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  本文關(guān)鍵詞： 托梁換柱 加固改造 加固方案優(yōu)化設(shè)計 經(jīng)濟指標 關(guān)鍵因素　出處：《南昌大學》2014年碩士論文　論文類型：學位論文

【摘要】：混凝土結(jié)構(gòu)加固改造技術(shù)發(fā)展至今，已有三四十年的歷史，現(xiàn)已形成一套專業(yè)的加固方法。采用托換技術(shù)進行房屋結(jié)構(gòu)加固改造，只需要拆除部分柱、承重墻，在加固改造期間，對其他構(gòu)件影響較小，基本不影響房屋的正常使用及生產(chǎn)生活。在工程實踐中，常見的加固方法包括增大截面加固法，外粘型鋼加固法，粘貼鋼板加固法，粘貼纖維復合材加固法，外加預應力加固法等方法。本文重點針對以上幾種方法在“托梁換柱”結(jié)構(gòu)改造技術(shù)中的應用進行探討，并在此基礎(chǔ)上探索研究了一種新的桁架式加固形式。 本文結(jié)合某五層框架結(jié)構(gòu)“托梁換柱”結(jié)構(gòu)改造工程進行了研究，提出了局部托換的加固設(shè)計方法和思路。首先，簡要概述了工程背景、加固改造范圍及內(nèi)容，相關(guān)理論分析依據(jù)及基本條件，采用PKPM結(jié)構(gòu)系列軟件建模，對改造前和模擬改造后的工程結(jié)構(gòu)進行整體內(nèi)力計算，分析托換構(gòu)件的受力情況和承載力水平，確定對周邊其他構(gòu)件是否產(chǎn)生影響、影響程度及影響是否可以忽略。 其次，對傳統(tǒng)的加固方案截面承載力計算方法和新設(shè)計的加固方法進行介紹，對改造引起的需要加固的構(gòu)件進行加固方案的優(yōu)化設(shè)計，進行強度校核。 再次，通過ABAQUS有限元分析軟件對各種加固方案進行局部受力分析，對需要加固構(gòu)件的變形進行計算和對比。綜合比較各種方案的技術(shù)可行性、經(jīng)濟性指標及各種方案的施工可行性，總結(jié)了各種托換加固改造方法的特點及適用范圍。 最后，選擇出適用于本工程的局部托換改造方法——粘貼鋼板加固法。針對粘貼鋼板加固法中影響粘接效果的關(guān)鍵因素如粘結(jié)膠的剛度和厚度、鋼板的厚度進行了局部有限元分析。粘結(jié)膠的厚度對粘貼鋼板加固法的加固效果有很大的影響，本文建議粘結(jié)膠的厚度取2～3mm，，建議粘貼鋼板的厚度取3～6mm，并在加固設(shè)計中，按最大剪應力對鋼板厚度進行驗算。
[Abstract]:The technology of strengthening and reforming concrete structure has been developed for 30 to 40 years, and a set of professional reinforcement methods have been formed. Only some columns and load-bearing walls need to be removed to carry out the reinforcement and reconstruction of housing structures by means of underpinning technology. During the period of strengthening and rebuilding, it has little influence on other members, and basically does not affect the normal use and production life of buildings. In engineering practice, the common reinforcement methods include the reinforcement method of increasing cross-section and the method of strengthening steel with external adhesion. The paper mainly discusses the application of the above methods in the reconstruction technology of "supporting beam and changing column" structure, such as the method of strengthening with steel plate, the method of strengthening with fiber composite material and the method of strengthening with external prestressing force. On this basis, a new type of truss reinforcement is studied. In this paper, a five-story frame structure "beam replacement column" structural transformation project is studied, and the reinforcement design method and idea of local support replacement are put forward. Firstly, the engineering background is briefly summarized. The scope and content of the reinforcement and transformation, the relevant theoretical analysis basis and basic conditions, using the PKPM structure series of software modeling, before and after the simulation of the transformation of the engineering structure of the overall internal force calculation. The stress and bearing capacity level of underpinning members are analyzed to determine whether the influence on other components around it, the degree of influence and whether the influence can be neglected. Secondly, the traditional calculation method of section bearing capacity and the newly designed reinforcement method are introduced, and the optimization design of strengthening scheme is carried out to check the strength of the members that need to be strengthened. Thirdly, through the ABAQUS finite element analysis software to carry on the local force analysis to each kind of reinforcement plan, carries on the computation and the contrast to the need to strengthen the member's deformation, and synthetically compares each kind of plan's technical feasibility. Economic indexes and construction feasibility of various schemes are summarized, and the characteristics and scope of application of various methods of underpinning reinforcement and reconstruction are summarized. Finally, the local underpinning method, which is suitable for this project, is selected. The key factors such as the stiffness and thickness of adhesive adhesive are discussed in view of the key factors that affect the bonding effect in the method of bonding steel plate reinforcement. The thickness of steel plate is analyzed by local finite element method. The thickness of adhesive has a great influence on the strengthening effect of steel plate. This paper suggests that the thickness of adhesive is 2mm. It is suggested that the thickness of steel plate should be 3 mm and 6 mm, and the thickness of steel plate should be checked according to the maximum shear stress in the reinforcement design.
【學位授予單位】：南昌大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU746.3

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