往复荷载下带竖向阻尼器自复位墙滞回性能分析

发布时间：2018-01-14 04:10

本文关键词：往复荷载下带竖向阻尼器自复位墙滞回性能分析　出处：《工程力学》2017年03期 　论文类型：期刊论文

【摘要】：针对一种新型带竖向阻尼器自复位墙(VD-SCW)的受力特征,该文建立可用于VD-SCW滞回性能的等效纤维模型,并利用利用Perform-3D有限元软件对等效纤维模型进行分析,通过与已有自复位墙试验数据的对比,验证纤维模型的有效性。在此基础上,分析了阻尼器屈服力、阻尼器刚度和预应力筋张力控制应力等关键参数对VD-SCW滞回性能的影响,结果表明:阻尼器屈服力的增加会提高墙体启动力和耗能能力,但同时会使墙体卸载时的残余变形增大;过小的阻尼器刚度会明显降低墙体耗能能力,但增加到一定程度后对墙体耗能影响不明显;预应力筋张力控制应力的增加会提高墙体的启动力,但会导致预应力筋过早屈服,从而降低墙体的摇摆能力,但对其耗能能力影响较小。
[Abstract]:Based on the mechanical characteristics of a new type of VD-SCW with vertical damper, an equivalent fiber model for hysteretic performance of VD-SCW is established. The equivalent fiber model is analyzed by using the Perform-3D finite element software, and the validity of the fiber model is verified by comparing the experimental data with the existing self-reset wall test data. The effects of the key parameters such as the yield force of the damper, the stiffness of the damper and the tension control stress of the prestressed tendons on the hysteretic performance of VD-SCW are analyzed. The results show that the increase of the yield force of the dampers will increase the start-up force and the energy dissipation capacity of the wall, but at the same time, the residual deformation of the wall will increase when the wall is unloaded. Too small damper stiffness will obviously reduce the energy dissipation capacity of the wall, but when increased to a certain extent, the impact on the wall energy consumption is not obvious. The increase of tension control stress of prestressed tendons will increase the start-up force of the wall, but will lead to premature yield of the prestressed tendons, thus reducing the rocking ability of the wall, but has little effect on the energy dissipation capacity of the wall.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家自然科学基金项目(51208095) 中央高校基本科研业务费专项资金项目(3205003203) 江苏省“青蓝工程”资助项目江苏省2015年度普通高校研究生实践创新计划项目(SJLX15_0033) 建筑安全与环境国家重点实验室开放课题基金资助项目(BSBE2014-05)
【分类号】：TU352.1
【正文快照】： 随着基于性能抗震设计理念的发展,如何在地震发生后使建筑物具有良好的恢复功能引起了国际地震工程界的广泛关注[1],自复位结构也成为了近年结构抗震领域的研究热点,其类型包括:自复位支撑框架[2]、自复位框架节点[3]和自复位墙[4]等。其中,自复位墙(Self-centering wall,SCW)

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