钢骨混凝土梁式转换层高层建筑结构抗震分析

发布时间：2018-10-05 18:35

【摘要】：这些年,繁荣的高层结构形式种类繁多、日新月异,高层呈高速发展状态。其中,在浩瀚如海的各色各样建筑形式里,带转换层的高层建筑结构是比较优秀的一种。转换层不仅仅满足了使用效用的要求,而且完成了不同上下层结构形式的完美过渡。转换层大致分为以下几种:梁式转换层、板式转换层、箱形式转换层、桁架式转换层等等。其中,梁式转换层在世界范围内得到普遍采用的益于其传力路径清晰明了、受力形式不复杂等优异性能。然而,传统的钢筋混凝土梁式转换层自重过大、施工困难等缺陷使新型材料的梁式转换层结构得到快速发展并受到好评与青睐。目前,那些高层建筑结构采用新型材料的梁式转换层的系统深入的抗震性能研究对于实际工程应用具有非常重且深远的意义。本文将一栋高层建筑结构采用钢骨混凝土作为梁式转换层做数值模拟,分析内容如下:1)对于在目前设计规范和概念分析中的带转换层高层建筑结构的关联设计做系统的探讨。并且对带转换层高层建筑结构发展至今的抗震分析方法理论以及钢骨混凝土梁式转换层在国内外的发展情况进行分析研究。2)由不同的转换层位置进行不同取值,使用SAP2000对由于不同转换层位置而引起的不同框架剪力墙结构进行建模,然后给这些不同的结构模型做精细的反应谱分析和模态分析,从每个计算方案的振型、内力分布曲线、每个楼层的层间位移角、结构顶点的位移等诸多方面对其抗震性能进行对比分析,探讨这个因素给该类型结构处于弹性阶段时对抗震性能的作用。3)由不同的转换层上下刚度比进行不同取值,使用SAP2000给由于不同的转换层上下刚度而引起的不同框架剪力墙结构做方案的建立,然后给这些不同的结构方案做模态分析和反应谱分析,从每个计算方案的振型、建筑顶点的位移、每个楼层的层间位移角及内力分布曲线等诸多方面给其抗震性能做对比分析,分析这个因素给该类型建筑处于弹性阶段时抗震性能的作用。4)采用Pushover给建筑不同取值的方案模型做在多遇地震影响时和罕遇地震影响时的静力弹塑性分析,通过性能点、加载步数、最大层间位移角和塑性铰得出现状态等参数完善结构在地震作用下的反应能力。通过对不同转换层位置结构、不同转换层上下刚度比结构的弹性分析对比以及对其进行的弹塑性分析结果对比,最后得出符合规范要求并且最符合实际要求的结构设计方案,对未来同类结构工程的设计具有非常深远的借鉴意义。
[Abstract]:In recent years, the prosperous high-rise structure form is various, changes with each passing day, the high-rise assumes the high-speed development state. Among them, in the vast sea of all kinds of building forms, the high-rise building structure with transfer floor is a better one. The conversion layer not only meets the requirements of utility, but also completes the perfect transition of different upper and lower layers. Transfer layer is divided into the following types: beam transfer layer, plate transfer layer, box transfer layer, truss transfer layer and so on. Among them, the beam transfer layer is widely used in the world because of its clear transmission path, not complex force form and other excellent performance. However, the defects of traditional reinforced concrete beam transfer layer, such as excessive self-weight and difficult construction, make the new type of material beam transfer layer structure develop rapidly and be praised and favored. At present, it is very important and profound for the practical engineering application to study the seismic behavior of the beam-type transfer story system with new materials for high-rise building structures. In this paper, the steel reinforced concrete (SRC) is used as the beam transfer layer for numerical simulation of a high-rise building structure. The contents of the analysis are as follows: 1) the related design of the high-rise building structure with transfer story in the present design code and conceptual analysis is systematically discussed. And the seismic analysis method theory of high-rise building structure with transfer story and the development of steel reinforced concrete beam transfer story at home and abroad are analyzed. SAP2000 is used to model different frame shear wall structures caused by different transfer layer positions, and then fine response spectrum analysis and modal analysis are done for these different structural models. The modes and internal force distribution curves of each calculation scheme are analyzed. The seismic performance of each floor is compared with that of each floor, such as the displacement angle of each floor, the displacement of the top of the structure, and so on. The effect of this factor on seismic performance of this type of structure is discussed when it is in the elastic stage. 3) different values of the upper and lower stiffness ratios of different transfer floors are obtained. SAP2000 is used to establish different frame shear wall structures caused by different transfer floor stiffness, then modal analysis and response spectrum analysis are done for these different structural schemes, and the modes of each scheme are calculated. The displacement of the building vertex, the interstory displacement angle of each floor and the distribution curve of internal force are compared and analyzed to its seismic performance. By analyzing the effect of this factor on the seismic behavior of this type of building in the elastic stage (.4), the static elastic-plastic analysis of this type of building under the condition of frequent earthquake and rare earthquake is done by using the scheme model of Pushover for different values of the building, and through the performance point, The parameters such as loading steps, maximum interstory displacement angle and plastic hinge state are used to improve the response ability of the structure under earthquake. By comparing the elastic analysis and the elastoplastic analysis results of the structures with different transfer floor positions, the upper and lower stiffness ratios of the different transfer floors, the structure design scheme which meets the requirements of the code and is most suitable for the actual requirements is obtained. It is of great significance for the design of similar structure engineering in the future.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.31

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