本文關(guān)鍵詞：高層鋼筋混凝土框架結(jié)構(gòu)加固方法優(yōu)化設(shè)計研究　出處：《長沙理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 高層鋼筋混凝土框架 結(jié)構(gòu)加固 有限元模型 模糊綜合評判 加固方案優(yōu)化分析

【摘要】：隨著我國經(jīng)濟穩(wěn)定發(fā)展，建筑工程的重點慢慢從大規(guī)模新建工程轉(zhuǎn)向新建、維修與改造共同進行。城市發(fā)展開始往城鎮(zhèn)與郊區(qū)發(fā)展，而城市中心的建筑開始老化或滿足不了使用需求，因此出現(xiàn)了越來越多的加固改造項目。結(jié)構(gòu)加固方法多種多樣，在工程中由于方案選擇不當(dāng)而造成嚴(yán)重后果的事例屢見不鮮，因此如何保證加固方案的技術(shù)性可靠、經(jīng)濟上合理、安全性最佳，如何進行加固方案的最優(yōu)化選擇與設(shè)計，是一直困擾工程設(shè)計的難題。 目前加固計算還僅限于按照規(guī)范進行手算或者應(yīng)用小型計算軟件進行單根構(gòu)件的計算，原因主要在于程序中定義或輸入加固材料的本構(gòu)關(guān)系較為困難，這已不滿足現(xiàn)在越來越復(fù)雜的建筑結(jié)構(gòu)。如何能將加固材料性能輸入結(jié)構(gòu)計算模型，將加固融合進復(fù)雜結(jié)構(gòu)模型整體計算中，是一直以來設(shè)計人員努力的方向。，解決這一問題將極大增強加固計算的可靠性，方便設(shè)計人員進行加固設(shè)計。 本文對高層鋼筋混凝土框架結(jié)構(gòu)的加固方法、加固計算及加固方案優(yōu)化設(shè)計方法進行了研究和分析，主要工作內(nèi)容如下： 1.闡述了體系加固的概念，指出現(xiàn)階段加固設(shè)計與研究的局限性，提出了加固后結(jié)構(gòu)體系計算的新思路與計算方法； 2.使用PKPM鑒定加固模塊，引入加固材料本構(gòu)關(guān)系，解決了加固計算中材料性能輸入的問題，建立了加固后高層鋼筋混凝土框架結(jié)構(gòu)有限元計算模型，并進行了加固后結(jié)構(gòu)體系計算分析。對長沙某商業(yè)大樓加固改造實例進行了對比計算，得到不同加固方法對結(jié)構(gòu)體系的不同響應(yīng)； 3.采用增大截面法、外包型鋼法、置換混凝土法、粘帖鋼板法、粘帖FRP法等不同方法對高層框架結(jié)構(gòu)加固改造進行計算、分析及比較，得出增大截面法對梁撓度的降低最為明顯，粘帖鋼板法與粘帖FRP法對降低梁計算配筋效果明顯及增大截面法對綜合抗震能力指數(shù)有明顯提高等有益結(jié)論； 4.本文提出高層框架結(jié)構(gòu)加固方案優(yōu)化的模糊綜合評判方法，確定了評價體系因素集，定義隸屬函數(shù)解決了評判中非確定性、難以量化因素的評價等級問題，建立了模糊評判矩陣，從力學(xué)性能、施工便捷性、經(jīng)濟性三方面對不同加固方案進行模糊綜合評判及優(yōu)化分析。本文優(yōu)化分析方法可為同類工程提供參考和依據(jù)。
[Abstract]:With the steady development of our country's economy, the emphasis of the construction project is slowly changing from the large-scale new construction to the new construction, and the maintenance and renovation are carried out together. The urban development begins to develop into the towns and the suburbs. But the buildings in the city center are aging or can not meet the needs of use, so there are more and more reinforcement projects. In the project due to improper selection of the project due to serious consequences of the case is common, so how to ensure the technical reliability of the reinforcement scheme, economically reasonable, the best security. How to optimize the selection and design of reinforcement schemes has been a difficult problem in engineering design. At present, the reinforcement calculation is limited to the manual calculation according to the code or the calculation of a single member by using the small calculation software. The main reason is that it is difficult to define or input the constitutive relation of the reinforcement material in the program. This is not satisfied with the more and more complex building structure now. How to input the performance of the reinforcement materials into the structural calculation model and integrate the reinforcement into the whole calculation of the complex structure model. Solving this problem will greatly enhance the reliability of the reinforcement calculation and facilitate the designers to carry out the reinforcement design. In this paper, the reinforcement method, reinforcement calculation and optimization design method of high-rise reinforced concrete frame structure are studied and analyzed. The main work is as follows: 1. This paper expounds the concept of system reinforcement, points out the limitation of reinforcement design and research at present, and puts forward a new idea and calculation method for the calculation of reinforced structure system. 2.Using PKPM identification and strengthening module, introducing the constitutive relation of strengthening material, solving the problem of material performance input in reinforcement calculation, and establishing the finite element calculation model of reinforced concrete frame structure after reinforcement. The calculation and analysis of the reinforced structure system are carried out. The comparison calculation of a commercial building reinforcement and reconstruction example in Changsha is carried out, and the different responses of different reinforcement methods to the structure system are obtained. 3. The reinforcement and reconstruction of high-rise frame structure are calculated, analyzed and compared by different methods, such as the method of increasing section, the method of steel section, the method of replacement concrete, the method of sticking steel plate and the method of FRP. The results show that the beam deflection is decreased most obviously by increasing section method, the effect of bonding steel plate method and FRP method on reducing beam reinforcement is obvious, and the increasing section method can obviously increase the comprehensive seismic capacity index. 4. In this paper, a fuzzy comprehensive evaluation method is proposed to optimize the reinforcement scheme of high-rise frame structure, the evaluation system factor set is determined, and the non-deterministic evaluation is solved by defining membership function. It is difficult to quantify the evaluation grade of factors, and a fuzzy evaluation matrix is established, which is based on mechanical properties and construction convenience. Fuzzy comprehensive evaluation and optimization analysis of different reinforcement schemes are carried out in three aspects of economy. The optimization analysis method in this paper can provide reference and basis for similar projects.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU973.15

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