Experimental Research on Shrinkage and Time Deformations of Main Bridge with(108+2&times;185+115)m Continual Rigid Frame

MA Ming

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Journal of Railway Engineering Society ›› 2010, Vol. 27 ›› Issue (10) : 67-73.

Experimental Research on Shrinkage and Time Deformations of Main Bridge with(108+2×185+115)m Continual Rigid Frame

MA Ming

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Abstract

Research purposes: The construction of the intercity rapid rail transit from Guangzhou to Zhuhai(including Zhongshan to Jiangmen)is the first time for China to construct the intercity rapid rail transit in the true sense．In which the main bridge with(108+2×185+115)m continual rigid frame crossing RongGui canal is the longest span ballastless track bridge structure in China．Under natural environment，there are lots of factors to influence the bridge creep and the all factors influence each other，80 the influence mechanisms are very complicated．As the ballasfless track bridge structure has high request for the later shrinkage and time deformations，it is very important to explore the change laws of the shrinkage and time deformation．．

Research conclusions: From the experimental research it is concluded to properly increase the concrete aging at stretching prestress and the secondary permanent load time can decrease the later shrinkage deformation of the structure．When the temperature is fixed and humidity increases，the displacement of the upper arch in the middle of the span decreases，and when the humidity is fixed and temperation increases，the displacement of the upper arch in the middle of the span increases．

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continual rigid frame / shrinkage and time deformation / experimental research

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MA Ming. Experimental Research on Shrinkage and Time Deformations of Main Bridge with(108+2×185+115)m Continual Rigid Frame[J]. Journal of Railway Engineering Society, 2010, 27(10): 67-73

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