钢-混凝土混合结构体系屈曲模态判别标准及临界荷载简化算法-《建筑科学与工程学报》

文章信息/Info

Title:: Judgment Standard of Buckling Mode and Simplified Algorithm of Critical Load for Steel-concrete Mixed Structure System

Author(s):: LI Liang, LI Guoqiang; School of Civil Engineering, Chang’an University

Keywords:: steel-concrete mixed structure system; lateral resistance; critical buckling load; simplified mechanical model; finite element analysis

摘要:: 为了研究核心筒支撑作用对屈曲模态和屈曲临界荷载的影响，建立了钢-混凝土混合结构体系简化力学模型，并在大量有限元分析的基础上，研究了钢-混凝土混合结构体系中框架和支撑两部分之间的相对强弱关系对屈曲模态的影响。根据屈曲模态不同，将钢-混凝土混合结构体系划分为4种类型，归纳出可靠的屈曲模态判别标准，并提出了与各类屈曲模态对应的临界荷载简化算法。研究结果表明：该简化算法计算结果准确、可靠，可供设计人员采用。

Abstract:: In order to investigate the influence of the lateral resistance by the core tube on buckling mode and critical buckling load, the simplified mechanical model of the steelconcrete mixed structure system was established. Based on the finite element analysis, the influence of the relative relations of the frame and tube for steelconcrete mixed structure system on buckling mode were studied. According to the different buckling modes, the steelconcrete mixed structure system was categorized into four types, and the reliable judgment standard of buckling mode was summarized. Furthermore, the simplified algorithms of critical load corresponding to various buckling modes were put forward. The study results show that the calculation results of the simplified algorithm are accurate and reliable, can provide references for the designer.