【作者】 叶志雄； 邱剑；

【Author】 Ye Zhixiong,Qiu Jian(Wuhan Architectural Design Institute,Wuhan 430014,China)

【机构】 武汉市建筑设计院；

【摘要】 钢结构广泛地用于各种复杂的建筑工程中,在复杂荷载作用下,某些钢构件受扭不可避免,而设计院常用钢结构设计软件均没有考虑钢构件受扭引起的应力,现行国家规范《钢结构设计规范》(GB50017—2003)中也没有规定钢构件的抗扭计算方法。不考虑钢构件的受扭可能导致部分杆件的失效,甚至引起整个结构的破坏,给安全造成极大的隐患。本文基于薄壁杆件的受扭理论,总结出了剪、弯、扭共同作用下各种截面的应力计算和强度稳定验算公式。并提出了扭剪比的概念,通过在常用设计软件中查看钢构件的应力比、扭剪比,即可方便地初步判断构件所受的扭矩是否危险。本文的研究结论可供广大钢结构设计人员参考。更多还原

【Abstract】 The steel structure is widely used in a variety of complex building projects,under the complex loads,some steel members subject to torsion is inevitable,and the design software for steel structure which commonly used by design institute did not consider the stress caused by the torsion.The current national standard Code for design of steel structures also did not provide design formulas for steel members torsion calculation.Without regarding the torsion of steel components may lead to some bars failure,even lead to the destruction of the entire structure,causing great hidden danger to security.Based on thin-walled beam torsion theory,the stress and strength calculation formula for various sections under cutting,bending,twisting were summed up together.Then the concept of torsional shear ratio was put forward.Through lookup the stress ratio,torsional shear ratio of steel members in design software,it can be easily determined whether the elements of risk under torsion,whether the need for further checking.更多还原