非对称异型面剪力墙与筒体下的厚承台受力性能研究  

Study on load-bearing behaviors of deep pile cap under tube structures and shear walls with asymmetric special-shaped cross sections

作　　者：郭宏磊[1] 

机构地区：[1]江汉大学,湖北武汉430000

出　　处：《土木工程学报》2012年第11期121-133,共13页China Civil Engineering Journal

基　　金：国家自然科学基金(50878097);湖北省教育厅重点项目(D20083401);武汉市教育局重点项目(20070703)

摘　　要：进行非对称异型面剪力墙与筒体下的厚承台试验、有限元与理论研究;描述该种承台从弯曲到过渡直至冲切三个阶段的破坏情况,指出其为以冲切为主的弯冲破坏;阐述该种承台存在空间桁架传力机理;给出斜压杆端横截面面积的完整计算方法,并经承载力计算分析和试验结果的验证,证明其合理性;说明构建空间桁架传力体系的具体原则与方法;表明该种承台破坏属性中的应力集中现象及其不经济性。所得结论可对工程设计提供帮助。The experimental analysis, finite element and theoretical studies of the deep pile cap under the shear wall and tube structure with the asymmetric special-shaped cross section are conducted, in which the failure circumstances in the three stages from bending, transition until punching are described. It is pointed out that the main failure modes of this kind of deep pile cap is bending-punching failure with prevailing punching. Load transferring mechanisms of Spatial Strut-and-Tie （SST） is found in the deep pile cap and the complete calculation method of the strut end cross sectional area is put forward furthermore, the proposed method is validated by theoretical bearing-capacity calculation analysis and verification of experiments. The specific principle and method for constructing transfemng load system of SST are explained, the stress concentration phenomenon and diseconomy in the failure attribute of this kind of pile cap are clarified. The research results may aid the engineering design.

关 键 词：厚承台 空间桁架 冲切 非对称 异型面 

分 类 号：TU375[建筑科学—结构工程]