摘要
梁端弹簧型自复位框架耗能节点是一种新型自复位节点形式.首先,介绍了梁端弹簧型自复位框架节点构造形式,建立了自复位耗能节点框架的有限元模型,分析了节点刚度弱化程度对框架结构动力特性的影响;其次,将10条基于地震信息的地震动记录方法所选择的地震动曲线输入有限元模型中,进行不同节点相对刚度比情况下结构的动力响应时程分析;最后,利用层间位移放大系数、基底减震系数,进行最优化节点刚度取值研究.分析结果表明:结构的减震系数β建议设计为0.40≥β≥0.27,节点相对刚度比取值范围建议为1.0≥S≥0.4.
Self-centering frame joint with beam-end spring is a new type of self-centering frame joint.The configuration of this self-centering frame joint is introduced,the finite element model of the self-centering frame is established and the influence of weakening the joint stiffness on dynamic characteristics of structure is analyzed.Then,ten ground motions which were selected based on earthquake platform are input into self-centering frame model to simulate the dynamic time-history responses of the structures with different joint stiffness ratios.Finally,the inter-story drift amplification coef-ficient and the base earthquake-reduction coefficient were obtained from the time-history dynamic analysis to research reasonable range of joint stiffness ratio.The analytical results show that the base earthquake-reduction coefficient is 0.40 to 0.27 and the reasonable range of the joint relative stiffness ratio is 0.4 to 1.0.
作者
鲁亮
汪磊
胡宇飞
Lu Liang;Wang Lei;Hu Yufei(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China;Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.Shanghai 200092,China)
出处
《动力学与控制学报》
2020年第5期22-28,共7页
Journal of Dynamics and Control
基金
国家重点研发计划(2016YFC0701101)
国家自然科学基金项目(51678453)。
关键词
自复位框架
节点弹簧
节点刚度
时程分析
有限元模型
self-centering frame
joint spring
joint stiffness
time-history analysis
finite element model
