非对称翼缘H型钢组合梁设计的若干关键因素  

Several key factors in design of H⁃shaped steel composite beam with asymmetric flange

作　　者：王建峰 虞终军 华怀宇 WANG Jianfeng;YU Zhongjun;HUA Huaiyu(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《建筑结构》2024年第1期1-8,共8页Building Structure

摘　　要：非对称翼缘H型钢组合梁是一种优化的组合梁形式,可以提高组合梁的截面抗弯效率,减小工程量,降低碳排量。对非对称翼缘H型钢组合梁的最优截面解析解、截面抗弯效率的影响因素、承载力有效性以及抗弯刚度进行研究。根据荷载分布情况可以确定组合梁施工阶段与使用阶段抗弯承载力比值的限值,由此可以得到满足限值的上翼缘厚度百分比区间,此区间内的抗弯承载力最大值点即为设计控制点。根据上述成果提出了全新的非对称翼缘H型钢组合梁截面设计策略。结合实际工程,对组合梁的经济性进行验证,结果表明,非对称翼缘H型钢组合梁的经济效益显著。H⁃shaped steel composite beam with asymmetric flange is an optimized composite beam form,which can improve the section bending efficiency of the composite beam,reduce engineering quantity and reduce the carbon emission.The analytical solution of optimal section,the factors affecting the section bending efficiency,the bearing capacity effectiveness and the bending stiffness of H⁃shaped steel composite beam with asymmetric flange were studied.According to the load distribution,the limit value of the ratio of the flexural capacity of the composite beam during construction and use phase can be determined,the percentage interval of the upper flange thickness meeting the limit value can be obtained,and the maximum point of the flexural capacity in this interval is the design control point.According to the above results,a new section design strategy of H⁃shaped steel composite beam with asymmetric flange was proposed.Combined with the actual project,the economy of composite beams was verified,and the results show that the economic benefit of H⁃shaped steel composite beam with asymmetric flange is remarkable.

关 键 词：非对称翼缘H型钢 组合梁 截面抗弯效率 优化设计 经济性 

分 类 号：TU398.9[建筑科学—结构工程]