带粘弹性阻尼器高层钢框架结构的减震性能研究

发布时间：2018-07-10 03:38

本文选题：高层钢结构 + 粘弹性阻尼器　；参考：《昆明理工大学》2017年硕士论文

【摘要】：目前,高层钢结构建筑的发展和应用日渐成熟,但人们对于建筑物抗震性能的要求也越来越高。减震控制技术近年来在国内外得到了广泛的研究和应用,其中利用粘弹性阻尼器对结构进行减震控制,与传统的抗震方法相比,具有明显的技术优势。工程实践表明,合理使用减震控制技术能有效改善和提高结构的抗震性能。阻尼器一般被分为速度相关型、位移相关型和其他类型,其耗能减震效果当然也存在着很大的区别。本文旨在研究在高层钢框架中布置粘弹性阻尼器对结构进行减震控制,并对阻尼器的数量和布置方法进行研究。本文介绍了高层钢框架结构及粘弹性阻尼器的发展概况。通过理论学习和研究,选择合适结构模型及参数、阻尼器恢复力模型及参数,并通过使用有限元计算软件SAP2000对一幢办公楼进行模态分析、反应谱分析、多遇地震下的弹性时程分析和罕遇地震下的非线性时程分析等,研究分析了带粘弹性阻尼器的高层钢框架结构的减震性能。主要内容如下:(1)本文利用SAP2000建立高层钢框架结构模型,分别在地震作用下,对不设支撑和加支撑的两个高层钢框架模型进行模态分析和反应谱分析,通过对比得出加支撑结构性能更优。(2)通过在加支撑模型上设置不同数量的粘弹性阻尼器,应用非线性时程法,研究不同阻尼器数量结构的减震效果。(3)取较好的阻尼器布置数量,进一步研究相同阻尼器数量的情况下,不同布置方法的减震效果。(4)按照"均匀、对称、分散、周边"的总原则,根据其分析结果中的位移等指标选取较优的阻尼器布置方案,通过改变阻尼器的布置方式来进行减震效果的对比,得出较优的布置方案,并采用非线性直接积分时程分析法进行罕遇地震作用下的减震效果分析。
[Abstract]:At present, the development and application of high-rise steel structures are becoming more and more mature, but the requirements for seismic performance of buildings are becoming higher and higher. In recent years, the damping control technology has been widely studied and applied at home and abroad, in which the viscoelastic damper is used to control the structure, which has obvious technical advantages compared with the traditional seismic method. Engineering practice shows that reasonable use of seismic control technology can effectively improve the seismic performance of the structure. The dampers are generally divided into velocity dependent type, displacement dependent type and other types. The purpose of this paper is to study the design of viscoelastic dampers in high-rise steel frames to control the vibration of the structure, and to study the number and layout of the dampers. This paper introduces the development of high-rise steel frame structures and viscoelastic dampers. Through the theoretical study and research, the appropriate structural model and parameters, the damper restoring force model and parameters are selected, and the modal analysis and response spectrum analysis of an office building are carried out by using the finite element calculation software SAP2000. The seismic absorption performance of steel frame structures with viscoelastic dampers is studied by means of elastic time-history analysis under frequent earthquakes and nonlinear time-history analysis under rare earthquakes. The main contents are as follows: (1) in this paper, the model of high-rise steel frame structure is established by using SAP2000. The modal analysis and response spectrum analysis of the two steel frame models without bracing and bracing are carried out respectively under earthquake. It is concluded that the performance of braced structures is better. (2) by setting different numbers of viscoelastic dampers on the bracing model, the nonlinear time-process method is applied to study the effect of vibration absorption of different dampers. (3) A better number of dampers are arranged. In the case of the same number of dampers, the damping effect of different arrangement methods is further studied. (4) according to the general principle of "uniformity, symmetry, dispersion and periphery", according to the general principle of "uniformity, symmetry, dispersion, periphery", and according to the displacements in the analysis results, the better damper layout scheme is selected. By changing the arrangement of dampers to compare the effect of shock absorption, a better arrangement scheme is obtained, and the nonlinear direct integral time-history analysis method is used to analyze the effect of earthquake absorption under rare earthquake.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.13;TU973.31

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