液化场地的桩-土-上部结构振动台模型试验的研究  

Study on shaking table model test of pile-soil-superstructure system in liquefied ground

作　　者：王凯[1] 钱德玲[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2011年第11期1687-1691,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(40772171;50278030);安徽省自然科学基金资助项目(050450402)

摘　　要：文章以液化场地桩-土-结构动力相互作用体系的振动台试验研究为基础,结合非液化场地桩-土-结构动力相互作用体系的振动台试验,再现了液化场地中上部结构与桩基的震害现象;基于振动台试验,对试验现象;孔隙水压力、土体及上部结构的动力反应、桩的应变等进行了研究和分析。结果表明:液化地基使承台在震后有明显的不均匀沉降,上部结构位移幅值显著增大,孔隙水压力随着地震波的增大而上升,结构的破坏与地震的波形有关,土体液化是桩基破坏的主要原因之一,液化土层也具有一定的减振隔震作用。This paper disclosed the earthquake disaster phenomena of the pile foundation and the superstructure system, which was based on the shaking table test of the pile-soil-superstructure system in the liquefied ground and compared with that in the non-liquefied ground. The variations of the pore water pressure, the dynamic response and displacements of the soil and superstructure and the strain of the pile shaft were analyzed by the shaking table test. The results show that the differential settle- ment of the pile cap is obvious in the liquefied ground after the earthquake; the displacement of the su- perstructure increases prominently; the pore water pressure increases with the rising of the seismic wave; there is a corresponding relationship between the structural failure and the seismic wave form; liquefaction is a major cause of the pile damage; the liquefied soil layer takes a part in keeping the superstructure in isolation from vibrating.

关 键 词：液化 振动台试验 地震响应 震害原因 

分 类 号：TU411.01[建筑科学—岩土工程]