矩形管截面塑性极限承载力相关关系  

Sectional Capacity of Rectangular Hollow Section under Combined Loading

作　　者：贾良玖[1] 陈以一[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2009年第6期24-28,共5页Structural Engineers

基　　金：国家自然科学基金资助项目(50578117)

摘　　要：随着钢管加工制作工艺的发展,矩形钢管结构的应用也越来越普及。因此,对矩形钢管截面在复杂内力下的极限承载力相关关系的准确了解就显得很有必要。简述了矩形截面钢管极限承载力的研究现状,对矩形管截面塑性极限状态下的弯矩-剪力相关关系进行了推导,并通过有限元参数分析,以截面高跨比和腹板-翼缘面积比为参数,分析了剪力对矩形管截面极限弯矩的影响。最后,给出了轴力、弯矩、剪力和扭矩共同作用下矩形管截面的极限承载力相关关系表达式,并绘制了可供结构设计使用的复杂内力下的极限承载力相关曲面。As the development of techniques of manufacture and fabrication for steel tubes, rectangular hollow sections are used more and more widely. Therefore,it is necessary to get a better understanding on the ultimate interaction relationship for Rectangular Hollow Section （RHS）under combined loading. Previous researches on ultimate strength of typical sections were briefly summarized. The interaction relationship for RHS subjected to combined moment and shear force was deducted. A parametric analysis was taken to investigate the effect of shear force on the ultimate moment resistance with the consideration of height-span ratio and web-flange area ratio. Finally,general interaction relationships for RHS subjected to combined axial forces,uniaxial moments, torques and uniaxial shear forces were developed. And ultimate surfaces for RHS sections under combined loading were plotted to facilitate the structural design.

关 键 词：矩形管截面 极限承载力 相关关系 跨高比 剪切承载力 

分 类 号：TU392.3[建筑科学—结构工程]