钢框架圆管柱梁节点域的抗剪承载力

Shear Resistance of Panel Zone of Frame Joint Connecting CHS Column and H Steel Beams

本文根据薄壁杆结构理论对钢框架圆管柱梁节点域的应力分布规律进行了分析,并利用有限元软件对理论分析结果做了验证。推导了此类节点的节点域剪切屈服承载力和极限承载力的计算公式。以左右两侧工字形梁截面同高的平面框架节点为基本模型,推广了左右梁截面不等高的平面框架节点、两框架方向垂直且各梁截面等高的空间框架节点、两框架方向不垂直或框架方向多于两个的空间框架节点以及各梁截面不等高的空间框架节点等多种情况下的节点域承载力验算公式。公式经简单的调整后同样可适用于相同类型的工字形、箱形和十字形柱钢框架节点。

The stress distribution in the panel zone of circular hollow section （CHS） column and H steel beam joint in moment resistant steel frame is analyzed according to the assumption of thin walled structures,and the results are checked by the FE analysis. The yield capacity and ultimate of the joint against shear force are deduced according to a typical joint model in plane frame with the identical beam height on two sides. Then the other cases are discussed, including the unequal beam height on two sides of joint in plane frame, identical beam height connecting to the joint in three dimensional frame with perpendicular plane frames or two or more lean frames. It is shown that by simple change, the formulas of shear capacity of circular joint panel zone can be used in H steel column, box section column and cross section column.