A modified constitutive model for FRP confined concrete in circular sections and its implementation with OpenSees programming

作     者：Hui LIU Ming-hua HE Yu-qi LUAN Jia GUO Lu-lu LIU 

作者机构：Department of Civil Engineering Tsinghua University Research Institute of Highway of China Ministry of Transport Institute of Chemical Machinery Zhejiang University 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2013年第14卷第12期

页      面：856-866页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Project supported by the National Natural Science Foundation of China(Nos.51378292,51038006,and U1134110) the China Postdoctoral Science Foundation(No.2013M530048) 

主　　题：FRP confined concrete Constitutive model OpenSees User material Secondary development 

摘      要：OpenSees is a well-recognized open source platform with high compatibility,and it has a well-developed fiber element method to cope with nonlinear structural *** reinforced polymer(FRP)confined concrete can effectively improve the seismic performance of concrete ***,sophisticated constitutive models for FRP confined concrete are not available in the current version of *** this paper,after reviewing several typical FRP confined concrete constitutive models,a modified constitutive model for FRP confined concrete in circular sections was proposed based on Lam and Teng(2003)’s model with four main modifications including the determination of FRP rupture strain,ultimate condition,envelope shape,and hysteretic *** embed the proposed constitutive model into OpenSees is a practical solution for engineering ***,the secondary development of OpenSees New UserMat was briefly demonstrated and a set of critical steps were depicted in a flow ***,with the numerical implementations of a series of FRP confined concrete members covering a wide range of load cases,FRP confinement types and geometric properties,the utility and accuracy of the proposed model compared with Lam and Teng(2003)’s model and new material secondary development in OpenSees were well validated.