厚承台受力机理研究  

Study on Load Mechanism of Thick Pile Caps

作　　者：郭宏磊[1] 丁大钧[2] 王元汉[1] 

机构地区：[1]华中科技大学土木工程与力学学院 [2]东南大学土木工程学院,江苏南京210096

出　　处：《郑州大学学报（工学版）》2004年第1期22-27,44,共7页Journal of Zhengzhou University（Engineering Science）

基　　金：江苏省科技厅应用基础基金资助项目(BJ97024);湖北省自然科学基金资助项目(2003ABB025)

摘　　要：为揭示厚承台的传力机理和破坏形式,通过对4个1∶5比例的六桩厚承台的模型试验研究与三维非线性有限元ADINA的后处理研究,指出中国建筑桩基技术规范JGJ94-94与美国钢筋砼房屋建筑规范ACI318-02规范中,承台以弯曲强度进行配筋计算的设计方法之不足,揭示出厚承台的破坏模式是冲切破坏,传力机理是以带有主要单向压应力的砼区域作斜压杆,桩顶区域的纵筋作拉杆的空间桁架.　In order to reveal load mechanism and failure mode of thick pile caps,by means of the test of 1/4-scale models of thick pile caps with six piles and post-handling study of 3-dimensional non-linear finite element ADINA, this paper points out the shortage, which is that the design of pile caps is carried out by flexural strength in Chinese technical code for building pile foundations JGJ94-94 and American reinforcement concrete building construction code ACI318-02, promulgates that the failure mode of thick pile caps is punching failure and load transfer mechanism is the strut-and-tie,which is that zones of concrete with primarily unidirectional compressive stresses are modeled by compress struts,while tension ties are used to model longitudinal reinforcement over pile.

关 键 词：厚承台 受力机理 空间桁架 传力机理 桩基 

分 类 号：TU473.1[建筑科学—结构工程]