-confined plain concrete are then implemented into the OpenSees software platform and validated through comparisons with compressive test results on cyclically loaded FRP-confined plain and RC cylinders. The proposed cyclic stress-strain model for laterally supported reinforcing bars is expected to serve as a fundamental model for predicting the seismic behavior of FRP-strengthened RC cylinders with widely-spaced transverse ties under cyclic axial compression, in which case the local buckling of reinforcing bars usually occurs between two adjacent transverse ties. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据