钢桁架连梁非线性有限元分析  

Nonlinear finite element analysis on steel truss coupling beam

作　　者：刘其舟[1] 林倩[1] 徐冬晓[1] 邓志恒[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004

出　　处：《四川建筑科学研究》2012年第4期19-22,30,共5页Sichuan Building Science

基　　金：国家自然科学基金项目(50868001)

摘　　要：考虑混凝土和韧性金属损伤塑性模型,对钢桁架连梁的受力性能进行了非线性有限元分析。通过试验研究与理论分析的对比,表明本文的非线性有限元分析方法具有较高的精度。通过本文的参数分析表明:只有在增强弦杆和腹杆的同时使两者相互匹配,才能保证结构承载力和延性的提升,单纯增强弦杆或腹杆可能导致结构受力的不协调,增加直腹杆能有效的提高结构的极限承载力。In this paper,concrete and ductile metal plastic damage model was considered, and nolinear FEA method was carried on to analyze the mechanical property of steel truss coupling beam. Through the comparation of experimental and theoretical analysis results, the nonlinear finite element analysis method shows high precision. In this paper, parameter analysis shows that only in strengthening chord and web member while make both mutual matching, can assure increasing the bearing capacity and ductility of the structure, only enhancing chord or web member may cause inharmonious structure stress, but increasing horizontal web members can effectively improve the ultimate beating capacity of the structure.

关 键 词：钢桁架连梁 非线性有限元分析 极限承载力 

分 类 号：TU398[建筑科学—结构工程]