本文關(guān)鍵詞：下承式鋼管拱橋落梁法成橋施工控制　出處：《廣西大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鋼管拱橋 落梁法 施工控制 最優(yōu)化控制

【摘要】：下承式鋼管拱橋是一種比較常見的橋型,其體系轉(zhuǎn)換施工通常采用吊索張拉法進(jìn)行,吊索張拉法有比較成熟的理論和工程實(shí)踐經(jīng)驗(yàn),但有調(diào)索過程復(fù)雜、施工周期長的缺點(diǎn)。落梁法體系轉(zhuǎn)換施工能夠避免這些缺點(diǎn)：通過吊裝鋼箱梁的臨時(shí)支墩頂升鋼箱梁,然后無應(yīng)力安裝吊桿,最后卸落鋼箱梁完成體系轉(zhuǎn)換的目的。落梁法施工無需反復(fù)調(diào)索,可以大大縮短施工周期。本文研究的是落梁成橋施工的控制方法,主要包括以下幾個(gè)方面： 1.本文采用有限元建模分析、最優(yōu)化控制方法在落梁施工前對其進(jìn)行優(yōu)化控制,采用開環(huán)控制法、最大寬容度法對落梁施工過程進(jìn)行控制,旨在能夠得出一套能夠通用于落梁法成橋施工的控制方案。 2.對于落梁法的最優(yōu)化控制,本文列出了三種目標(biāo)函數(shù)模型：最小二乘法、最小能量法以及梁-拱-索三控法。分別用三種方法對同一個(gè)落梁法施工算例進(jìn)行優(yōu)化分析,對比三種方法的優(yōu)劣,結(jié)果表明：梁-拱-索三控法對落梁法施工過程的控制效果最好。 3.以越南龍橋?yàn)槔?對其落梁施工過程進(jìn)行優(yōu)化控制分析,指導(dǎo)工程施工,結(jié)果表明,對龍橋落梁法成橋施工的控制達(dá)到了設(shè)計(jì)和規(guī)范要求,說明了控制方法的合理性與可行性。
[Abstract]:Through steel tube arch bridge is a relatively common type, the system conversion construction usually adopts the sling tension method, cable tension method has more mature theory and practice experience, but the cable adjustment process complex, long construction period faults. Beam falling law system conversion construction to avoid these disadvantages: the temporary support pier lifting steel box girder lifting steel box girder, and stress free installation of hangers, finally landed complete system conversion. Steel box girder falling construction method without repeatedly adjusting cable, can greatly shorten the construction period. This paper is a study of the beam falling into control method of bridge construction, mainly including the following aspects:
1. this paper uses the finite element modeling, optimization control method in beam falling before the construction of its optimization control, the open-loop control method, maximum tolerance method to control the girder falling construction process, in order to obtain a set of control in general can drop the beam into a bridge construction case.
2. for optimal control fall beam method, this paper lists three kinds of objective function model: least squares method, minimum energy method and beam - arch - cable three control method. Three methods were used on the same beam falling construction method example optimization analysis, comparative advantages and disadvantages of three methods, the results showed that: Beam-Arc - best three cable control method for the control effect of the construction process of beam method.
3. to Vietnam Longqiao as an example, the girder falling construction process control and optimization analysis, guide the engineering construction, the results show that the design meets the requirements and specifications for control of long beam falling into a bridge construction, illustrates the rationality and feasibility of the control method.

【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.22;U445.4

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本文編號：1399765