美国标准组合工字形受弯构件侧向屈曲承载力研究  

Research on Lateral-torsional Bucking of Built-up I-shaped Sections Flexural Member Under American Code

作　　者：孙洪宇 张宏涛 赵立冬 孙铭婧 SUN Hongyu;ZHANG Hongtao;ZHAO Lidong;SUN Mingjing(Northeast Electric Power Design Institute Company Limited of China Power Engineering Consulting Group.Changchun 130021,China;Huaneng Hegang Power Generation Company Limited,Hegang 154109,China)

机构地区：[1]中国电力工程顾问集团东北电力设计院有限公司,长春130021 [2]华能鹤岗发电有限公司,黑龙江鹤岗154109

出　　处：《吉林电力》2021年第4期34-37,共4页Jilin Electric Power

摘　　要：侧向屈曲极限状态作为美国标准AISC 360-16-2016《钢结构设计标准》中规定的钢结构受弯承载力极限状态中的一种,是构件发生失稳破坏的常见模式,其影响因素除构件材料属性和截面尺寸外,更与构件受压翼缘侧向无支撑长度直接相关。对AISC360-16-2016钢结构组合工字形截面受弯构件的侧向屈曲承载力进行研究,按照腹板的截面类型不同,对其侧向屈曲承载力及塑性无支撑长度的计算进行分类,得出其关键影响因素及控制措施,结合STAAD.Pro钢结构设计软件,完善了构件设计后处理过程中检验参数的指定,并对设计优化措施提出一些建议。As one of the ultimate bearing capacity states of steel structure members under inspection in American standard AISC 360-16-2016 Steel Structure Design Standard,lateral-torsional bucking limit state is a common mode of instability failure of members.Its influencing factors are directly related to the laterally unbraced length of members except the attributes of section size and properties.The key influencing factors and control measures are obtained by studying the lateral-torsional bucking of flexural members of AISC 360-16-2016 steel structure,also the calculations of lateral-torsional bucking and yielding unbraced length are classified according to different sections of web.In combination with STAAD.Pro steel structure design software»the test parameters are perfected in the post-processing of the design,and put forward some suggestion on the optimization measures of structure design.

关 键 词：双轴对称组合工字形截面 侧向扭转屈曲承载力 扭转屈曲修正系数 侧向无支撑长度 后处理检验参数 

分 类 号：TU312[建筑科学—结构工程]