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目前附加粘滞阻尼器的消能减震结构基于性能的抗震设计方法一方面为了确保实现性能目标需要进行复杂的迭代计算,另一方面没有具体给出阻尼器相应支撑刚度的计算方法。为此,本文在直接基于位移的抗震设计方法基础上,根据附加粘滞阻尼器所提供的阻尼力、层间剪力与附加等效粘滞阻尼比之间的关系以及利用支撑-阻尼器串联结构体系可以视为截断频率与支撑刚度和阻尼器阻尼系数相关的一阶滤波器这一思路,提出了一种针对附加粘滞阻尼器结构直接基于位移进行抗震设计的设计方法,并且进一步通过非线性时程分析计算验证了该设计方法的可行性。 相似文献
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短肢剪力墙结构已在我国的高层建筑中广泛运用,但相比于一般剪力墙其抗震性能有所消弱。文章运用有限元分析软件SAP2000建立了短肢剪力墙结构和其设置粘滞阻尼器的结构模型,对模型进行了在罕遇地震作用下的时程分析。通过比较,设置粘滞阻尼器的结构,其整个结构的地震反应得到显著降低。 相似文献
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同济设计院大楼改建前为一钢筋混凝土框架结构停车库,改建为一混合结构的综合办公楼,为提高改建结构的抗震性能,增设了粘滞阻尼器。对改建结构的方案比选进行了介绍,对设置粘滞阻尼器后的结构进行了多遇地震、设防地震和罕遇地震下的时程分析,同时进行了静力弹塑性分析。分析结果表明,增设粘滞阻尼器后可有效减小结构所承受的地震作用,从而提高了结构的抗震性能。 相似文献
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本文针对粘滞阻尼器在钢管混凝土结构中的抗震性能分析,利用有限元软件SAP2000,对附加粘滞阻尼器的12层钢管混凝土结构分别进行双向水平地震作用下的弹性时程分析。根据计算,对比分析原结构和附加阻尼器的钢管混凝土结构在多遇地震和罕遇地震作用下的抗震性能,结果表明粘滞阻尼器对结构减震控制效果明显。 相似文献
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This paper is concerned with seismic response analysis of structures with velocity-dependent passive energy dissipation devices, such as viscous and viscoelastic dampers. The modeling of a damper-brace component composed of a viscous or viscoelastic damper connecting with braces in series is presented. Several key parameters influencing the energy dissipation efficiency of such dampers in the damper-brace component are investigated and the relationships of the parameters and efficiency of the dampers are established. An equivalent model for the passive energy dissipation system is developed, which can significantly simplify the dynamic analysis of structures with the velocity-dependent dampers. The seismic responses of a single-story structure and a multi-story structure with the viscous and viscoelastic dampers are analyzed to verify the effectiveness of the passive energy dissipation devices for suppression of dynamic responses of structures and the reliability of the proposed simplified computational methods. 相似文献
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粘滞阻尼减震结构的研究与应用进展 总被引:5,自引:0,他引:5
本文总结了国内粘滞阻尼器的研究与应用现状,包括粘滞阻尼材料,粘滞阻尼器的类型、性能和力学模型,粘滞阻尼减震结构的性能、分析模型和设计方法,粘滞阻尼器在工程中的应用状况等。分析了粘滞阻尼器研究与应用中存在的问题,提出了今后应加强研究的几个问题,给出了发展减震技术的一些建议。 相似文献
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Jinkoo Kim Seungjun Lee Hyunhoon Choi 《The Structural Design of Tall and Special Buildings》2013,22(5):399-414
In this paper, the effect of viscous dampers on reducing progressive collapse potential of steel moment frames was evaluated by nonlinear dynamic analysis. Parametric studies were conducted first to evaluate the effects of dampers installed in a steel beam‐column subassembly with varying natural period and yield strength on the reduction of progressive collapse potential. Then 15‐story moment‐resisting frames with three different span lengths were designed with and without viscous dampers, and the effect of viscous dampers was investigated by nonlinear dynamic analysis. According to the parametric study, the vertical displacement generally decreased as the damping ratio of the system increased, and the dampers were effective in both the elastic and the elasto‐plastic systems. It was also observed that the effect of the damper increased as the natural period of the structure increased and the strength ratio decreased. The analysis results of 15‐story analysis model structures showed that the viscous dampers, originally designed to reduce earthquake‐induced vibration, were effective in reducing vertical displacement of the structures caused by sudden removal of a first‐story column, and the effect was more predominant in the structure with longer span length. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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对高烈度地震区某6层混凝土框架结构办公楼应用由钢支撑和液体粘滞阻尼器组成的消能减震阻尼器支撑体系进行了抗震分析。利用ETABS软件对其在设防烈度8度(0.3g)的地震作用下的地震反应进行了非线性时程分析。计算分析表明,该类消能减震阻尼器支撑有良好的消能减震效果,为类似工程提供了较好的参考。 相似文献
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本文在对不同结构构造的粘滞流体阻尼器的耗能原理进行分析研究的基础上,研制了一种性能良好的阻尼器──双出杆型粘滞流体阻尼器(专利号ZL00219648.4)。试验研究表明,研制的流体阻尼器是一种无刚度的速度相关型阻尼器,阻尼器的阻尼力与活塞的运动速度近似呈线性关系。介绍了工程结构采用粘滞流体阻尼器的减振设计原理,对一栋框架结构建筑进行了减振计算。计算表明,流体阻尼器可有效地降低结构的振动反应,是一种性能良好的消能减振装置。 相似文献
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大跨度斜拉桥结构一般比较细长和轻柔,因而其在车辆荷载作用下的动力响应值得设计者格外关注。结合椒江二桥实际工程,计算分析椒江二桥在车辆制动力荷载作用下的结构动力响应,同时采取设置黏滞阻尼器的措施控制车致振动,并确定合理的阻尼器设计参数。 相似文献