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《Journal of Railway Science and Engineering》 2011-02
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Study on temperature-thermal stress field of hydration heat of railway cable-stayed bridge pile cap

ZHAI Jian-ping1,QIN Hong-xi2,HE Xu-hui2(1.Nanning-Guangzhou Railway Co.Ltd,Nanning 530022,China; 2.School of Civil Engineering,Central South University,Changsha 410075,China)  
Based on the physical and thermodynamic parameters acquired by experiment,FEM.calculation model is established and the theoretical hydration heat-thermal stress field was obtained.With the theoretical simulation and the monitoring results,the regular law and time-history curve of hydration heat was obtained,and the variation of inner temperature gradient along the height direction as well as the longitudinal direction with the concrete age were studied.Besides,the distribution law of thermal stress in pile cap's edge area was analyzed.The feasibility of temperature control measures was verified by numerical analysis and observed data,and the results can improve structural reliability and provide reference for design and engineering of the similar projects.
【CateGory Index】: U441.5
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