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为研究Y形高强钢组合偏心支撑框架结构(Y-HSS-EBF)的弹塑性层剪力分布,设计了4个不同层数且具有理想整体屈服模式的Y-HSS-EBF结构,同时建立了Y-HSS-EBF结构振动台试验试件的有限元模型并进行了验证,在此基础上考虑了结构层数、近场地震的速度脉冲效应以及远场地震加速度累积循环效应的影响,通过非线性时程分析获得了Y-HSS-EBF结构在罕遇水准近场、远场地震下层剪力分布,基于GB 50011—2010《建筑抗震设计规范》的底部剪力法提出了Y-HSS-EBF结构弹塑性层剪力分布模式,并与现有层剪力分布模式进行了对比。结果表明:近场地震波的速度脉冲效应以及远场地震波的加速度循环效应对Y-HSS-EBF结构的层剪力分布影响较大,应考虑其对结构层剪力分布的影响;建议的层剪力分布模式与时程分析结果的误差最小,在精度上优于文中其他层剪力分布模式,可以为Y-HSS-EBF结构基于性能的设计方法提供参考。
In order to study the shear distribution of Y-HSS-EBF elastic-plastic layer, four Y-HSS-EBF structures with different total number of layers and ideal total yield mode were designed. At the same time, Y-HSS-EBF structure of the shaker test specimen finite element model and verified, on this basis, taking into account the structural layers, velocity pulse effect of near-field earthquakes and far-field seismic acceleration cumulative cycle effect, through the non- Y-HSS-EBF was proposed based on the linear shear-time analysis of the bottom shear of the Y-HSS-EBF structure in the near-field and far-field earthquakes with a rare level. Based on the bottom shear method of GB 50011-2010 “Code for seismic design of buildings” The shear-stress distribution of the structural elastic-plastic layer is compared with that of the existing layer. The results show that the velocity pulse effect of near-field seismic waves and the acceleration cyclic effect of far-field seismic waves have a great influence on the layer shear distribution of Y-HSS-EBF structure. The influence of shear wave distribution on shear distribution should be considered. The error between the force distribution model and the time-history analysis is the smallest, which is superior to other shear-stress distribution models in accuracy. It can provide a reference for performance-based design of Y-HSS-EBF structure.