本文選題：底框-砌體結(jié)構(gòu) + 不均勻沉降��； 參考：《湖南大學(xué)》2015年碩士論文

【摘要】：不均勻沉降是一項(xiàng)常見的工程事故。由于我國(guó)大規(guī)模的基本建設(shè),可用于建設(shè)的土地不斷減少,很多建筑物不可避免地坐落于不良地基上,加上其他各種原因,房屋發(fā)生不均勻沉降事故的現(xiàn)象一直難以杜絕。一旦發(fā)生較大的不均勻沉降,房屋將會(huì)出現(xiàn)開裂、傾斜、變形甚至倒塌等破壞,造成生命財(cái)產(chǎn)的損失。關(guān)于不均勻沉降的原因和防治方法,目前國(guó)內(nèi)外都有了比較多的研究,也取得了很好的工程應(yīng)用價(jià)值。房屋不均勻沉降變形和破壞,是地基基礎(chǔ)和上部結(jié)構(gòu)共同作用、內(nèi)力重分布和協(xié)調(diào)變形的結(jié)果。目前,關(guān)于地基基礎(chǔ)與上部結(jié)構(gòu)共同作用的研究中,大部分以混凝土框架結(jié)構(gòu)或鋼框架結(jié)構(gòu)為研究對(duì)象,砌體結(jié)構(gòu)由于其材料力學(xué)性能的復(fù)雜性,針對(duì)其的研究較少。為此,本文基于有限元法對(duì)地基基礎(chǔ)與上部結(jié)構(gòu)的共同作用進(jìn)行研究,深入地分析了底框-砌體結(jié)構(gòu)中上部墻體剛度對(duì)不均勻沉降影響。本文首先介紹了國(guó)內(nèi)外不均勻沉降的工程情況,并綜述了不均勻沉降的研究現(xiàn)狀。從地基、結(jié)構(gòu)等方面總結(jié)房屋發(fā)生不均勻沉降的主要原因,闡述不均勻沉降所導(dǎo)致的房屋破壞特征。接著本文探討和分析了砌體結(jié)構(gòu)有限元模型的建立方法、單元類型選擇、材料性質(zhì)和相關(guān)參數(shù)設(shè)定及模型基本假定等。并對(duì)典型的底框-砌體結(jié)構(gòu)不均勻沉降形式進(jìn)行了介紹。本文重點(diǎn)研究了底框-砌體結(jié)構(gòu)上部墻體剛度對(duì)不均勻沉降的影響。建立了在重力荷載下底框-砌體結(jié)構(gòu)與地基基礎(chǔ)共同作用的三維簡(jiǎn)化模型,在5種典型不均勻沉降形態(tài)的基礎(chǔ)上,分析框架柱沉降和軸力對(duì)上部墻體剛度的響應(yīng)特性。上部墻體剛度的調(diào)整通過改變墻體彈性模量(E)實(shí)現(xiàn)。研究結(jié)果表明,無論是中柱、角柱還是端柱沉降較大,通過提高上部墻體剛度都能降低基礎(chǔ)沉降的不均勻性,且提高第2層墻體剛度時(shí)不均勻沉降改善效果最好。歸納在勘察、設(shè)計(jì)等階段預(yù)防和控制不均勻沉降的常見措施,總結(jié)既有房屋不均勻沉降事故的治理對(duì)策,其中包括地基基礎(chǔ)和上部結(jié)構(gòu)的處理措施。指出墻體加固方案的確定不僅需要考慮加固完成后的效果,還需要考慮到經(jīng)濟(jì)環(huán)保方面的問題,如果對(duì)所有開裂墻體都進(jìn)行加固處理,將導(dǎo)致成本過高以及資源的浪費(fèi)。研究了鋼筋網(wǎng)復(fù)合砂漿面層加固法對(duì)組合墻體彈性模量的影響,結(jié)果表明,該加固法能有效提高組合墻體彈性模量,從另一方面表明了鋼筋網(wǎng)復(fù)合砂漿面層加固法改善不均勻沉降的可行性。本文最后部分介紹了某底框-砌體結(jié)構(gòu)不均勻沉降事故的處理案例。詳細(xì)分析了事故原因,并結(jié)合本文相關(guān)內(nèi)容提出了綜合加固處理方案,對(duì)地基、基礎(chǔ)和上部結(jié)構(gòu)等進(jìn)行了加固處理,為類似事故治理提供借鑒。
[Abstract]:Uneven settlement is a common engineering accident.Because of the large scale capital construction in our country, the land that can be used for construction is decreasing constantly, many buildings are inevitably located on the bad foundation, and other reasons, the phenomenon of uneven settlement accident of the house has been difficult to eliminate all the time.Once a large uneven settlement occurs, the house will be cracked, inclined, deformed or even collapsed, resulting in loss of life and property.There are many researches on the causes and prevention methods of uneven settlement at home and abroad, and good engineering application value has been obtained.The uneven settlement and failure of buildings are the result of the joint action of foundation and superstructure, the redistribution of internal force and the coordinated deformation.At present, most of the researches on the interaction between foundation and superstructure take concrete frame structure or steel frame structure as the object of study, but the research on masonry structure is less due to the complexity of its mechanical properties of materials.Therefore, based on the finite element method, the interaction between foundation and superstructure is studied, and the effect of upper wall stiffness on uneven settlement of bottom frame-masonry structure is deeply analyzed.This paper first introduces the engineering situation of uneven settlement at home and abroad, and summarizes the research status of uneven settlement.The main causes of uneven settlement of buildings are summarized from the aspects of foundation and structure, and the damage characteristics of buildings caused by uneven settlement are expounded.Then this paper discusses and analyzes the building method of the finite element model of masonry structure, the selection of element type, the setting of material properties and related parameters, and the basic assumptions of the model, etc.The typical non-uniform settlement of bottom-frame-masonry structure is introduced.This paper focuses on the influence of the upper wall stiffness of the bottom frame-masonry structure on the uneven settlement.A three-dimensional simplified model for the interaction between bottom frame-masonry structure and foundation under gravity load is established. On the basis of five typical non-uniform settlement patterns, the response characteristics of frame column settlement and axial force to the stiffness of upper wall are analyzed.The stiffness of the upper wall is adjusted by changing the elastic modulus of the wall.The results show that the settlement of the upper wall can be reduced by increasing the stiffness of the upper wall, and the effect of uneven settlement is the best when the stiffness of the second floor wall is increased.The common measures to prevent and control uneven settlement in the stages of investigation and design are summarized, and the treatment measures of uneven settlement of existing buildings are summarized, including the treatment measures of foundation and superstructure.It is pointed out that the determination of wall reinforcement scheme should not only consider the effect of reinforcement, but also take into account the problems of economic and environmental protection. If all cracked walls are strengthened, the cost will be too high and the resources will be wasted.The effect of reinforcement method on the elastic modulus of composite wall is studied. The results show that the reinforcement method can effectively improve the elastic modulus of composite wall.On the other hand, it shows the feasibility of reinforcing reinforced mesh composite mortar surface layer to improve uneven settlement.In the last part of this paper, the case of uneven settlement of bottom frame-masonry structure is introduced.The cause of the accident is analyzed in detail, and combined with the relevant contents of this paper, the comprehensive reinforcement treatment scheme is put forward, and the foundation, foundation and superstructure are strengthened, so as to provide reference for similar accident treatment.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU433;TU364

