不同桩型-高层建筑结构体系动力相互作用的对比分析  

The comparative research of the different piles-tall building structures system in dynamic interactions

作　　者：李辉[1] 钱德玲[1] 李金俸[1] 夏京[1] 李健全[1] 徐雁飞[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：《煤炭学报》2010年第7期1104-1108,共5页Journal of China Coal Society

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：基于分层土-支盘桩-高层框架结构相互作用体系的振动台试验,利用有限元分析软件MARC对支盘桩及直杆桩体系进行相同条件下的建模,并与试验结果对比验证了其合理性。经过对比分析,在x-z向地震波激励下,直杆桩-高层建筑结构体系的上部结构相对于支盘桩体系的位移、变形明显增大;两种体系上部结构的应力集中区域主要在一层柱底和各层梁柱搭接处,而在柱底与承台交界处最大;在柱底,支盘桩体系的剪应力值和应变值比直杆桩体系更大,很容易造成这个部位的局部破坏。计算结果表明:桩型改变时,高层建筑结构的动力反应有着较大的差异。Based on the shaking tables tests of layered soil-branch piles-high rise frame structure interaction system,the model of the branch piles and straight piles system was built with the MARC finite element software and its rationality was verifyed through comparision with test results.By comparison analysis,under the x-z direction earthquake wave stimulation,the displacement and deformation of the superstructure of the straight piles-tall building structure system increase more than the branch pile system.In the column-beam lapping and the first floor column base,it is distributed much stress in both branch and straight pile system.While the maximum appeared at the borderline of the column base and pile cap.In the column base,branch pile system has greater shear stress value and strain value than straight pile system and it can easily cause local damage in this position.The results show that tall building structure system dynamic response has great difference when pile type changing.

关 键 词：支盘桩 直杆桩 高层建筑结构 动力相互作用 振动台试验 

分 类 号：TU473[建筑科学—结构工程]