本文關(guān)鍵詞： 連續(xù)梁橋 混合整型二次規(guī)劃法 優(yōu)化設(shè)計(jì)　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：摘要：PC連續(xù)梁橋傳統(tǒng)的設(shè)計(jì)步驟：根據(jù)橋梁跨度、橋?qū)捈笆┕し椒ǖ然緱l件,初步擬定結(jié)構(gòu)細(xì)部尺寸,計(jì)算結(jié)構(gòu)內(nèi)力,預(yù)估預(yù)應(yīng)力束數(shù)量并進(jìn)行布置,再重新進(jìn)行結(jié)構(gòu)計(jì)算并按照相應(yīng)規(guī)范進(jìn)行檢算。由于估束時(shí)不能準(zhǔn)確計(jì)算預(yù)應(yīng)力損失及預(yù)應(yīng)力引起的結(jié)構(gòu)次內(nèi)力,也不能準(zhǔn)確考慮預(yù)應(yīng)力的偏心位置等因素,預(yù)估的預(yù)應(yīng)力束數(shù)量是十分粗略的,設(shè)計(jì)時(shí)就需要不斷調(diào)整預(yù)應(yīng)力束,甚至需要修改梁截面尺寸直至獲得滿意的設(shè)計(jì)為止。由于在此反復(fù)試算及調(diào)整過程中涉及很多設(shè)計(jì)參數(shù)及控制條件,設(shè)計(jì)師很難使設(shè)計(jì)方案既受力合理又造價(jià)經(jīng)濟(jì),在經(jīng)過有限次數(shù)的試算調(diào)整后得到的設(shè)計(jì)是一個(gè)可行的但未必是較優(yōu)的方案。 針對(duì)傳統(tǒng)設(shè)計(jì)方法的不足,在前人研究成果基礎(chǔ)上,本文提出一種PC連續(xù)箱梁橋優(yōu)化設(shè)計(jì)的新方法：將估束、布束和成橋計(jì)算三個(gè)階段結(jié)合起來,考慮各參數(shù)之間相互耦合及相容條件,基于優(yōu)化理論實(shí)現(xiàn)連續(xù)箱梁的初步設(shè)計(jì)。本文主要內(nèi)容有： 1.采用混合整型二次規(guī)劃算法(MINLPB)進(jìn)行優(yōu)化計(jì)算,通過算例對(duì)MINPLB優(yōu)化程序的有效性及可靠性進(jìn)行驗(yàn)證。 2.以梁部主要尺寸、鋼束數(shù)量及位置為變量,分別建立估束階段、布束階段及成橋階段優(yōu)化模型,實(shí)現(xiàn)PC連續(xù)箱梁初步設(shè)計(jì)。 3.利用本文的優(yōu)化設(shè)計(jì)方法及編制的程序?qū)︸缢畼蜻M(jìn)行優(yōu)化設(shè)計(jì),驗(yàn)證了本文優(yōu)化設(shè)計(jì)方法。 本文提出的PC連續(xù)箱梁優(yōu)化設(shè)計(jì)方法不僅克服了傳統(tǒng)設(shè)計(jì)反復(fù)試算的缺點(diǎn),而且彌補(bǔ)了先前優(yōu)化設(shè)計(jì)的不足,可以得出截面尺寸與鋼束數(shù)量的最優(yōu)配置,自動(dòng)繪制出鋼束立面圖,完成PC連續(xù)箱梁橋的初步設(shè)計(jì),具有實(shí)際的工程意義及理論價(jià)值。圖32幅,表13個(gè),參考文獻(xiàn)62篇
[Abstract]:According to the basic conditions of bridge span, bridge width and construction method, the detail size of the structure is preliminarily drawn up, the internal force of the structure is calculated, the number of prestressing tendons is estimated and arranged. Then the structure is calculated again and checked according to the corresponding code. Because the loss of prestress and the secondary internal force caused by prestress can not be calculated accurately, and the eccentricity position of prestress can not be considered accurately, The estimated number of prestressing tendons is very rough, and it is necessary to constantly adjust the prestressing tendons in the design. It is even necessary to modify the section size of the beam until the satisfactory design is obtained. Since many design parameters and control conditions are involved in the repeated trial calculation and adjustment process, it is very difficult for the designer to make the design plan both reasonable in force and economical in cost. After a finite number of trial calculations, the design is a feasible but not necessarily better scheme. In view of the shortcomings of traditional design methods, a new method for optimizing the design of PC continuous box girder bridges is proposed in this paper, which combines the three stages of beam estimation, bundle placement and bridge completion calculation, based on the previous research results. Considering the conditions of mutual coupling and compatibility among the parameters, the primary design of continuous box girder is realized based on the optimization theory. The main contents of this paper are as follows:. 1. The hybrid integer quadratic programming algorithm (MINLPB) is used to optimize the program. The validity and reliability of the MINPLB optimization program are verified by an example. 2. Taking the main size of beam, the quantity and position of steel bundles as variables, the optimization models of beam estimation stage, bundle arrangement stage and bridge completion stage are established, respectively, to realize the preliminary design of PC continuous box girder. 3. The optimal design method of Leishui Bridge is verified by using the optimization design method and the program compiled in this paper. The PC continuous box girder optimization design method proposed in this paper not only overcomes the shortcomings of traditional design and repeated trial calculation, but also makes up for the shortcomings of previous optimization design. The optimal configuration of section size and steel beam number can be obtained. It is of practical engineering significance and theoretical value to draw the steel beam elevation drawing automatically and to complete the preliminary design of PC continuous box girder bridge. 32 drawings, 13 tables and 62 references are given.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.5;U448.213

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 劉桂生,孫國(guó)柱;懸臂施工連續(xù)梁(剛構(gòu))預(yù)應(yīng)力優(yōu)化設(shè)計(jì)[J];廣東公路交通;2000年S1期

2 蔡鑒明;;論Auto CAD與FORTRAN語(yǔ)言接口[J];長(zhǎng)沙鐵道學(xué)院學(xué)報(bào);1990年02期

3 姜新佩,胡浩云,郭鳳臺(tái);預(yù)應(yīng)力混凝土構(gòu)件的優(yōu)化設(shè)計(jì)[J];華北水利水電學(xué)院學(xué)報(bào);1998年02期

4 肖汝誠(chéng);預(yù)應(yīng)力混凝土梁式橋的自動(dòng)配索計(jì)算方法[J];華東公路;1998年02期

5 葉春;程進(jìn);;基于遺傳算法的預(yù)應(yīng)力混凝土連續(xù)梁橋自動(dòng)配束方法[J];結(jié)構(gòu)工程師;2009年06期

6 馬洪友;;懸臂澆注箱梁腹板下彎束設(shè)置研究[J];吉林交通科技;2012年01期

7 趙慧娟;連續(xù)梁預(yù)應(yīng)力鋼束布置ICAD系統(tǒng)中知識(shí)的應(yīng)用[J];西南交通大學(xué)學(xué)報(bào);1999年06期

8 周相略;關(guān)于懸臂梁橋截面高度曲線的選擇[J];中南公路工程;1978年01期

相關(guān)博士學(xué)位論文 前1條

1 唐海紅;基于遺傳算法的連續(xù)梁橋優(yōu)化設(shè)計(jì)方法與應(yīng)用研究[D];哈爾濱工業(yè)大學(xué);2009年

，

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