【摘要】：改革開(kāi)放以來(lái),我國(guó)的經(jīng)濟(jì)有了飛速的發(fā)展,各種新型結(jié)構(gòu)不斷創(chuàng)造出來(lái)且得到了很好的發(fā)展,并已經(jīng)運(yùn)用到各個(gè)領(lǐng)域,其中大跨度空間鋼結(jié)構(gòu)是發(fā)展應(yīng)用最快的結(jié)構(gòu)形式之一,如國(guó)家大劇院、國(guó)家游泳中心等標(biāo)志性建筑�，F(xiàn)價(jià)段對(duì)于大跨度空間鋼結(jié)構(gòu)的前期結(jié)構(gòu)設(shè)計(jì),就是單純的對(duì)結(jié)構(gòu)建造完成后的整體進(jìn)行計(jì)算,對(duì)結(jié)構(gòu)在施工過(guò)程中可能出現(xiàn)的一些不確定性因素考慮不多,這也是現(xiàn)在大跨復(fù)雜結(jié)構(gòu)在施工過(guò)程中事故高發(fā)生率的主要原因之一。大跨度復(fù)雜結(jié)構(gòu)由于造型很復(fù)雜、施工周期跨度較大,施工過(guò)程中各種不確定性因素可能引起結(jié)構(gòu)內(nèi)力和應(yīng)力以及位移變化的影響很難估計(jì),所以對(duì)大跨度空間鋼結(jié)構(gòu)的施工全過(guò)程進(jìn)行數(shù)值模擬分析和監(jiān)測(cè),是非常有必要的。這樣可以預(yù)測(cè)和跟蹤結(jié)構(gòu)在施工過(guò)程中的內(nèi)力和應(yīng)力及位移變化,保證結(jié)構(gòu)的安全性和與設(shè)計(jì)的盡量一致性。主要從以下方面作了分析研究:1、介紹了大跨度空間鋼結(jié)構(gòu)的發(fā)展以及國(guó)內(nèi)外的現(xiàn)狀,并對(duì)復(fù)雜空間鋼結(jié)構(gòu)的優(yōu)缺點(diǎn)進(jìn)行介紹,然后介紹了本文的主要研究?jī)?nèi)容;2、分析介紹了空間鋼結(jié)構(gòu)的幾種安裝施工方法,簡(jiǎn)單介紹了每一種安裝施工方法的優(yōu)缺點(diǎn),并對(duì)這幾種安裝方法進(jìn)行了比較分析。然后結(jié)合廬江體育館的工程狀況,確定了適用于本工程的安裝方法;3、介紹了施工過(guò)程分析理論與常用的幾種數(shù)值分析方法,然后介紹了軟件MIDAS/Gen的模擬分析原理,并對(duì)廬江縣體育館鋼結(jié)構(gòu)桁架安裝施工的全過(guò)程進(jìn)行了數(shù)值模擬;4、運(yùn)用MIDAS/Gen軟件對(duì)整體在自重作用下進(jìn)行分析,選取最有代表性的第五榀桁架、第六榀桁架和第七榀桁架為一個(gè)單元進(jìn)行全過(guò)程施工模擬分析,研究幾個(gè)有代表性的測(cè)點(diǎn)的內(nèi)力、應(yīng)力和位移的變化,得出都在規(guī)范值之內(nèi),說(shuō)明上述確定的安裝方案是可行的;5、對(duì)實(shí)測(cè)應(yīng)力應(yīng)變及位移數(shù)據(jù)進(jìn)行整理,然后與模擬分析結(jié)果作比較分析,得出結(jié)構(gòu)施工全過(guò)程數(shù)值模擬的準(zhǔn)確性與結(jié)構(gòu)的安全性,并分析了兩者存在的差別原因,為以后此類結(jié)構(gòu)的研究提供了一定的參考。綜上,本文對(duì)大跨度復(fù)雜空間鋼結(jié)構(gòu)施工全過(guò)程模擬分析與監(jiān)測(cè)可以為以后同類結(jié)構(gòu)的研究提供很好的參考。圖:68表:5參:54
[Abstract]:Since the reform and opening up, the economy of our country has developed rapidly, various new structures have been created constantly and have been developed very well, and have been applied to various fields. Among them, large span spatial steel structure is one of the fastest applied structural forms, such as National Grand Theater, National Swimming Center and other landmarks. The present price section is a simple calculation of the whole structure after the completion of the construction of the large-span spatial steel structure, and some uncertain factors that may appear in the construction process are not considered much. This is also one of the main reasons for the high incidence of accidents in the construction of large span complex structures. Due to the complexity of modeling and the long span of construction period, it is difficult to estimate the influence of various uncertain factors during construction on the variation of internal force, stress and displacement of long-span complex structures. So it is necessary to simulate and monitor the whole construction process of long span space steel structure. In this way, the internal force, stress and displacement of the structure in the construction process can be predicted and tracked, and the safety of the structure and the consistency with the design as far as possible can be ensured. This paper analyzes and studies the following aspects: 1, introduces the development of large-span spatial steel structures and the present situation at home and abroad, and introduces the advantages and disadvantages of complex spatial steel structures. Then it introduces the main research content of this paper, analyzes and introduces several installation and construction methods of spatial steel structure, briefly introduces the advantages and disadvantages of each installation construction method, and makes a comparative analysis of these installation methods. Then according to the engineering situation of Lujiang Gymnasium, the installation method is determined, the theory of construction process analysis and several common numerical analysis methods are introduced, and the simulation and analysis principle of software MIDAS/Gen is introduced. The whole process of steel truss installation and construction in Lujiang Gymnasium is numerically simulated. The fifth truss, which is the most representative truss, is analyzed by using MIDAS/Gen software under the action of self-weight. The sixth truss and the seventh truss are used as a unit to simulate the whole process of construction. The variation of internal force, stress and displacement of several representative measuring points is studied. The above determined installation scheme is feasible. The measured data of stress, strain and displacement are sorted out, then compared with the results of simulation analysis, the accuracy of numerical simulation and the safety of the structure during the whole process of construction are obtained. The reason of the difference between them is analyzed, which provides a reference for the study of this kind of structure in the future. In summary, this paper can provide a good reference for the research of similar structures in the future. Fig. 68 Table 5 refs: 54
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU758.11

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本文編號(hào)：2218991