建筑结构学报2012，Vol.33Issue(1)：128-137,10.
可液化场地地铁车站结构地震破坏特性振动台试验研究
Shaking table test on seismic failure characteristics of subway station structure at liquefiable ground
摘要
Abstract
Based on the plaster model of a three-story and three-span subway station on liquefiable ground, a series of shaking table tests on the seismic failure characteristics were conducted under the main shock and aftershock ground motions. With respect to the foundation, the following characteristics were discussed including the acceleration, dynamic pore water pressure, and earthquake-induced settlement of ground surface. The model subway station structure was concerned with the following features including the acceleration, the relative horizontal displacement, the strain, dynamic soil pressure on the side wall and its spatial effects. According to the tests, the sand and water spewing phenomenon, the earthquake-induced settlement and ground crack were successfully reproduced. Meanwhile, the floating of structure, member cracks and local damages were observed during the tests. Under the main shock ground motion, there appears a longer liquefaction duration time and the trends of pore pressure dissipation are not obvious, and the acceleration amplification effect of the soil is decreased. The foundation soil shows a remarkable shock absorption and concentration effect with low frequency. Under the aftershock ground motion, the dissipation of pore pressure in foundation soil becomes obvious. The peak acceleration of the structure increases with the height. The dynamic soil pressure on the side walls is smaller in the middle and larger at both ends. In addition, the interior column achieves the maximum value of peak dynamic strain. The peak strain and damage degree on both sides of interior column exhibit an “S” type distribution along the height. The seismic responses of both the foundation soil and the model subway station structure exhibit a remarkable spatial effect.关键词
地铁地下车站结构/可液化场地/地震作用/振动台试验/破坏特性/空间效应Key words
subway station structure/liquefiable ground/seismic excitation/shaking table test/failure characteristics/spatial effect分类
建筑与水利引用本文复制引用
陈国兴,左熹,王志华,杜修力,周恩全..可液化场地地铁车站结构地震破坏特性振动台试验研究[J].建筑结构学报,2012,33(1):128-137,10.基金项目
国家自然科学基金重大研究计划项目（90715018,90715035）,国家公益性行业科研专项（200808022）,江苏省高校自然科学重大基础研究项目（08KJA560001）. （）