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 宋小園;申向東;李紅云;趙振亞;;摻礦粉水泥砂漿早期彈性模量的研究[J];硅酸鹽通報(bào);2013年10期

2 楊富;李俊;王玉洲;;某住宅樓不均勻沉降事故的檢測(cè)鑒定與加固處理[J];陜西建筑;2013年10期

3 羅文;謝孝;陳進(jìn);;某綜合樓檢測(cè)鑒定與結(jié)構(gòu)加固處理[J];四川建筑;2012年06期

4 崔立苒;孫寶山;鹿群;;基礎(chǔ)不均勻沉降引起的上部結(jié)構(gòu)裂縫分析[J];河北工程大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年03期

5 葉強(qiáng);張清華;吳慶令;;某綜合樓的裂縫檢測(cè)與結(jié)構(gòu)加固[J];建筑結(jié)構(gòu);2010年S2期

6 唐淑暉;;某工廠地基不均勻沉降原因分析及綜合處理措施[J];四川建材;2010年03期

7 張永波;孫政剛;;地基不均勻沉降引起墻體裂縫原因分析及防治措施[J];黑龍江科技信息;2010年15期

8 李愛飛;;某大樓地基不均勻沉降的原因分析及其處理[J];中國(guó)高新技術(shù)企業(yè);2010年09期

9 李鑫;王冬;;淺談建筑物不均勻沉降現(xiàn)象的分析與處理[J];黑龍江科技信息;2009年20期

10 王盛琳;;建筑物地基不均勻沉降的防治措施[J];中國(guó)新技術(shù)新產(chǎn)品;2009年13期

相關(guān)博士學(xué)位論文 前1條

1 王汝恒;巨型框架結(jié)構(gòu)—筏基—砂卵石地基的靜動(dòng)力共同作用研究[D];重慶大學(xué);2009年

相關(guān)碩士學(xué)位論文 前10條

1 戴如之;水平嵌筋加固砌體墻開裂性能的有限元分析[D];中國(guó)海洋大學(xué);2014年

2 趙欣;不均勻沉降對(duì)砌體結(jié)構(gòu)的影響分析[D];濟(jì)南大學(xué);2014年

3 由健;砌體結(jié)構(gòu)不均勻沉降裂縫的有限元分析[D];中國(guó)海洋大學(xué);2014年

4 孫曉莉;單獨(dú)基礎(chǔ)不均勻變形對(duì)上部框架結(jié)構(gòu)內(nèi)力影響的研究[D];濟(jì)南大學(xué);2012年

5 黃立;庫岸邊坡穩(wěn)定性特征及邊坡房屋不均勻沉降裂縫分析[D];中南大學(xué);2012年

6 高自理;地基不均勻沉降對(duì)上部框架結(jié)構(gòu)的影響分析[D];武漢理工大學(xué);2008年

7 王永虎;噴射GFRP抗剪加固無筋砌體開洞墻片的有限元分析[D];武漢理工大學(xué);2008年

8 劉麗;噴射玻璃纖維聚合物加固無筋砌體墻的抗剪性能研究[D];武漢理工大學(xué);2008年

9 劉建輝;云南崇圣寺三塔塔基變形分析及糾偏方案研究[D];中國(guó)地質(zhì)大學(xué);2008年

10 徐劍波;地基不均勻沉降對(duì)房屋的危害分析及治理對(duì)策研究[D];湖南大學(xué);2006年

，

本文編號(hào)：1734343