Y形高强钢组合偏心支撑框架结构弹塑性层剪力分布研究

发布时间：2018-01-07 11:09

本文关键词：Y形高强钢组合偏心支撑框架结构弹塑性层剪力分布研究　出处：《建筑结构学报》2016年11期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:In order to study the elastoplastic shear force distribution of Y-HSS-EBF frame structure with Y-shaped high strength steel composite eccentrically braced frame. Four Y-HSS-EBF structures with different layers and ideal global yield model were designed and the finite element model of the shaking table test specimens of Y-HSS-EBF structure was established and verified. On this basis, the effects of structure layer number, velocity pulse effect of near-field earthquake and cumulative cyclic effect of far-field earthquake acceleration are considered. The shear distribution of Y-HSS-EBF structure in the near field of rare leveling and far field earthquake is obtained by nonlinear time-history analysis. Based on the bottom shear method of GB50011-2010 Code for Seismic Design of buildings, the elastic-plastic shear distribution model of Y-HSS-EBF structures is proposed. And compared with the existing shear distribution model, the results show that:. The velocity pulse effect of near-field seismic wave and the acceleration cycle effect of far-field seismic wave have great influence on the layer shear distribution of Y-HSS-EBF structure. The influence of the structure layer shear force distribution should be considered. The proposed laminar shear distribution model and the time history analysis result have the smallest error and the accuracy is better than the other layer shear distribution modes in this paper. It can be used as a reference for the performance-based design method of Y-HSS-EBF structure.
【作者单位】：西安建筑科技大学土木工程学院;西安建筑科技大学材料科学与工程博士后流动站;西安理工大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51178382)
【分类号】：TU398
【正文快照】： 0引言偏心支撑结构兼有中心支撑框架结构的刚度和纯框架结构的延性,是一种优良的抗震结构体系,国内外学者已对偏心支撑结构性能及设计方法进行了大量研究。石永久等[1]对耗能梁段为弯曲屈服型的偏心支撑钢框架进行了水平低周往复荷载的试验,研究其滞回性能,结果表明偏心支撑框

【相似文献】