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

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第12期14卷 856-866页

作者： Hui LIU Ming-hua HE Yu-qi LUAN Jia GUO Lu-lu LIU Department of Civil Engineering Tsinghua University Research Institute of Highway of China Ministry of Transport Institute of Chemical Machinery Zhejiang University

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.

关键词： FRP confined concrete Constitutive model OpenSees user material Secondary development

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