【摘要】：國外對建筑結構的連續(xù)倒塌現(xiàn)象的研究始于1968年英國Ronan Point公寓倒塌事件。四十多年來,各國學者進行了大量的研究試驗,并編制了相關的設計規(guī)范和指南,如美國ACI 318規(guī)范中的相關條文,GSA 2003設計指南,DoD UFC 4-023-03、歐洲EuroCode 1、英國BS8110等。我國對結構抗連續(xù)倒塌的研究起步較晚,相關規(guī)范的制定也比較滯后,直到2011年,新版混凝土結構設計規(guī)范GB 50010-2010才對混凝土結構抗連續(xù)倒塌設計給出了一些原則性的規(guī)定。目前,無論是國內還是國外,建筑結構的抗連續(xù)倒塌分析仍是有一個很熱門的研究課題,我國關于結構抗連續(xù)倒塌設計的相關規(guī)范條文和實用設計方法亟待制定和完善。本文全面回顧了國內外結構抗連續(xù)倒塌的研究成果和規(guī)范制定情況,對國外主要規(guī)范中的抗連續(xù)倒塌設計方法進行了總結和梳理。本文以一個六層鋼筋混凝土框架結構為例,首先按我國規(guī)范,在不同的抗震設防烈度下進行常規(guī)設計,然后參照國際上的主要抗連續(xù)倒塌規(guī)范,采用線性靜力變換荷載路徑的方法,對不同抗震設防烈度的結構進行抗連續(xù)倒塌性能分析和研究。分析中假想拆除結構底層外圍的長邊中間柱和角柱,對剩余結構構件的需供比DCR值進行分析計算,并與規(guī)范中DCR容許值進行比對,分析得出結構可能出現(xiàn)破壞和連續(xù)倒塌的范圍。然后,本文又按線性動力方法對結構進行了分析,并與靜力計算結果進行了比對。分析得出如下結論:按較高抗震設防烈度進行設計的常規(guī)結構,表現(xiàn)出了良好的抗連續(xù)倒塌性能,而按低抗震設防烈度進行設計的結構,在偶然荷載作用下存在很大的連續(xù)倒塌風險。本文還對抗連續(xù)倒塌設計非線性設計方法進行了探討。最后,本文從設計復雜程度、設計成本考慮,提出了線性靜力分析方法是近期適合我國現(xiàn)狀的抗連續(xù)倒塌設計的實用分析方法。
[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.
【學位授予單位】：石家莊鐵道大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU375.4;TU312.3

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