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海口某超限高层黏滞阻尼器型伸臂桁架减震性能对比分析
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摘要
采用设置减震层框架核心筒伸臂桁架体系,能够协调核心筒与框架间变形和减小结构地震反应,且能削弱常规结构加强层上下相邻层的结构刚度、内力突变等不利影响。通过计算研究表明:采用设置黏滞阻尼器的消能减震层,结构的最大层间位移角及倾覆力矩有较大幅度减小,层剪力有一定幅度减小;减震效果看,黏滞阻尼器竖向布置减震效果优于其他布置形式;黏滞阻尼器的最大出力值较大时,通过对黏滞阻尼器的阻尼指数调整,可以改变黏滞阻尼器的出力状态,避免梁柱节点因受力过大导致受力复杂,以达到阻尼器的工作性能与结构减震效果的统一。
Frame-core tube structure with energy dissipation story can coordinate deformation between framework and core,reduce the earthquake response,and they can also weaken the internal force mutations of common structure.The results show that the energy dissipation of structure added with viscous damper(VD) energy dissipation,the maximum story drift,overturning moment and the story shear is greatly reduced.Vertical layout of viscous damper is the best one for energy dissipation story.In order to achieve the unity of the working performance and structural damping effect,the damping exponent can be modify if necessary.The most important thing is that the smaller damping force of VD,the more simple node designing.
引文
[1]周云,林绍明.带耗能减震层框架核心筒结构的简化模型与减震机理研究[J].工程力学,2016,33(2):136-144.(Zhou Yun,Lin Shaoming.Research on a simplified model and energy dissipation mechanism of frame-core tube structure with energy dissipation story[J].Engineering mechanics,2016,33(2):136-144.(in Chinese))
    [2]周云,钱洪涛,褚洪民,邹征敏.新型防屈曲支撑设计原理与性能研究[J].土木工程学报,2009,4(42):64-71.(Zhou Yun,Qian Hongtao,Chu Hongmin,et al.A study on the design principle and performance of a new type of Buckling-Resistant Brace[J].China Civil Engineering Journal,2009,42(4):64-71.(in Chinese))
    [3]中华人民共和国国家标准.GB 50011—20lO建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(Professional Standard of the People's Republic of China.GB500011—2010 Code for seismic design of buildings[J].Beijing:China Architecture and Building Press,2010.(in Chinese))
    [4]邢丽丽,周颖.黏滞阻尼器型伸臂桁架的最优布置形式研究[J].地震工程与工程振动,2016,36(1):68-76.(Xing Lili,Zhou Ying.The study of optimal arrangement form of outrigger trusses with viscous dampers[J].Earthquake engineering and engineering dynamics,2016,36(1):68-76.(in Chinese))

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