基于非线性温差的薄壁空心高墩墩顶位移研究

Research on Top Displacement of Thin-Walled Hollow High Pier Based on Nonlinear Temperature Difference

针对薄壁空心高墩的结构特点,依据相应的热学和力学原理,通过严谨的数学推导,得出基于非线性温差的薄壁空心高墩的墩顶位移解析公式,并通过解析值、有限元数值解和现场实测值三者进行对比分析,验证该解析公式的准确性。结果表明:论文所推导的墩顶温差位移解析公式计算结果与有限元计算值和现场实测值都较为接近,具有较高的精度,可以作为一种新的且便于使用的墩顶温差位移计算方式。

In this paper, according to the structural characteristics of thin-walled hollow high pier, according to the corresponding thermal and mechanical principles, through rigorous mathematical derivation, the analytical formula of the pier top displacement based on the nonlinear temperature difference of thin-walled hollow high pier is obtained, and the analytical value, finite element numerical solution and field measured value are compared and analyzed to verify the accuracy of the analytical formula. The results show that the analytical formula of pier top temperature difference displacement derived in this paper is close to the finite element calculation value and the field measured value, with high accuracy, and can be used as a new and convenient calculation method of pier top temperature difference displacement.