桩土相互作用及其简化方法对连续梁桥地震响应研究

On mutual effect of piles and soil and seismic effect on continous bridge with its simplified method

介绍了桩土相互作用的四种简化方法,建立了基于四种方法的连续梁桥模型,并进行了地震响应对比研究,结果表明:建立在桩基支撑的大跨度连续梁桥,应当合理考虑基础刚度或桩—土结构动力相互作用的影响,采用m法、一般p-y法、固结法等方法会高估连续梁桥的地震响应,嵌固法的地震响应比前三者小一些。

The paper introduces the four simplified methods for the mutual effect of piles and soil,establishes the continuous bridge models to undertake seismic response comparison,proves by the result that the influence of basement stiffness or pile-soil structure＇s dynamic mutual effect should be considered in setting up the large-span continous bridge on the pile foundation support,and the seismic response will be overestimated by adopting m method,general p-y method or consolidation method while the seismic response of the embedded method is relatively smaller compared with the others.