摘要
采取从组件到整体结构的分析方法,对一栋两层冷弯薄壁型钢龙骨体系房屋振动台试验足尺模型的抗震性能进行非线性动力分析研究。利用自攻螺钉连接的恢复力模型和精细化的剪力墙数值模型,得到房屋模型中各剪力墙的恢复力特性,建立带非线性弹簧支撑的简化剪力墙宏观模型。结合各剪力墙的恢复力特性,采用刚性横隔板的假定,确立冷弯薄壁型钢低层龙骨体系房屋结构的动力分析数值模型。分析结果表明:非线性动力分析所得整体结构的动力反应与试验结果吻合较好。在此基础上,通过对结构阻尼比的参数分析,并与房屋整体模型的振动台试验结果的比较,得到结构阻尼比的合理取值范围;最后讨论了线性动力分析对该体系房屋抗震性能分析的适用性,可供工程应用参考。
A nonlinear dynamic analysis study on seismic behavior of a two-story cold-formed thin-walled steel framing building full-scale test model was carried out by the way of from components to integral structure. Restoring force behaviors of all framing shear walls of the shaking table test building were obtained based on the refined numerical framing shear wall model and restoring force model of tapping screw connections. Then,a dynamic munerical model of low-rise cold-formed thin-walled steel framing building was established based on the simplified shear wall model with nonlinear bracing and assumption of rigid diaphragm,and nonlinear dynamic analysis was carried out. The results of FEA agree well with the tests. Also,values range of damping ratio was proposed based on the parametric analysis of damping ratio and the comparison of FEA and shaking table tests. Finally,the application of linear dynamic analysis is investigated,and suggestions are offered.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2014年第5期40-47,共8页
Journal of Building Structures
基金
国家自然科学基金项目(50878168)
