鲁亮1?覮,夏婉秋1 ,樊宇2.柱端铰型受控摇摆式RC框架节点刚度取值研究[J].湖南大学学报:自然科学版,2019,(7):27~34
柱端铰型受控摇摆式RC框架节点刚度取值研究
Study on Selection of Joint Stiffness for a Controlled RockingReinforced Concrete Frame with Column-end-hinge Joints
  
DOI:
中文关键词:  柱端铰  受控摇摆框架  节点刚度  动力时程响应
英文关键词:column-end-hinge joint  controlled rocking frame  joint stiffness  dynamic time-history response
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作者单位
鲁亮1?覮,夏婉秋1 ,樊宇2 (1.同济大学 结构防灾减灾工程系上海 2000922.南京世茂房地产开发有限公司江苏 南京 210015) 
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中文摘要:
      柱端铰型受控摇摆式钢筋混凝土框架(CR-RCFC)是一种新型可恢复功能结构. 首先介绍CR-RCFC结构节点构造形式,以及常规框架结构、CR-RCFC结构的ABAQUS有限元模型,并对比振动台试验结果验证CR-RCFC有限元建模的合理性. 利用基于站台和地震信息的地震动记录选取方法选取10条地震动曲线,输入到CR-RCFC有限元模型中,模拟不同节点刚度比下结构的自振频率和动力时程响应. 最后定义层间位移放大系数α和基底减震系数β,并选取层间位移响应和基底剪力响应作为最优抗侧刚度的控制参数. 对CR-RCFC结构进行弹塑性时程分析,比较结构在不同地震动作用下的结构层间位移和基底剪力响应,分析节点刚度对层间位移放大系数α和基底减震系数β的影响,求得满足抗震设计要求的节点相对刚度比取值范围.
英文摘要:
      A Controlled Rocking Reinforced Concrete Frame with Column-end-hinge joints (CR-RCFC) is a new type of resilient structure. Firstly, the configuration of CR-RCFC joint was introduced. The ABAQUS software was used to establish the finite element model of the conventional RC frame (RCF) and CR-RCFC. The rationality of the finite element model of CR-RCFC was verified by shaking table test results. Ten ground motions were selected based on earthquake platform and seismic information and input into CR-RCFC model to simulate the natural frequencies and dynamic time-history responses of the structures with different joint stiffness ratios. Finally, the inter-story drift amplification coefficient α and the base earthquake-reduction coefficient β were defined, and the displacement responses and inter-story shear responses were selected as the control parameters for selecting the joint stiffness. Through the elasto-plastic time-history analysis, the peak inter-story drifts and peak inter-story shear forces of the structure under different ground motions were compared to analyze the effects of joint stiffness degradation on the coefficients α and β, and reasonable range of joint stiffness ratio was obtained.
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