个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:President of international exchange committee of the Chinese Society of Rock Mechanics and Engineering CSRME
其他任职:国际岩石力学与岩石工程学会(ISRM)中国国家小组副主席
性别:男
毕业院校:东北大学
学位:博士
所在单位:土木工程系
办公地点:综合实验四号楼330
联系方式:tca@mail.neu.edu.cn
Modeling of Transverse Thermal Cracking of FRP Bars Embedded in Concrete
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论文类型:期刊论文
发表时间:2014-04-01
发表刊物:ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
收录刊物:SCIE
卷号:39
期号:4
页面范围:2621-2629
ISSN号:1319-8025
关键字:Thermal stress; GFRP bars; Concrete; Cracking propagation; CTEs
摘要:A thermo-mechanical model is employed to analyze the thermo-mechanical behavior of a widely used Fiber reinforced polymer reinforced concrete subject to thermo-mechanical loading under service conditions. The governing equations including heat transfer, thermo-mechanical deformation and damage evolution are briefly described in the model. A numerical model of glass fiber reinforced polymers (GFRP) embedded in concrete is then proposed to investigate thermally-induced damage and crack propagation at elevated temperatures. Numerical results are presented and compared with experimental and theoretical results in the form of crack propagation in stress profiles. The numerical simulations show that the crack propagation behavior of the GFRPembedded in concrete is closely dependent on the physico-mechanical properties of GFRP and concrete. The numerical study reveals that the cracking developed at the interface between the GFRP bar and the concrete was due to the significant difference in thermal expansion properties between the concrete and the GFRP at elevated temperatures. The numerical study also demonstrates that the model proposed can visually replicate the thermal cracking propagation process of concrete cover and provide good estimates of the critical temperature increment of concrete cover failure of a circular concrete reinforced with a single GFRP bar.