框架柱托换节点承载力理论公式的研究  

STUDY ON BEARING CAPACITY THEORETICAL EQUATION OF FRAME COLUMN UNDERPINNING JIONT

作　　者：都爱华[1] 张鑫[1] 朱维申[2] 

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东大学岩土与结构工程研究中心,济南250011

出　　处：《工程力学》2011年第A01期162-166,共5页Engineering Mechanics

基　　金：国家"十一五"科技支撑计划"既有建筑物移位改造关键技术研究"项目(2006BAJ06A03-06)

摘　　要：该文依据16组框架柱双梁式托换节点的正交试验,得到了行走梁的跨高比、托换梁的箍筋配箍率、纵筋配筋率等因素对框架柱托换节点承载力的影响关系,通过对试验结果的分析,总结出框架柱托换节点的受力机理、破坏形态,并得出行走梁的跨高比是影响框架柱托换节点破坏形式的关键因素;并在此基础上通过理论分析将框架柱托换节点的界面破坏过程分为界面冲切滑动前和界面冲切滑动后两个阶段,针对界面冲切滑动前这一阶段提出了框架柱托换节点的空间"拉杆拱"力学模型,并对这一空间模型进行了受力分析,推导出了框架柱托换节点承载力的理论计算公式,并将理论结果与试验结果进行了对比,二者吻合较好。On the base of an orthogonal experiment of sixteen groups of frame column double beams underpinning joints,the three factor influence on the underpinning joint bearing capacity was studyed,the three factors included the ratio of span to height of a walking beam,the ratio of an underpinning beam stirrup steel bar,and the ratio of an underpinning beam longitudinal steel bar.Based on the experimental results,the underpinning joint mechanism and failuremodes were determined,and the conclusion was drawn that the ratio of the walking beam span to height was the key factor to the jiont bearing capacity;the failure course was divided into two stages before and after interface punching slip by theoretical analysis.For the stage before interface punching slip,a space ＂tension-bar-arch＂ mechanical model was presented for the frame column underpinning jiont,then mechanical analysis was put into the model,and the thereotical caculation formula for frame column underpinning joint was obtained.At last this thereotical results were compared to the experimental results,and the thereotical results were good agreement with experimental resuls.

关 键 词：平移技术 托换节点 受力性能 计算模型 理论公式 

分 类 号：TU746.4[建筑科学—建筑技术科学]