藏式古建典型梁柱连接与木结构体系受力性能研究

发布时间：2018-01-22 07:34

本文关键词： 藏式古建木构梁柱连接多柱式结构性能分析有限元模型滞回性能　出处：《北京交通大学》2013年硕士论文　论文类型：学位论文

【摘要】：藏式古建筑的木结构是密梁平顶式结构体系,其结构特点与我国其他地区的古建筑木结构有显著不同。随着西藏旅游业的发展,藏式古建筑保护问题日益凸显。结构机理是进行藏式古建木构性能分析与状态评估的基础。本文重点研究藏式古建木构梁柱节点在水平荷载作用下的性能,并讨论藏式古建木构架的整体性能。本文主要工作如下： (1)基于在典型藏式古建筑现场勘查的结果,结合大量文献资料,总结了藏式古建筑整体架构的特点,介绍了各部分构造做法与结构特点；以多柱式结构的受力特点为基础,对相邻构件的变形关联进行了讨论。 (2)对藏式一柱式结构和二柱式结构进行结构力学分析,作为建立梁柱连接在水平荷载作用下的有限元模型的基础。使用ANSYS软件模拟了梁柱连接在水平荷载作用下的受力,得到结构的滞回曲线、滞回刚度等重要信息,对比了在不同竖向荷载下梁柱连接的水平受力性能。此外,分析了结构在加载过程中的破坏和最终可能出现的破坏,为结构的加固提供了依据。 (3)以藏式多柱式结构为研究对象,进行结构力学概念分析。具体分析了多柱式结构中各构件所受外荷载的情况。使用ANSYS软件对多柱式结构在竖向荷载作用下的受力性能进行数值模拟,获得了多柱式结构各构件的破坏顺序和破坏形式,分析了结构最终破坏的原因。绘制了结构的荷载-位移曲线,并根据图解法得到了结构的延性系数。最后,对有限元模拟结果的准确性和参考价值进行了总结。 (4)总结了两类常见的木构架变形,并以藏式多柱式结构的结构力学模型为基础,分析了各构件关键点位置的变形的相关性。
[Abstract]:The timber structure of Tibetan ancient buildings is a dense beam flat roof structure system, and its structural characteristics are obviously different from those of other ancient buildings in China, with the development of tourism industry in Tibet. The protection problem of Tibetan ancient buildings is increasingly prominent. The structural mechanism is the basis for the performance analysis and state evaluation of ancient Tibetan structures. This paper focuses on the performance of Liang Zhu joints of ancient Tibetan structures under horizontal loads. The overall performance of Tibetan ancient wooden frame is also discussed. The main work of this paper is as follows: 1) based on the results of site survey in typical Tibetan ancient buildings, combined with a large number of documents, this paper summarizes the characteristics of the whole structure of Tibetan ancient buildings, and introduces the structural practices and structural characteristics of each part; Based on the stress characteristics of multi-column structure, the deformation correlation of adjacent members is discussed. 2) structural mechanics analysis of Tibetan one-column structure and two-column structure. As the foundation of establishing the finite element model of Liang Zhu connection under horizontal load, the hysteretic curve of the structure is obtained by using ANSYS software to simulate the force of Liang Zhu connection under horizontal load. The horizontal mechanical behavior of Liang Zhu connection under different vertical loads is compared with the important information such as hysteretic stiffness. In addition, the failure of the structure during the loading process and the possible failure in the end are analyzed. It provides the basis for the reinforcement of the structure. (3) taking the Tibetan multi-column structure as the research object. The concept of structural mechanics is analyzed, and the external load of each member in multi-column structure is analyzed concretely. The numerical simulation of the mechanical behavior of multi-column structure under vertical load is carried out by using ANSYS software. The failure sequence and failure form of each member of multi-column structure are obtained, and the cause of ultimate failure of the structure is analyzed. The load-displacement curve of the structure is drawn, and the ductility coefficient of the structure is obtained according to the graphic method. Finally. The accuracy and reference value of finite element simulation results are summarized. Based on the structural mechanics model of Tibetan multi-column structure, the correlation of deformation of key points of each component is analyzed.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU366.2

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