剪切连接件的受力机理理论分析与试验验证  

THEORETICAL STUDY AND EXPERIMENTAL VERIFICATION OF THE MECHANICAL MECHANISM OF SHEAR LINK DEVICES

作　　者：李宗京[1] 舒赣平[1] LI Zong-jing;SHU Gan-ping(School of Civil Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《工程力学》2018年第12期63-70,80,共9页Engineering Mechanics

基　　金："十二五"国家科技支撑计划项目(2012BAJ13B01);江苏省普通高校研究生科研创新计划项目(CXZZ13-0108)

摘　　要：基于剪切连接件(SLD)的典型构造建立力学模型,应用弹性力学半逆解法对其腹板的应力分布进行求解,并对剪切连接件的初始刚度K、屈服后刚度K?、屈服荷载Fy、屈服位移uy等关键性能指标进行了理论分析。针对以往屈服点确定方法存在的不足,提出了一种基于Bouc-Wen模型和模拟退火算法的等效屈服点确定方法。最后采用单调拟静力加载试验进行验证。研究结果表明:剪切连接件腹板应力分布和各项力学性能指标的理论解与有限元分析结果及试验实测结果吻合较好;该文提出的屈服点确定方法能够有效识别剪切连接件的相关力学性能指标,且拟合曲线与单调加载试验曲线良好吻合。理论分析成果将为剪切连接件的工程设计、性能评估及后续研究提供理论参考。Based on the classical construction details of shear link devices （SLDs）, a mechanical model was built. The semi-inverse method in elastic mechanics was adopted to study its stress distribution pattern. The initial stiffness K, post-yield stiffness K＇, yield force Fy and yield displacement uy were also studied theoretically. Due to deficiencies of conventional methods for identifying the yield point, a new method based on the Bouc-Wen model and simulated annealing was proposed to identify the equivalent yield point of shear link devices. Finally, a quasi-static monotonic loading test was carried out for verification. The results demonstrate that the stress distribution in the web plate and the mechanical performance parameters calculated by the analytical solution comply with the finite element analysis results and the test results. The proposed method can effectively identify the equivalent yield point and corresponding mechanical performance parameters of the shear link device, and the simulated force-displacement curve fits well with the monotonic test curve. The results of the study may provide effective reference for the design, evaluation and further research of shear link devices.

关 键 词：剪切连接件 弹性力学 屈服点 BOUC-WEN模型 试验验证 

分 类 号：TU352.11[建筑科学—结构工程]