超高层斜交网格筒体结构减震设计研究

Research on earthquake-reduction design of super high-rise diagrid tube structures

以云南省某超高层斜交网格筒体结构为工程背景,对斜交网格筒体结构进行减震设计研究。通过在原斜交网格筒体结构设置黏滞阻尼伸臂桁架、在斜交网格斜撑位置附加黏滞阻尼支撑以及在上部分叉巨柱间设置黏滞阻尼器,形成斜交网格减震结构。分别对比研究了该减震结构的减震效果、不同地震输入方向下结构的附加阻尼比取值、阻尼器参数的优化以及减震结构在罕遇地震作用下的抗震性能。分析结果表明:斜交网格减震结构具有良好的减震效果;在罕遇地震下,该结构表现出良好的抗震性能。

A super high-rise diagrid tube structure in Yunnan province was took as an example,seismic-reduction design of the diagrid tube structure was studied.A kind of passive energy dissipation diagrid tube structure with viscous damping outrigger trusses and supplemental viscous dampers at the location of diagonal brace in the diagrid tube and viscous dampers added between the upper bifurcated giant columns was proposed.Seismic reduction effect of the structure,the additional damping ratio of the structure under different seismic input directions,the optimization of damper parameters and the seismic performance of the structure under rare earthquakes were analyzed.The results show that the passive energy dissipation diagrid tube structure has good seismic reduction effect,and the structure shows good seismic performance under rare earthquakes.