摘要
为分析超高层建筑施工中深基坑支护承压结构在地震作用下的局部抗震效果,应用有限元软件对某超高层深基坑工程进行了分析,建立了超高层施工中深基坑支护承压结构的有限元计算模型,并利用地震模拟振动台,输入0.4g、0.5g和0.6g的地震时地表运动加速度,对比不同深基坑施工阶段和插入比地下连续墙深基坑支护承压结构的抗震效果,并探究不同的地震烈度变形效应对深基坑支护承压结构位移的影响,采用振型分解反应谱方法,得到了超高层建筑深基坑支护承压结构的抗震稳定效果。试验结果显示,在超高层住宅建筑深基坑支护中,深基坑开挖深度和地震烈度是影响其抗震稳定的重要因素,而插入比则是与深基坑支护结构的地震稳定程度成正比关系,并可有效提高其抗震效果。
In order to analyze the local anti-seismic effect of deep foundation pit supporting and bearing structure under earthquake action in super high-rise building construction,a super high-rise deep foundation pit project is analyzed by using finite element software,and the finite element calculation model of deep foundation pit supporting and bearing structure in super high-rise building construction is established.The ground motion accelerations of 0.4g,0.5g and 0.6g are input by using the earthquake simulation shaking table.Compare the seismic effect of the bearing structure of the deep foundation pit support of the diaphragm wall with different construction stages and insertion ratios of the deep foundation pit,and explore the influence of the deformation effect of different seismic intensity on the displacement of the bearing structure of the deep foundation pit support.Using the vibration mode decomposition response spectrum method,the seismic stability effect of the bearing structure of the deep foundation pit support of super high-rise buildings is obtained.The test results show that in the deep foundation pit support of super high-rise residential buildings,the excavation depth and seismic intensity of the deep foundation pit are important factors affecting its seismic stability,and the insertion ratio is proportional to the seismic stability of the deep foundation pit support structure,and can effectively improve its seismic effectiveness.
作者
向苗
徐亮
王大庆
XIANG Miao;XU Liang;WANG Daqing(Hubei Construction Group No.3 Construction Engineering Co.,Ltd.,Wuhan 430076,Hubei,China)
出处
《建筑施工》
2023年第1期209-212,共4页
Building Construction
关键词
超高层建筑施工
深基坑
支护承压结构
抗震效果
super high-rise building construction
deep foundation pit
support bearing structure
anti-seismic effect
