一种桥梁桩基础空间刚度的模拟方法

为了准确模拟桩基础对桥梁结构的空间约束,在总结常用桩基模拟方法的基础上,提出一种新的等效结构来模拟群桩基础的空间刚度,然后采用基于WinKler假定的m法,根据柔度相等的原则,推导出这种等效结构的相关参数,最后通过与常用模拟方式比较验证的方式,验证这种等效结构的准确性。研究表明:该种虚拟结构构造简单、建模方便,能够模拟桩基础的空间刚度,满足工程设计要求。

Simulation Method for Spatial Stiffness of Bridge Pile Foundation

In order to simulate the space constraints on the pile foundation of bridge structure, a newequivalent structure is presented to simulate the space stiffness of pile group foundations based on thesummary of commonly used foundation simulation methods. Then, with Winkler-based m-method andaccording to the principle of equal flexibility, related parameters of the equivalent structure arederived. Finally, the accuracy of this equivalent structure is verified in comparison with the commonsimulation methods. The research results show that the virtual structure, being simple in structure andconvenient in modeling, can simulate the spacestiffness of pile foundation and meet therequirements of engineering design