混合控制消能减震伸臂桁架上海中心抗震性能研究

发布时间：2018-01-09 01:33

本文关键词：混合控制消能减震伸臂桁架上海中心抗震性能研究　出处：《振动与冲击》2016年21期 　论文类型：期刊论文

【摘要】：在超高层建筑结构体系中,相对于传统伸臂桁架,新型消能减震伸臂桁架能显著提高结构的抗震性能,但同时也存在一些不可避免的问题。屈曲约束支撑伸臂桁架在小震下仅提供刚度不耗能,在中震下屈服耗能有限;黏滞阻尼伸臂桁架因黏滞阻尼器自身最大阻尼力限制,在中震和大震下对结构侧移控制效果不佳。混合控制消能减震伸臂桁架结构综合利用多种消能构件,同时为结构提供足够刚度和附加阻尼,具有更为全面的抗震性能。本文以上海中心为研究背景,研究了混合控制消能减震伸臂桁架结构在各烈度地震作用下的消能减震效果,同时探讨了黏滞阻尼伸臂桁架与屈曲约束支撑伸臂桁架相对数量变化对结构抗震性能产生的影响。将为消能减震伸臂桁架超高层结构体系的进一步研究和应用提供借鉴。
[Abstract]:Compared with the traditional cantilever truss, the new energy dissipation and extension arm truss can significantly improve the seismic performance of the super-tall building structure. But at the same time, there are some unavoidable problems. The buckling restrained bracing truss can only provide stiffness and energy consumption under small earthquake, and yield energy consumption is limited under moderate earthquake. Due to the limit of the maximum damping force of viscous dampers, the viscous damping truss has poor control effect on the lateral displacement of the structure under moderate and strong earthquakes. The hybrid control of energy dissipation and extension arm truss structures synthetically utilizes a variety of energy dissipation members. At the same time, it provides enough stiffness and additional damping for the structure, and has more comprehensive seismic performance. In this paper, the energy dissipation and damping effect of hybrid control energy dissipation and extension arm truss structures under the action of various intensity earthquakes is studied. At the same time, the influence of the relative quantity change of viscous damping extension truss and buckling restrained bracing arm truss on the seismic behavior of the structure is discussed. The further research and application of the energy dissipation and extension arm truss system are proposed. For reference.
【作者单位】：同济大学土木工程防灾国家重点实验室;中国电力工程顾问集团中南电力设计院有限公司电网工程公司;
【基金】：国家自然科学基金(51322803) 上海市曙光计划项目(14SG19)
【分类号】：TU973.31
【正文快照】： 传统伸臂桁架体系能很好的增加结构的抗侧刚度,减小顶部侧移和底部倾覆弯矩[1]。然而伸臂桁架的刚度在给结构带来有利作用的同时,也给结构带来不利的作用。由于伸臂的刚度作用,在伸臂桁架设置的楼层处,核心筒有着明显的内力突变[2],改变了力流路径,给结构带来潜在薄弱层,成为

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