平板柱脚对钢柱转动约束性能的试验研究  

Experimental research on rotational constraints of plated column base to steel column

作　　者：王先铁[1] 郝际平[1] 申宇杰[1] 罗古秋[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2013年第3期361-366,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：<钢结构设计规范>修订课题;国家自然科学基金资助项目(51108369);陕西省教育厅专项科研项目(11JK0942)

摘　　要：对于平板柱脚轴心受压柱,《钢结构设计规范》将柱脚当作铰接看待,不考虑其转动约束作用.研究表明,钢结构平板柱脚具有较大的转动刚度.为研究钢结构平板柱脚对钢柱的转动约束作用,对10个采用平板柱脚的H型钢柱进行了试验研究,分析了锚栓数量、底板厚度及柱子长细比等因素对柱脚转动约束性能的影响,得到了柱脚弯矩-转角曲线和柱脚转动刚度.提出了平板柱脚转动刚度计算公式,得出了柱子计算长度系数的近似计算公式.In the Code for Design of Steel Structures,the plated column base of steel column is considered as ideal hinged constraint,but the rotational restraint of the column base is not.The research results show that the plated column base of steel column has considerable rotational constraint.To research the rotational constraint of column base,experimental research was conducted for 10H-section columns with plated column bases of steel column.The moment-rotation curves of the column bases,the rotational rigidity of the plated column bases were obtained.The formulas of the rotational rigidity of the plated column base of steel column were proposed according to the experimental results,and the approximate formula of the effective length factor was obtained.

关 键 词：平板柱脚 约束 试验研究 转动刚度 计算长度系数 

分 类 号：TU311.2[建筑科学—结构工程]