地基刚度对L形带裙房高层建筑结构-基础-地基共同作用的影响  

Concurrent functional influence research of L-shaped podiums high-rise structure with different ground stiffness

作　　者：许翊[1] 张庆文[2] 刘德稳[2] 陈虎[3] 赖正聪[4] 苏何先[4] 

机构地区：[1]内江职业技术学院建筑工程系,四川内江641100 [2]西南林业大学土木工程学院,云南昆明650000 [3]西南交通大学土木工程学院,四川成都610000 [4]昆明理工大学土木工程学院,云南昆明650000

出　　处：《湖南科技大学学报（自然科学版）》2014年第2期62-65,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：云南省科技厅应用基础研究项目(2011FZ143);云南省省级森林工程特色专业基金(501035);云南省省级结构工程试验教学示范中心建设基金(501042)

摘　　要：建立了某实际工程L形带裙房高层建筑三维分析模型,采用分层地基模型模拟地基土,引入缝连接单元,对不设缝带裙房高层建筑进行了上部结构-桩筏基础-地基共同作用分析,主要讨论地基刚度的变化对上部结构和桩筏基础的影响,研究表明:竖向荷载作用下,当地基刚度增大时,上部结构中心区和翼缘区的边柱和角柱轴力减小,而中柱的轴力增大,趋向于非共同作用;主楼与裙房基础的平均沉降随着地基刚度的增加而减小,但当地基刚度增大到一定情况时影响减弱;主楼与裙房各自的沉降差也随地基刚度的增加而减小,减小幅度趋于平缓;随着地基刚度的增加,其桩顶反力曲线趋缓,也即桩顶反力逐渐变得均匀.The three -dimensional analytical model was built on L -shaped high -rise buildings with podium,adopts layered ground model to simulate subsoil,joint connection unit was introduced,a combined action analysis of upper-structure-piled raft foundation-ground was made on high-rise buildings that do not set up joint,the influence was discussed which of change of ground stiffness on upper structure and piled raft foundation.It is indicated in the research that axial force of side and corner pillars,that are separately located in flange and central area of upper structure,decreases,while axial force of central pillar increases and tends to be uncombined action under vertical load when ground stiffness increases.Average settlement of main building and podium foundation decreases with the increase of ground stiffness.But this influence declines when ground stiffness increases to a certain degree.Settlement difference of main building and podiums decreases slowly with the increase of ground stiffness.With the increase of ground stiffness,reaction curve of top of pillar tends to be slowly,meaning that reaction of top of pillar is gradually well-distributed.

关 键 词：L形带裙房的高层建筑 结构-基础-地基共同作用 分层地基 地基刚度 

分 类 号：TU973.23[建筑科学—结构工程]