空间钢管混凝土节点与空钢管节点应力集中分析

A Theoretical Analysis for Both Spatial Joints of Concrete-filled Steel Pipe Tubular and Hollow Steel

钢管结构具有承载力高、塑性和韧性好、制作和施工方便、经济性好等优点一直备受青睐.近年来钢管混凝土结构在桥梁工程中得到广泛应用,无论是空钢管节点还是钢管混凝土节点,管节点的设计成为一个非常重要的研究课题.直接焊接管节点是目前广泛应用的一种管节点形式,它是由几个主支管交汇而成的三维空间薄壁结构,其应力分布十分复杂.基于此,采用有限元软件ANSYS,选取常用三种典型节点形式,分析主支管管径比和主支管夹角两个参数对两类节点构件应力集中系数的影响.

The steel tubular structure is adopted widely nowadays It is of high load-carry capacity,good at plasticity and malleability,easy to execute and construct,excellent in fire resistance and economy.Recently,the concrete-filled steel tubular structure is adopted widely in bridge engineering,The designing of tubular joint both in Concrete-filled steel pipe tubular and hollow steel is a very important subject for various tubal structures.The directly welded interpenetrating tubular joint which is widely used is spatial thin-wall entity composed of several braces and chords.Therefore,its distribution of stress is very complicated.As a consequence of this situation,in this paper,with help of the software ANSYS,effects of both ratio of diameter and angle of braces and chords on stress concentration factor of tubular joints are studied through finite element analysis of three typical directly welded interpenetrating tubular joints.