桥梁桩基抗震设计的六弹簧模拟方法

Six spring simulation method of seismic design of bridge pile foundation

为了研究六弹簧模型在桥梁桩基地震反应分析中的性能,基于一个工程实例,采用反应谱分析方法,通过与桩基弹性嵌固模拟方法进行比较,结果表明,由于地震作用具有方向性,反应存在方向组合问题,桩基六弹簧模拟方法是通过静力的方法反算各桩基的反应,因而,六弹簧模拟方法在桩基地震反应分析中存在方向组合问题。

In order to study the performance of six spring model in bridge pile foundation seismic response, based on an engineering example, this paper used the spectrum analysis method, through the comparison with pile foundation build-in simulation methods. The results showed that, because of the earthquake directional function, reaction existing direction combination problems, pile foundation six direction combination was used static method back calculated the action of the pile foundation, so, six spring simulation method existed direction combination problem in seismic response analysis.