采用粘滞阻尼器的某办公建筑消能减震设计与分析

文中以北京某办公楼采用粘滞阻尼器进行消能减震设计为例,介绍了结构消能减震设计中阻尼器的布置、时程分析地震波的选取、减震前后的效果分析及附加阻尼比的确定。结果表明,通过布置粘滞阻尼器,有效提高了结构的抗震性能,能够达到预期的消能减震设计目标。     

奥体体育场加固改造工程消能减震分析与设计

针对消能技术在奥林匹克体育中心体育场加固改造工程中的应用。讨论了消能减震结构的分析及设计方法和设计思路、液体粘滞阻尼器的参数选择、布置方式、消能结构构件设计方法等问题。根据不同加固方案的对比分析,在抗震加固工程中采用消能减震装置可明显减小地震力,并减小新加支撑附加给既有结构的地震力。消能减震设计宜根据建筑功能要求、结构变形形式布置消能装置。     

超高层建筑基于性能的组合消能减震结构设计及其应用

组合消能减震是在结构中组合应用速度型阻尼器和位移型阻尼器,地震作用下参与结构耗能,降低结构地震响应。基于性能的组合消能减震设计是从性能化设计理念出发,通过调整消能减震装置在结构中的布置位置和力学特性参数,在不同水准地震作用下分阶段发挥各阻尼器的作用,满足结构受力变形要求,提高结构抗震性能。以云南省昆明市一超高层建筑为工程背景,在结构中同时布置了速度型阻尼器和位移型阻尼器,研究了不同类型减震装置在结构中的较优布置位置,结果表明:本工程采用组合消能减震技术后,在多遇地震、设防地震和罕遇地震作用下,各类减震装置均能充分参与结构耗能,相比传统抗震结构,其地震响应和构件损伤可得到更好的控制,整体结构能够满足预期抗震性能目标要求。     

超高层建筑基于性能的组合消能减震结构设计及其应用

组合消能减震是在结构中组合应用速度型阻尼器和位移型阻尼器,地震作用下参与结构耗能,降低结构地震响应。基于性能的组合消能减震设计是从性能化设计理念出发,通过调整消能减震装置在结构中的布置位置和力学特性参数,在不同水准地震作用下分阶段发挥各阻尼器的作用,满足结构受力变形要求,提高结构抗震性能。以云南省昆明市一超高层建筑为工程背景,在结构中同时布置了速度型阻尼器和位移型阻尼器,研究了不同类型减震装置在结构中的较优布置位置,结果表明:本工程采用组合消能减震技术后,在多遇地震、设防地震和罕遇地震作用下,各类减震装置均能充分参与结构耗能,相比传统抗震结构,其地震响应和构件损伤可得到更好的控制,整体结构能够满足预期抗震性能目标要求。     

某中学活动中心消能减震加固设计

对某中学活动中心采用消能减震方法进行加固设计。通过布置20套减震装置后,结构增加了8%的阻尼比,且通过阻尼器自身的耗能,原结构的抗震性能得到了大幅提高。     

消能减震技术提高既有建筑结构抗震性能的设计应用

厦门海沧区某新近竣工办公建筑拟改造为教育建筑,抗震设防类别由标准设防类改为重点设防类。项目采用加设黏滞阻尼器进行消能减震加固,运用STAWE和SAUSG结构分析软件,对减震加固结构层间位移角、楼层剪力、能量分布、结构构件损伤等抗震性能对比分析,验证了消能减震加固技术能明显改善抗震性能,降低抗震构造措施要求。对比传统加固方式,运用消能减震技术,能有效耗散地震输入能量,且明显减少结构构件直接加固工作,具有良好的综合效益。本工程案例,对于类似抗震设防类别提高的加固工程,具有借鉴意义。     

墙式铅剪切型阻尼器在某教学楼加固中的应用

某中学教学楼因修建于20世纪50年代末,其抗震性能不满足现行抗震设计要求,采用在原有结构中设置墙式铅剪切型阻尼器的加固方法提高其抗震性能.运用SAP2000建立结构有限元模型并进行多遇地震下的弹性时程分析,确定了消能减震加固方案,然后对该减震结构在多遇地震及罕遇地震下的减震效果进行了验证,也介绍了阻尼器与主体结构的连接...     

