基于虚拟激励法的框架-摇摆刚架结构体系的动力可靠度研究  

Dynamic reliability of a RC frame with rocking of moment frames based on pseudo excitation method

作　　者：李慧[1] 刘迪[2] 杜永峰[1,2] 李春锋[2] 

机构地区：[1]西部土木工程防灾减灾教育部工程研究中心,兰州730050 [2]兰州理工大学

出　　处：《振动与冲击》2013年第23期170-174,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(50978130,51178211)

摘　　要：针对框架结构的受力特点,采用增设摇摆刚架的抗震设计方法。以某6层框架结构作为研究对象,建立结构体系的计算模型,并将状态空间与虚拟激励法相结合,求解结构的平稳随机响应;以所得随机响应计算框架-摇摆刚架体系的动力可靠度,探讨了多遇地震作用下不同刚度比的摇摆刚架对结构体系动力可靠度的影响。结果表明:通过增设不同刚度比的摇摆钢框架,可以有效降低结构体系各层及整体结构的条件失效概率,为工程设计和研究提供一些参考。Aiming at the mechanical characteristics of a RC frame structure, an aseismic design scheme of adding rocking of moment frames was adopted here. A 6-story RC frame was taken as a study object, the calculation model of the structure system added with rocking of moment frames was built, the state space analysis method and the pseudo excitation method were used to solve the stationary random response of the new structure system. The dynamic reliability of the RC structure with different stiffness ratios for rocking of moment frames under minor earthquake was discussed by using the dynamic reliability theory. The results showed that the conditional failure probability decreases under minor earthquake for both the whole structure system and each floor of the structure system, the results provide a reference for engineering design and study of such type structure systems.

关 键 词：摇摆刚架结构 虚拟激励法 动力可靠度 

分 类 号：TU352.1[建筑科学—结构工程]