本文選題：連續(xù)倒塌 + 預壓裝配式框架結(jié)構(gòu)��； 參考：《合肥工業(yè)大學》2017年碩士論文

【摘要】：1968年英國的Ronan Point公寓倒塌事故使得建筑結(jié)構(gòu)的連續(xù)倒塌問題開始受到工程界的重視,在這之后經(jīng)過了數(shù)十年的研究取得了眾多的研究成果,同時提出了適用于連續(xù)倒塌問題的分析方法和設計方面的建議,并且編制出相關的設計規(guī)程。但是對于目前廣泛推廣的裝配式結(jié)構(gòu)的抗連續(xù)倒塌問題的研究則較少。本文以預壓裝配式預應力混凝土框架結(jié)構(gòu)為對象,以可靠度分析方法為手段,研究其在地震作用下的抗連續(xù)倒塌性能。預壓裝配式預應力混凝土框架結(jié)構(gòu)通過改進裝配式結(jié)構(gòu)的節(jié)點受力性能,改善了結(jié)構(gòu)的抗震能力,使得其在地震區(qū)能夠得以應用。因此,以預壓裝配式預應力混凝土框架結(jié)構(gòu)為對象進行研究,對于推廣其在地震區(qū)的應用具有一定的意義。本文主要的研究內(nèi)容如下:(1)設計建立了本文所研究的預壓裝配式預應力混凝土框架結(jié)構(gòu)模型,采用Midas/Gen平臺進行確定性分析為后文的不確定性分析提供基礎。采用非線性動力拆除構(gòu)件法,研究不同部位構(gòu)件發(fā)生初始破壞后結(jié)構(gòu)的動力反應;采用Pushover分析方法,研究完好結(jié)構(gòu)和發(fā)生初始破壞后的損傷結(jié)構(gòu)抗水平地震的能力。(2)采用基于構(gòu)件可靠度的分析方法,對完好結(jié)構(gòu)在地震作用下結(jié)構(gòu)最可能發(fā)生失效的構(gòu)件進行識別。本文將基于拉丁超立方體抽樣的確定性抽樣方法,作為所研究樣本的生成方法,結(jié)合Pushover分析方法對構(gòu)件的抗震能力進行分析,最終得到構(gòu)件在地震作用下的構(gòu)件可靠度。對比各構(gòu)件的分析結(jié)果后,得到地震作用下結(jié)構(gòu)最可能發(fā)生失效的構(gòu)件。(3)采用隨機Pushdown分析方法,分別對完好結(jié)構(gòu)和拆除最可能失效構(gòu)件后的損傷結(jié)構(gòu)進行整體可靠度分析,在不考慮地震作用的前提下得到完好結(jié)構(gòu)及損傷結(jié)構(gòu)的的連續(xù)倒塌可靠度,對損傷結(jié)構(gòu)進行連續(xù)倒塌易損性分析并通過靈敏度分析尋找對結(jié)構(gòu)抗豎向連續(xù)倒塌影響較大的因素。通過場地的地震危險性分析,得到地震作用發(fā)生的概率�；谟嬎闩既蛔饔孟陆Y(jié)構(gòu)發(fā)生連續(xù)倒塌概率的全概率公式,綜合構(gòu)件可靠度分析、條件可靠度分析和場地危險性分析得到的結(jié)果,最終得到地震作用下結(jié)構(gòu)整體發(fā)生連續(xù)倒塌的失效概率,并對結(jié)構(gòu)在地震作用下的抗豎向連續(xù)倒塌魯棒性進行評價分析。根據(jù)最終得到的結(jié)果可知,本文所建立的預壓裝配式預應力混凝土框架結(jié)構(gòu),在地震作用下發(fā)生連續(xù)倒塌的概率較小,具有較好的魯棒性。
[Abstract]:The collapse of Ronan Point apartment in Britain in 1968 made the continuous collapse of building structure begin to be paid attention to by the engineering circles. After decades of research, many research results have been obtained. At the same time, the analysis methods and design suggestions for continuous collapse problems are put forward, and relevant design rules are worked out. However, there are few studies on the continuous collapse resistance of fabricated structures which are widely popularized at present. In this paper, preloading prefabricated prestressed concrete frame structure is taken as an object and reliability analysis method is used to study its continuous collapse resistance under earthquake action. The preloading prefabricated prestressed concrete frame structure can improve the seismic capacity of the prefabricated prestressed concrete frame structure by improving the behavior of the joints of the prefabricated structure, and it can be applied in the earthquake area. Therefore, the study of preloaded prefabricated prestressed concrete frame structure is of great significance for its application in earthquake area. The main contents of this paper are as follows: (1) the model of preloaded prestressed concrete frame structure studied in this paper is designed and established. The deterministic analysis based on Midas/Gen platform is used to provide the basis for the uncertainty analysis later. The dynamic response of structures after initial failure of members in different parts is studied by means of nonlinear dynamic demolition method, and the Pushover analysis method is used. This paper studies the ability of intact structure and damaged structure after initial failure to resist horizontal earthquake. The method based on component reliability is used to identify the components that are most likely to fail under earthquake. In this paper, the deterministic sampling method based on Latin hypercube sampling is used as the generating method of the studied samples, and the seismic capacity of the components is analyzed with the Pushover analysis method. Finally, the reliability of the components under earthquake action is obtained. After comparing the analysis results of each component, it is obtained that the component that is most likely to fail under earthquake action. The random Pushdown analysis method is used to analyze the overall reliability of the intact structure and the damaged structure after removing the most likely failure member. The reliability of continuous collapse of intact structures and damaged structures is obtained without considering earthquake action. The vulnerability of damaged structures to continuous collapse is analyzed and the factors that have a great influence on the vertical continuous collapse resistance of structures are found through sensitivity analysis. Through the seismic hazard analysis of the site, the probability of earthquake action is obtained. Based on the full probability formula for calculating the probability of continuous collapse of structures under accidental action, the results obtained from reliability analysis of composite components, conditional reliability analysis and site hazard analysis, Finally, the failure probability of continuous collapse of the whole structure under earthquake action is obtained, and the robustness of the structure against vertical continuous collapse is evaluated and analyzed. According to the final results, the probability of continuous collapse of the preloaded prefabricated prestressed concrete frame structure established in this paper is small and has good robustness.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU378.4

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