不规则高层钢结构地震响应及消能减震分析

发布时间：2018-01-11 22:32

本文关键词：不规则高层钢结构地震响应及消能减震分析　出处：《安徽建筑大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着经济建设的不断发展，人们已经设计出许多形式新颖、独特的不规则高层建筑。近年来，由于钢材具有材质均匀，强度易于得到保证，结构的可靠性大，轻质高强等特点被广泛应用于高层建筑中。每年，全球由于地震造成的损失不计其数，而且随着城市人口密度不断加大，，强震带来的损害将更为严重。因此，对不规则高层钢结构的地震响应及消能减震研究是很有必要的。首先本文主要介绍了不规则结构的发展概况以及几种抗震理论分析。然后使用大型有限元计算软件SAP2000对某综合办公大楼高层钢结构进行了模态分析、反应谱分析和时程分析以及消能减震分析在多遇以及罕遇地震下。最后得到了该结构的楼层位移和层间位移角。主要内容如下：（1）本文利用SAP2000建立了设置横向支撑的有限元模型，通过模态分析获得了该结构的前12阶自振周期和质量参与系数并研究了该结构的动力特性。（2）在多遇地震下对加横向支撑和不加横向支撑模型体系进行反应谱分析和弹性时程分析。通过对这两种结果对比来研究该结构的地震响应和支撑对结构刚度的影响。（3）本文对加横向支撑的模型进行了在罕遇地震下的非线性时程分析得到了该结构的地震响应，并通过对塑性铰的分析发现结构的薄弱点。（4）通过在模型上设置粘弹性阻尼器来研究结构在非线性时程分析下的减震效果。通过对设置粘弹性阻尼器和没有设置粘弹性阻尼器模型结果对比得出减震结构的优越性。本文由安徽省高等学校自然科学研究重大项目《非规则结构地震反应特性与抗震减震研究》（编号：KJ2014ZD07）资助。
[Abstract]:With the continuous development of economic construction, people have designed many new and unique irregular high-rise buildings. In recent years, due to the uniform material of steel, the strength is easy to be guaranteed, and the reliability of the structure is great. Light, high strength and other characteristics are widely used in high-rise buildings. Every year, the damage caused by earthquakes is innumerable, and with the increasing of urban population density, the damage caused by strong earthquakes will be more serious. It is necessary to study the seismic response and energy dissipation of irregular tall steel structures. This paper mainly introduces the development of irregular structure and several seismic theory analysis. Then, the modal analysis of high-rise steel structure of a comprehensive office building is carried out by using the large finite element calculation software SAP2000. Analysis. The response spectrum analysis, time history analysis and energy dissipation analysis are used in the analysis of frequent and rare earthquakes. Finally, the floor displacement and interstory displacement angles of the structure are obtained. The main contents are as follows: In this paper, the finite element model of transverse bracing is established by using SAP2000. The first 12 order natural vibration period and mass participation coefficient of the structure are obtained by modal analysis and the dynamic characteristics of the structure are studied. 2). Response spectrum analysis and elastic time history analysis of the model system with and without lateral bracing are carried out under frequent earthquakes. The effects of seismic response and bracing on the stiffness of the structure are studied by comparing the two results. . 3) in this paper, the nonlinear time-history analysis of the model with lateral braces under rare earthquakes is carried out to obtain the seismic response of the structure, and the weak points of the structure are found through the analysis of the plastic hinge. 4). By setting viscoelastic dampers on the model to study the vibration absorption effect of structures under nonlinear time-history analysis, the model results of viscoelastic dampers and those without viscoelastic dampers are compared. Transgression. This paper is supported by the important project of natural science research in colleges and universities of Anhui Province, "study on Seismic response characteristics and Seismic absorption of irregular structures" (No.: KJ2014ZD07).
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.31;TU973.13

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