消能减震技术在结构抗震加固中的研究与应用进展

消能减震技术可为结构提供附加阻尼,消能减震装置在结构中充当保险丝功能,阻尼器为抗震第一道防线,其相对于传统抗震加固技术而言具有很大优势,主要有减震效果好,施工周期短,经济成本低等优点。介绍了消能减震的原理、消能阻尼器的类型和消能减震结构的设计方法,分析了消能减震技术在结构抗震加固中的设计思路、安装部位以及具体工程实例,对消能减震技术的前景进行了展望。     

黏滞阻尼器在框架结构中的应用与研究

黏滞阻尼器可以为消能减震结构附加足够的阻尼比且不附加刚度,提高结构的抗震性能,在消能减震结构中应用十分广泛.本文针对设置黏滞阻尼器的框架结构,根据初设附加阻尼比,估算出了结构所需附加阻尼器数量,并在按照均匀、分散、对称的原则布置阻尼器后,进行了结构减震分析与附加阻尼比复核.考虑到阻尼器产品误差、安装误差以及计算方法误差...     

增设粘弹性阻尼器对超限高层的优化设计分析

介绍了消能减震技术的原理以及粘弹性阻尼器的工作机理,结合工程实例,对比了三种不同粘弹性阻尼器布置下的结构抗震性能,验证了粘弹性阻尼器可以有效改善加固改造后有加强层的超限高层的抗震能力。     

某钢筋混凝土框架增设阻尼器抗震加固分析

本文就一幢未考虑抗震设防的八层钢钢筋混凝土框架结构,对采用层间增设粘滞阻尼器的方法进行抗震加固作了讨论.内容包括加固前后的抗震能力评估,大震下带有耗能装置结构的计算分析和加固设计的实施步骤.     

Seismic retrofit of a high‐rise steel moment‐resisting frame using fluid viscous dampers

The Tall Building Initiative project of Pacific Earthquake Engineering Research Center has been expanded to investigate the seismic performance and possible retrofit of existing tall buildings. A candidate 35‐story steel building with representative details from the early 1970s was analyzed following several guidelines, which revealed a wide range of potential inadequacies. Thus, a two‐level retrofit approach was examined that focused on achieving the collapse prevention limit state under the major basic safety earthquake (BSE‐2E) hazard level prescribed by ASCE 41. This paper focused on a Level‐2 retrofit that used fluid viscous dampers to augment Level‐1 retrofits. For this approach, feasible damper locations and overall effective damping ratios were first evaluated through a series of preliminary studies, and then a two‐phase design method was used to refine the distribution and mechanical properties of the dampers. Thorough assessments of the refined design were carried out following several design guidelines, including ASCE 41, FEMA 351, and FEMA P‐58. The results indicated that the proposed retrofit method of using fluid viscous dampers could achieve the retrofit goal and provide a cost‐effective means of improving the structural behavior and reducing economic losses in a major seismic event.     

核筒悬挂结构随机动力响应的参数优化设计

高层建筑核筒悬挂结构是在核筒与悬挂框架之间设置阻尼器,以减小地震作用下的结构动力响应。在频域内应用复模态叠加与虚拟激励相结合的方法,建立悬挂减振结构的随机地震响应分析方法,在此基础上针对一个典型的算例,以核筒顶点位移、悬挂框架层间位移为优化目标,给出核筒与悬挂框架间阻尼器连接和弹簧连接的合理布置方案及参数优化结果。研究表明,选择在核筒与悬挂框架间综合设置弹簧连接和阻尼器连接,并合理地选择相应的参数,可以显著地提高结构体系的消能减振效果。     

Seismic retrofit of structures using steel honeycomb dampers

The purpose of this paper is to investigate the seismic performance of a honeycomb shaped steel hysteretic damper applied to seismic retrofit or strengthening of a structure. The formulas for the initial stiffness and yield strength of a damper unit were derived based on the cell wall bending model, and the results were compared with those obtained from finite element analysis. Bilinear model of the honeycomb damper was developed based on the nonlinear force-displacement relationship obtained from finite element analysis. The honeycomb dampers were applied for seismic retrofit of a 15-story apartment building designed without considering seismic load and for seismic design of a 3-story moment frame designed with reduced seismic load. The analysis results showed that the honeycomb dampers were effective in the enhancement of seismic-load resisting capacity of the model structures.     

