装配式斜支撑节点钢框架连续倒塌分析与机理研究

发布时间：2018-05-21 09:13

本文选题：装配式钢框架 + 连续性倒塌　；参考：《湖南大学》2015年硕士论文

【摘要】：装配式斜支撑节点钢框架是最近几年提出的一种新型的结构体系,其结构特点改变传统的建筑结构模式,用钢材替代混凝土、砖和木材等,能够很好地实现设计的标准化、生产的工业化、施工的装配化。虽然国内一些高校和科研单位对此展开了深入的研究,也取得了卓有成效的研究成果,但缺少针对该结构体系的抗连续性倒塌分析,基于ABAQUS子结构法的研究更是匮乏。因此,本文选取简单框架,建立杆元及实体有限元模型,对ABAQUS子结构分析方法进行验证,对比研究整体模型法与子结构法、杆单元与实体单元、静力分析与动力分析之间的差异,并基于该方法对某一实例工程研究其连续倒塌的动力分析特性,并评估其抗连续倒塌能力,分析装配式斜支撑节点钢框架抗连续倒塌的破坏机理。本文的主要内容包括:(1)研究国内外结构连续倒塌评估方法,并根据工程特点及ABAQUS子结构法特点,选取合理的分析方法,建立符合工程要求的连续倒塌判定准则。(2)结合ABAQUS子结构分析方法理论,确立子结构选取方法及容许倒塌范围,并建立简单验证模型,验证ABAQUS子结构分析法在结构连续性倒塌分析中的可行性及准确性,为后续分析提供参考依据。(3)根据实际工程的工程概况,建立有限元分析模型,确定合理的加载方式,对其进行结构连续倒塌动力非线性分析。研究动力分析过程中关注构件的位移响应、内力分布及能量变化,并对该工程的抗连续性倒塌性能进行评估。(4)选取分析模型中失效柱所在的一榀框架进行应力分析,研究其内力重分布机制、塑性区分布机制、转动铰机制和滑动面机制下的内力重分布。(5)总结文章研究内容,根据研究结果为装配式斜支撑节点钢框架设计提出设计建议,并展望该研究后续工作。
[Abstract]:Steel frame with prefabricated oblique braced joints is a new type of structure system proposed in recent years. Its structural characteristics change the traditional building structure mode and replace concrete, brick and wood with steel, which can realize the design standardization well. Industrialization of production and assembly of construction. Although some universities and scientific research institutions in China have carried out in-depth research and obtained fruitful research results, there is a lack of continuous collapse analysis of the structure system, and the research based on ABAQUS substructure method is even less. Therefore, this paper selects simple frame, establishes the finite element model of bar element and entity, verifies the method of ABAQUS substructure analysis, and compares the whole model method with substructure method, bar element and solid element. The difference between static analysis and dynamic analysis, and based on this method, the dynamic analysis characteristics of continuous collapse of a given engineering are studied, and its ability to resist continuous collapse is evaluated. The failure mechanism of steel frame with assembled diagonal braced joints against continuous collapse is analyzed. The main contents of this paper include: (1) to study the evaluation methods of continuous collapse of structures at home and abroad, and to select a reasonable analysis method according to the characteristics of engineering and ABAQUS substructure method. According to the theory of ABAQUS substructure analysis method, the substructure selection method and allowable collapse range are established, and a simple verification model is established. The feasibility and accuracy of ABAQUS substructure analysis method in the continuous collapse analysis of structures are verified, and the reference basis for subsequent analysis is provided. (3) according to the engineering situation of the actual project, the finite element analysis model is established, and the reasonable loading mode is determined. The dynamic nonlinear analysis of continuous collapse of the structure is carried out. In the process of dynamic analysis, attention is paid to the displacement response, internal force distribution and energy change of the member, and the anti-collapse performance of the project is evaluated. (4) A frame located in the failure column in the analysis model is selected for stress analysis. The internal force redistribution mechanism, the plastic zone distribution mechanism, the rotation hinge mechanism and the internal force redistribution under the sliding surface mechanism are studied. The research contents are summarized. According to the research results, some design suggestions are put forward for the design of the steel frame with prefabricated oblique braced joints. The follow-up work of this study is also prospected.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU391;TU312.3

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