考虑撬力作用位置的T型连接初始刚度计算方法  

Theoretical Analysis of Initial Stiffness of T-Stubs Considering the Location of Prying Force

作　　者：强旭红[1] 武念铎 罗永峰[1] Qiang Xuhong;Wu Nianduo;Luo Yongfeng(College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《天津大学学报（自然科学与工程技术版）》2018年第12期1230-1237,共8页Journal of Tianjin University：Science and Technology

基　　金：国家重点研发计划资助项目(2017YFB0304701);国家自然科学基金资助项目(51408150);中央高校基本科研业务费专项资金资助项目(2014KJ044);财政部2013年施工新技术研究与开发项目(财企(2013)235号)~~

摘　　要：为考虑撬力作用位置对T型连接初始刚度的影响,更准确预测T型连接初始刚度,依据能量驻值原理推导出不考虑和考虑螺栓抗弯刚度时,T型连接撬力作用位置的预测公式,并给出了依据该公式确定普通钢和高强钢T型连接撬力作用位置的具体方法.在此基础上,给出了普通钢和高强钢T型连接初始刚度的计算流程.最后,采用该计算流程对一系列T型连接算例的初始刚度进行计算,并将理论计算和有限元模型计算结果进行对比.研究结果表明,理论与有限元模型计算结果的最大偏差在10%,以内,验证了撬力作用位置预测公式和T型连接初始刚度计算流程的合理性.In order to consider the influences of locations of prying forces on the initial stiffness of T-stubs and to predict the initial stiffness of T-stubs more accurately,the stationary value principle of energy is used to derive equations either considering bending stiffness of bolts or not,which can be employed to predict the locations of prying forces of mild and high strength steel T-stubs.Further,methods of using the equations to determine the locations of prying forces are presented.Based on the proposed equations and methods,the calculating procedure of initial stiffness of mild and high strength steel T-stubs is given.Finally,the calculating procedure is adopted to get the theoretical values of initial stiffness of a series of Tstubs,and comparisons between theoretical and numerical results of initial stiffness of the T-stubs are presented.Results show that the maximum deviation between the theoretical and numerical results is less than 10%.So the accuracy of the equations and the calculating procedure of initial stiffness of T-stubs presented in this paper are validated.

关 键 词：T型连接 高强钢 初始刚度 撬力作用位置 连续梁模型 

分 类 号：TU411.3[建筑科学—岩土工程]