黏滞阻尼器控制偏心结构扭转耦联振动效果分析

为了有效控制地震作用下偏心结构扭转耦联振动所引起的灾变问题,在理论分析和数值计算的基础上,建立了地震作用下偏心结构的扭转耦联运动方程,通过研究黏滞阻尼器对偏心结构扭转耦联振动的控制效果,对比分析4种黏滞阻尼器常用布置方案下偏心结构的地震响应,量化了黏滞阻尼器和钢支撑共同保护作用下对偏心结构减震效果的影响。研究结果表明:设置有黏滞阻尼器的偏心结构,在双向地震作用下偏心结构最大层位移和层间位移角均得到有效的控制;在多遇地震作用下黏滞阻尼器人字型布置方式对控制偏心结构扭转效果明显,罕遇地震作用下不同布置方式的控制效果相差不大,其结果可为地震作用下类似的偏心结构扭转效应的振动控制提供借鉴参考。     

Seismic performance analysis of viscous damping outrigger in super high‐rise buildings

This paper introduces a seismic energy dissipation technology—viscous damping outrigger (VDO)—which is composed of outrigger truss and viscous damper. The viscous damper is set up vertically at the end of outrigger truss, which is an innovative and high‐efficiency arrangement. VDO can fully utilize the characteristic of structural lateral deformation of super high‐rise buildings to increase the efficiency of viscous dampers for enhancing structural security, improving seismic performance, and reducing construction expenditure. In this paper, working principle and seismic energy dissipating mechanism of VDO are explained firstly. Then, the influence of viscous damper parameters on energy dissipation efficiency is studied. Next, the optimal position of VDO in a super high‐rise building is analyzed in detail. Lastly, the application of VDO in structural seismic design of a super high‐rise building in China will be clearly verified based on their feasibility, economy, and safety.     

基于性能的耗能减震加固设计理论框架

本文在国内外有关耗能减震加固与基于性能的设计方法研究的基础上,提出了基于性能的耗能减震加固设计的理论框架,并给出了设计过程中加固结构的性能目标、待加固结构的性能评估、减震概念设计、附加耗能器的设计、分析方法、加固结构的抗震安全性评价和社会经济综合评价各关键环节的子框图,较为清晰的展现了设计的基本过程,明确了下一步研究的方向及着重解决的问题。     

Evaluation of a developed bypass viscous damper performance

In this study, the dynamic behavior of a developed bypass viscous damper is evaluated. Bypass viscous damper has a flexible hose as an external orifice through which the inside fluid transfer from one side to the other side of the inner piston. Accordingly, the viscosity coefficient of the damper can be adjusted using geometrical dimensions of the hose. Moreover, the external orifice acts as a thermal compensator and alleviates viscous heating of the damper. According to experimental results, Computational Fluid Dynamic (CFD) model, a numerical formula and the simplified Maxwell model are found and assessed; therefore, the verification of numerical and computational models are evaluated for simulating. Also, a simplified procedure is proposed to design structures with bypass viscous dampers. The design procedure is applied to design an 8-story hospital structure with bypass viscous dampers, and it is compared with the same structure, which is designed with concentric braces and without dampers. Nonlinear time history analyses revealed that the hospital with viscous damper experiences less structural inelastic demands and fewer story accelerations which mean fewer demands on nonstructural elements. Moreover, seismic behaviors of nonstructural masonry claddings are also compared in the cases of hospital structure with and without dampers.     

粘滞流体阻尼器用于建筑结构的减震设计原理与方法

研究了粘滞流体阻尼器用于建筑结构消能减震设计的原理、分析方法。包括阻尼器的设置、消能支撑的型式、支撑钢杆的设计、抗震设防目标、消能减震建筑结构的特点。给出了消能减震结构的附加水平控制力、附加有效阻尼比、地震影响系数、阻尼矩阵的计算方法;介绍了振型分解反应谱法和直接动力时程分析法的设计计算要点。最后给出了采用粘滞流体阻尼器进行消能减震设计的实用设计步骤。     

大跨结构抗震性能鉴定与加固研究

对在役建筑物进行抗震性能鉴定,并对不满足鉴定要求的建筑采取适当的抗震加固对策,是减轻地震灾害的重要手段。通过对南京五台山体育馆抗震性能检测、鉴定与加固设计。综合考虑原结构特点、抗震构造和承载力等因素,并结合现场检测及理论计算与分析,对结构抗震能力进行综合评价。针对其抗震性能的不足之处提出设置消能支撑进行加固的方案,对加固后结构进行多遇与罕遇地震作用下的强度和变形计算。计算表明,消能支撑可有效降低结构地震反应,保障原结构地震安全性。