扭剪作用下钢管支架直角扣件受力性能试验分析研究  

Analysis and research of testing about right-angle fastener of steel pipe support on the mechanics properties under torsional force and shear force

作　　者：何夕平[1] 朱坤[1] 陈燕[1] 常东明[1] 梁义 

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601 [2]中国十七冶集团有限公司,安徽马鞍山243001

出　　处：《西安建筑科技大学学报（自然科学版）》2016年第1期47-51,57,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：安徽省科技攻关计划项目(1501041133);安徽省教育厅高等教育振兴计划项目(2013zdjy121);安徽省教育厅质量工程项目(2014gxk063)

摘　　要：通过构造6组直角扣件连接节点试件,进行了连接节点同时承受扭转力和滑移力的试验.试验结果表明:扣件紧固力矩越大,扣件连接节点的初始抗扭刚度越大;不同紧固力矩的扣件连接节点,在较小的扭剪作用下,其初始扭转刚度变化不大,当试件受扭剪作用逐渐增大时,紧固力矩大的直角扣件抵抗变形的能力增强.通过统计回归分析,得出直角扣件连接节点初始扭转刚度与紧固力矩的关系,以及扭转力矩与杆件转角关系.调整了钢管支架连接节点考虑扭剪效应时无侧移和有侧移架体立杆的计算长度系数,并与纯扭效应下的计算值进行了对比分析,得出扭剪同时作用下更不利于钢管支撑架体的稳定.By constructing six test-pieces of right-angle fastener,a test with torsional force and slip force was carried out.The test results show the greater fastener tightening torque produce,the greater joint initial anti-torsional rigidity.When the torsional force and slip-shear force are smaller,the joint initial anti-torsional rigidity is almost equal for different fastener tightening torque.But the increasing of torsional force and slip-shear force,the right-angle fastener is stronger to resist deformation along with a bigger fastener tightening torque.Through statistical analysis of the test data,this paper obtains the formula between initial torsional rigidity of the right-angle fastener and fastener tightening torque and between torsional torque and member corner.This paper considers the joint torsional-shear effect,and adjusts the formula to calculated the length coefficient of scaffolding vertical rod about lateral displacement or not,and compares the length coefficient of scaffolding vertical rod with only considering the joint torsional effect.It will not be good for stability on steel pipe support under torsional force and shear force at the same time.

关 键 词：扭剪作用 抗扭刚度 紧固力矩 计算长度系数 

分 类 号：TU731.2[建筑科学—建筑技术科学]