摘要
由于现有的国内外规范对于方支管-H型钢弦杆T形节点中弦杆翼缘屈曲考虑欠缺,从而引起了相关设计人士的重视。基于阿布扎比国际机场中拱桁架的多尺度模型,对桁架中方支管-H型钢弦杆T形节点的弦杆屈曲进行了有限元分析。研究表明:弦杆上远离与方管焊接处一侧的翼缘趋向于受压应力作用,更容易发生屈曲。当压应力较大时,该侧翼缘的屈曲呈现波浪型。对拱桁架中的方支管-H型钢弦杆T形节点的弦杆局部屈曲进行设计时,根据弦杆上远离与方管交接处一侧的翼缘的屈曲形态来布置加劲肋是比较合理的选择。
It is the lack of the specifications existing on the design of buckling for T-joints assembled by square hollow section brace and H-section chord that attract the attention of the relevant design community. The multi-scale model for the arch truss of Abu Dhabi International Airport was used to conduct the finite element analysis of the buckling of square hollow section brace and H-section chord T-joint. The results showed that the chord flange far from the welded point tended to be subjected to compressive stress and was more prone to buckling. When the compressive stress became larger,the buckling of the flange was shown as a wavy line. The design for the buckling of the T-joint should be based on the buckling status of the flange of the chord,so as to arrange the stiffeners rationally.
出处
《钢结构》
北大核心
2016年第8期54-57,共4页
Steel Construction
关键词
多尺度模型
屈曲分析
节点
multi-scale model
buckling analysis
joints
