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ANALYSES OF VERTICAL EARTHQUAKE RESPONSES OF THE MEGA-BEAM FLOOR IN THE VIBRATION-ABSORPTION STRUCTURE WITH LARGE TUNED MASS RATIO
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摘要: 基于随机振动分析方法对大调谐质量比减振结构及普通巨型框架结构中巨梁层竖向地震响应问题进行探讨，并从实际构造的角度为解决大跨度巨梁层竖向动力响应过大问题提供设计建议。研究结果表明：巨梁层上最大竖向地震响应分布于中段附近；巨梁层于建筑上的位置越高，其竖向地震响应越大；相比其他巨梁层，大跨度巨梁层竖向地震响应同比增大；在大跨度巨梁层上设置子框架可对该巨梁层竖向地震响应起到抑制作用。Abstract: Some problems of the vertical earthquake responses of the mega-beam floor in both the vibration-absorption structure with large tuned mass ratio and the common mega frame are discussed based on random vibration theory,and some design advices from practical conformation are provided for resolving the excessive dynamical responses of the large-span mega-beam floor.The results indicate: the maximal vertical earthquake response of the mega-beam floor is located around its middle part;the vertical earthquake response of the mega-beam floor is increasing with its location in the heightened structure;the vertical earthquake responses of the large-span mega-beam floor with a sub-frame,are depressed.
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Key words:
- large tuned mass ratio /
- mega-beam floor /
- vertical earthquake response
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蓝宗建, 田玉基, 曹双寅.巨型框架多功能减振结构体系的减振机理及其减振效果分析[J].土木工程学报, 2002, 35(6):1－5; [2] 王肇民, 邓红洲, 董军.高层巨型框架悬挂结构体系抗震性能研究[J].建筑结构学报, 1999, 20(1):23－30; [3] 张耀华, 梁启智, 付赣清.巨型框架悬挂体系抗震原理及初步设计方法[J].工程力学, 2000, 17(2):10－17; [4] 邓志恒, 秦荣, 谢肖礼.悬挂阻尼控制结构体系巨型框架地震反应分析[J].世界地震工程, 2001, 17(3):80－84; [5] Chai Winston, Feng Q Maria.Vibration Control of Super TallBuildings Subjected to Wind Loads[J].International Journal ofNon-Linear Mechanics, 1997, 32(4):657－668; [6] 连业达, 张洵安, 薛荣刚.非平稳竖向地震下巨型框架承坐式减震结构动态特性研究[J].西北工业大学学报, 2009, 27(5):171－175. -
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