客运专线非埋式路基桩板结构温度应力计算方法

Calculation Method of Temperature Stress in Non-embedded Pile-slab Structure on Passenger Dedicated Railway

针对客运专线非埋式路基桩板结构形式,根据桩板结构路基具体特性,运用力法基本原理推导了结构整体升、降温引起的承载板伸缩温度应力表达式。应用推导的公式计算该桩板结构温度力,并将解析解与数值解作了比较分析。结果表明承载板轴力解析式具有足够的计算精度,且解析解大于数值解,可用于非埋式路基连续桩板结构承载板温度应力计算。

According to the characteristics of non-embedded pile-slab structure on passenger dedicated railway,the calculating formula of stretch out and draw back temperature stress for bearing plate caused by the whole up-anddown temperature was deduced with the basic principle of the force method.The temperature stress of pile-slab structure was calculated.The analytical solution and the numerical solution were compared and analyzed.The results show that the analytical formula of the axial force of the bearing plate is sufficiently accurate,the analytical solution is larger than the numerical solution.The formula can be used in the calculation of temperature stress of the bearing plate of the non-embedded continuous pile-slab structure.