多层RC框架结构抗连续倒塌实用分析方法研究

发布时间：2018-11-26 18:16

【摘要】：国外对建筑结构的连续倒塌现象的研究始于1968年英国Ronan Point公寓倒塌事件。四十多年来,各国学者进行了大量的研究试验,并编制了相关的设计规范和指南,如美国ACI 318规范中的相关条文,GSA 2003设计指南,DoD UFC 4-023-03、欧洲EuroCode 1、英国BS8110等。我国对结构抗连续倒塌的研究起步较晚,相关规范的制定也比较滞后,直到2011年,新版混凝土结构设计规范GB 50010-2010才对混凝土结构抗连续倒塌设计给出了一些原则性的规定。目前,无论是国内还是国外,建筑结构的抗连续倒塌分析仍是有一个很热门的研究课题,我国关于结构抗连续倒塌设计的相关规范条文和实用设计方法亟待制定和完善。本文全面回顾了国内外结构抗连续倒塌的研究成果和规范制定情况,对国外主要规范中的抗连续倒塌设计方法进行了总结和梳理。本文以一个六层钢筋混凝土框架结构为例,首先按我国规范,在不同的抗震设防烈度下进行常规设计,然后参照国际上的主要抗连续倒塌规范,采用线性静力变换荷载路径的方法,对不同抗震设防烈度的结构进行抗连续倒塌性能分析和研究。分析中假想拆除结构底层外围的长边中间柱和角柱,对剩余结构构件的需供比DCR值进行分析计算,并与规范中DCR容许值进行比对,分析得出结构可能出现破坏和连续倒塌的范围。然后,本文又按线性动力方法对结构进行了分析,并与静力计算结果进行了比对。分析得出如下结论:按较高抗震设防烈度进行设计的常规结构,表现出了良好的抗连续倒塌性能,而按低抗震设防烈度进行设计的结构,在偶然荷载作用下存在很大的连续倒塌风险。本文还对抗连续倒塌设计非线性设计方法进行了探讨。最后,本文从设计复杂程度、设计成本考虑,提出了线性静力分析方法是近期适合我国现状的抗连续倒塌设计的实用分析方法。
[Abstract]:The study on the continuous collapse of building structure abroad began in 1968 with the collapse of Ronan Point apartment in England. Over the past 40 years, scholars from all over the world have carried out a large number of research tests and compiled relevant design specifications and guidelines, such as the relevant provisions in the ACI 318 specification of the United States, the GSA 2003 design guide, DoD UFC 4-023-03, the European EuroCode 1, and the British BS8110, and so on. The research on continuous collapse resistance of concrete structures in China started late, and the formulation of relevant codes was lagged behind. Until 2011, the new concrete structure design code GB 50010-2010 did not provide some principles for the continuous collapse design of concrete structures. At present, whether at home or abroad, the continuous collapse analysis of building structures is still a hot research topic. The relevant codes and practical design methods for continuous collapse design of structures need to be formulated and perfected in our country. In this paper, the research results and specifications of continuous collapse resistance of structures at home and abroad are reviewed, and the design methods of continuous collapse resistance in foreign main codes are summarized and sorted out. In this paper, a six-story reinforced concrete frame structure is taken as an example. Firstly, according to the code of our country, the conventional design is carried out under different seismic fortification intensity, and then referring to the main international codes for continuous collapse resistance. The continuous collapse resistance of structures with different seismic fortification intensity is analyzed and studied by the method of linear static transformation of load path. In the analysis, it is assumed that the long-side intermediate column and corner column around the bottom of the structure will be removed, and the DCR value of the remaining structural members will be analyzed and calculated, and compared with the allowable value of DCR in the code. The range of possible failure and continuous collapse of the structure is obtained by analysis. Then, the structure is analyzed according to the linear dynamic method and compared with the static calculation results. The conclusions are as follows: the conventional structures designed with high seismic fortification intensity show good resistance to continuous collapse, while structures with low seismic fortification intensity are designed. There is a great risk of continuous collapse under accidental load. The nonlinear design method for continuous collapse design is also discussed in this paper. Finally, considering the design complexity and design cost, this paper puts forward that linear static analysis method is a practical analysis method for anti-continuous collapse design which is suitable for the present situation of our country in the near future.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU375.4;TU312.3

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