摘要
本文对浅埋于可液化南京细砂地基中的地铁车站结构进行了大型振动台试验研究,对部分试验结果进行了整理,分析了模型地基的加速度和振动孔隙水压力的反应规律。试验结果表明:在整个试验过程中,模型地基浅层土和地铁车站侧向附近地基土最容易发生液化;其次,随着振动台台面输入地震动峰值加速度的增大,离车站结构较远的侧向地基土和底层地基土再发生液化,而车站结构正下方的模型地基土最不容易液化。同时,在模型地基土发生液化后,地铁车站结构发生了明显的整体上浮现象。
A large-scale shaking table test for subway station structure built in the liquefiable saturated fine sand soil is implemented . Partial test results are analyzed in this paper. The acceleration time-histories and the dynamic pore water pressure ratio time-histories of ground soils are given. During the whole process of testing, it is obvious that the soils at the top of model ground and beside the subway station structure is liquefied firstly. Then the soil far from the subway station structure and at the bottom of model ground is liquefied with the increasing of the peak value of acceleration inputted by the surface of shaking table. However, the soils under the subway station structure is not liquefied during the whole process of testing. At the same time, the subway station structure uplifts badly during the soil liquefaction.
出处
《地震工程与工程振动》
CSCD
北大核心
2007年第3期163-170,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金(50578076
50508002)
江苏省六大人才高峰资助计划基金(06-F-008)
城市与工程安全减灾省部共建教育部重点实验室基金
工程抗震与结构诊治北京市重点实验室开放基金(EESR2006090)
关键词
液化场地
地铁车站
大型振动台
模型试验
liquefiable site
subway station structure
large-scale shaking table test
model test
