HYDRATION HEAT AND CONSTRAINED EXPANSION OF MICRO-EXPANSIVE CONCRETE-FILLED STEEL TUBES
The expansive capability and stress field of 4 microexpansive concrete-filled steel tubes (MCFST) and 1 conventional concrete filled steel tube (CFST) were studied by experiment method. The main parameter studied is the quantity of expansive agent. It is shown that the temperature field in MCFST is similar to that of ordinary concrete members. Concrete core has obvious effect on shrinkage-compensating with the addition of swelling agent. Meanwhile,pre-stress is produced in the concrete constrained by the steel tube. Based on the experiment,strain characteristics and the influential factors of constrained expansion in the concrete core were analyzed. The features of generating and distributing of pre-stress and its relation to the quantity of expansive agent were investigated,which provide dependencies for optimal design of MCFST.
Concrete-filled steel tubek Micro-expansive,Hydration heat Constrained expansion
Meng-Cheng Chen Fang Yuan Kai-Cheng Xu
Engineering Research Centre of Railway Environment Vibration and Noise of Ministry of Education,East China JiaoTong University,Nanchang,330013,P.R.China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1761-1764
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）