本文選題：鋼筋混凝土框架結(jié)構(gòu) + 填充墻　； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：建筑結(jié)構(gòu)在遭受地震或者偶然荷載情況下,很容易造成結(jié)構(gòu)發(fā)生局部破壞,最終導(dǎo)致整個(gè)建筑發(fā)生連續(xù)性倒塌,所以建筑結(jié)構(gòu)的抗連續(xù)性倒塌能力在工程領(lǐng)域受到高度關(guān)注。以前工程人員主要研究建筑結(jié)構(gòu)在遭受地震作用下是否發(fā)生破壞,而對(duì)建筑結(jié)構(gòu)抗連續(xù)性倒塌的研究在我國起步較晚,而且主要集中在對(duì)純鋼筋混凝土框架結(jié)構(gòu)的研究。填充墻作為鋼筋混凝土框架結(jié)構(gòu)重要的一部分,工程人員往往在設(shè)計(jì)中簡單的只考慮填充墻的荷載作用或者僅對(duì)框架結(jié)構(gòu)的周期進(jìn)行折減,這樣的處理方法明顯沒有考慮到填充墻在框架結(jié)構(gòu)抗連續(xù)性倒塌中的作用。因此本文對(duì)純框架結(jié)構(gòu)和考慮填充墻影響的框架結(jié)構(gòu)進(jìn)行抗倒塌分析,通過對(duì)比其拆柱節(jié)點(diǎn)的豎向位移、梁和柱內(nèi)力變化情況等來分析填充墻對(duì)鋼筋混凝土框架抗連續(xù)性倒塌的影響。具體研究內(nèi)容如下:(1)采用PKPM結(jié)構(gòu)設(shè)計(jì)軟件按照我國相關(guān)結(jié)構(gòu)規(guī)范設(shè)計(jì)一棟六層鋼筋混凝土框架結(jié)構(gòu),然后以sap2000有限元分析軟件為平臺(tái)建立三維模型。采用備用路徑法對(duì)不考慮填充墻影響的框架結(jié)構(gòu)進(jìn)行線性靜力分析,通過數(shù)據(jù)分析可以得出:按照我國現(xiàn)行的設(shè)計(jì)規(guī)范設(shè)計(jì)的鋼筋混凝土框架具有一定的抗連續(xù)性倒塌能力,只有在拆除內(nèi)柱后剩余結(jié)構(gòu)才會(huì)發(fā)生連續(xù)性倒塌。(2)對(duì)不考慮填充墻影響的框架模型,拆柱節(jié)點(diǎn)的位移大小為:內(nèi)柱長邊中柱短邊中柱角柱。當(dāng)拆除內(nèi)柱時(shí),節(jié)點(diǎn)豎向位移持續(xù)增大,剩余結(jié)構(gòu)會(huì)發(fā)生連續(xù)性倒塌。對(duì)于填充墻框架模型,拆柱節(jié)點(diǎn)的位移大小關(guān)系和純框架模型一樣,只是考慮填充的影響其節(jié)點(diǎn)豎向位移明顯減小,位移曲線波動(dòng)更平穩(wěn)。(3)通過對(duì)比梁、柱內(nèi)力時(shí)程曲線,填充墻框架模型梁和柱承受的內(nèi)力比純框架模型更少,而且內(nèi)力時(shí)程曲線波動(dòng)更為平穩(wěn)。距離拆除柱較近的梁和柱內(nèi)力時(shí)程曲線波動(dòng)明顯比距離較遠(yuǎn)的梁和柱更劇烈,由此可以看出拆除柱之后產(chǎn)生的動(dòng)力效應(yīng),基本以拆除柱為中心,向四周逐漸減弱。(4)考慮填充墻影響的框架結(jié)構(gòu)相比純框架結(jié)構(gòu),不僅可以減少節(jié)點(diǎn)豎向位移、減少梁柱所承受的內(nèi)力,還可以減弱塑性鉸的發(fā)展程度。這充分說明填充墻可以承擔(dān)部分豎向荷載,還能使失效柱范圍內(nèi)的荷載通過更廣泛的路徑傳遞給其他構(gòu)件,提高了鋼筋混凝土框架的抗倒塌能力。
[Abstract]:In the case of earthquake or accidental load, the structure is prone to local destruction, which leads to the continuous collapse of the whole building. Therefore, the ability of building structure to resist continuous collapse is highly concerned in the field of engineering. In the past, engineers mainly studied whether the building structure was damaged by earthquake, but the research on the continuous collapse of building structure started late in our country, and mainly focused on the study of pure reinforced concrete frame structure. As an important part of reinforced concrete frame structure, infilled wall is usually designed by engineers simply considering the load of infilled wall or only reducing the period of frame structure. This method obviously fails to consider the role of infilled walls in the continuous collapse of frame structures. Therefore, the anti-collapse analysis of pure frame structure and frame structure considering the influence of infilled wall is carried out, and the vertical displacement of the column breaking joint is compared. The influence of infilled walls on the continuous collapse of reinforced concrete frames is analyzed by changing the internal forces of beams and columns. The specific research contents are as follows: (1) A six-story reinforced concrete frame structure is designed according to the relevant structural codes of our country by using PKPM structural design software, and then the three-dimensional model is established on the platform of sap2000 finite element analysis software. The linear static analysis of frame structure without the influence of infilled wall is carried out by the method of spare path. Through the data analysis, it can be concluded that the reinforced concrete frame designed according to the current design code of our country has the ability of resisting continuous collapse to a certain extent. Only after removing the inner column will the residual structure collapse continuously. 2) for the frame model which does not consider the effect of the infilled wall, the displacement of the disassembled column joint is: the angle column of the long side column with the short side column of the inner column. When the internal column is removed, the vertical displacement of the joint increases continuously and the residual structure collapses continuously. For the infilled wall frame model, the displacement relation of column breaking joint is the same as that of pure frame model, only considering the effect of filling, the vertical displacement of the joint is obviously reduced, and the fluctuation of displacement curve is more stable. 3) by comparing beam, the time history curve of column internal force is obtained. The internal force of beam and column in infilled wall frame model is less than that in pure frame model, and the fluctuation of time history curve of internal force is more stable. The fluctuation of the time history curve of the internal force of the beam and column closer to the dismantled column is obviously more intense than that of the beam and column which is far away. From this, it can be seen that the dynamic effect after removing the column is basically centered on the dismantled column. Compared with the pure frame structure the vertical displacement of joints and the internal force of Liang Zhu can be reduced and the development degree of plastic hinge can be weakened. This fully shows that the infilled wall can bear some vertical loads and the load in the range of failure columns can be transferred to other members through a more extensive path, thus improving the collapse resistance of reinforced concrete frames.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU375.4

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