桥墩纵桥向计算长度系数实用性求解方法研究

Research on Practicability of Solving Method for Effective Length Coefficient of Pier in Longitudinal Direction

总结了桥墩计算长度系数求解的两种基本方法:微分方程推导法、有限元模拟法。根据墩身受力的微分方程进行理论推导,得到了桥墩计算长度系数的超越方程,通过对大量计算数据的拟合,给出了桥墩计算长度系数的显式表达公式,概括了有限元模拟法计算桥墩计算长度系数的基本思路。辅以实例,对比验证了上述两种方法的可靠性。

Two basic methods of solving the effective length coefficient of pier are summarized,i. e.differential equation derivation method,and finite element simulation method. According to the theoretical derivation on differential equation for forced pier shaft,the transcendental equation for the effective length coefficient of pier is obtained. Basing on fitting a large amount of calculation data,the explicit formulation for the effective length coefficient of pier is given,and the basic idea of calculating the effective length coefficient of pier is summarized by finite element simulation method. Assisted by the living example,the reliability of the above two methods is compared and validated.