發(fā)布時(shí)間：2018-07-08 10:31

  本文選題：提籃拱橋 + 施工監(jiān)控　； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：鋼管混凝土提籃拱橋由于造型美觀、自重輕、剛度大和跨越能力強(qiáng)等優(yōu)點(diǎn),成為眾多橋梁中具備競(jìng)爭(zhēng)力的橋型之一。隨著提籃拱橋的跨徑不斷增大,施工工藝變得更加復(fù)雜,施工難度也會(huì)相應(yīng)地增加,施工監(jiān)控技術(shù)的重要性逐漸凸現(xiàn)出來。本文以新建京沈客專某鋼管混凝土提籃拱橋?yàn)楣こ瘫尘?對(duì)大橋施工過程進(jìn)行了監(jiān)測(cè)與控制,研究了成橋階段吊桿內(nèi)力識(shí)別、調(diào)整、優(yōu)化,對(duì)施工階段拱肋臨時(shí)支架拆除工序進(jìn)行了優(yōu)化分析。主要研究工作如下:(1)對(duì)鋼管混凝土提籃拱橋的優(yōu)點(diǎn)和特點(diǎn)進(jìn)行了簡(jiǎn)單地概述,并且列舉一些近年來國內(nèi)所建造的鋼管混凝土提籃拱橋;闡述了在復(fù)雜橋梁施工監(jiān)測(cè)與控制的重要性。(2)介紹了橋梁施工監(jiān)測(cè)控制的方法;根據(jù)現(xiàn)場(chǎng)實(shí)際情況和大橋特點(diǎn)制定大橋的施工監(jiān)控內(nèi)容;采用了正裝分析法且借助有限元軟件Midas Civil對(duì)新建京沈客專某鋼管混凝土提籃拱橋的各施工階段進(jìn)行仿真分析;通過對(duì)實(shí)測(cè)監(jiān)控?cái)?shù)據(jù)與理論數(shù)據(jù)的對(duì)比分析,研究了橋梁主梁和拱肋結(jié)構(gòu)在各個(gè)施工階段的受力特點(diǎn)。(3)采用頻率法和千斤頂測(cè)定法相結(jié)合的測(cè)試方法對(duì)成橋階段及調(diào)索后的吊桿內(nèi)力進(jìn)行了識(shí)別;對(duì)比分析了影響矩陣法、正裝分析法和倒裝分析法對(duì)于索力調(diào)整的優(yōu)缺點(diǎn),運(yùn)用影響矩陣法對(duì)成橋吊桿內(nèi)力調(diào)整值進(jìn)行了計(jì)算;對(duì)現(xiàn)有吊桿索力優(yōu)化的方法進(jìn)行總結(jié);利用有約束的彎曲能量最小法對(duì)成橋階段吊桿內(nèi)力進(jìn)行了優(yōu)化。(4)研究了拱肋臨時(shí)支架卸落順序?qū)窘Y(jié)構(gòu)應(yīng)力和線形的影響。根據(jù)現(xiàn)場(chǎng)實(shí)際情況提出了幾種拱肋臨時(shí)支架卸落方案,通過有限元軟件Midas Civil對(duì)新建京沈客專某鋼管混凝土提籃拱橋拱肋臨時(shí)支架卸落過程的模擬計(jì)算,提出了一種適合本橋的拆架方案。
[Abstract]:Concrete-filled steel tube (CFST) basket arch bridge has become one of the most competitive bridges because of its beautiful shape, light weight, large stiffness and strong span ability. With the increasing span of basket arch bridge, the construction technology becomes more complex, and the construction difficulty will increase accordingly. The importance of construction monitoring technology is gradually emerging. In this paper, based on the engineering background of a new concrete filled steel tube hoisting arch bridge, the construction process of the bridge is monitored and controlled, and the identification, adjustment and optimization of the internal force of the suspender in the stage of completion are studied. The process of removing arch rib temporary support in construction stage is optimized and analyzed. The main research works are as follows: (1) the advantages and characteristics of concrete-filled steel tubular arch bridge are briefly summarized, and some domestic concrete filled steel tube arch bridges are listed. The importance of monitoring and controlling the construction of complex bridges is expounded. (2) the methods of monitoring and control of bridge construction are introduced, and the construction monitoring contents of the bridge are formulated according to the actual situation of the site and the characteristics of the bridge. In this paper, the formal dress analysis method and the finite element software Midas Civil are used to simulate and analyze the construction stages of a new concrete filled steel tube hoist arch bridge, and the comparison between the measured monitoring data and the theoretical data is carried out. The stress characteristics of the bridge main beam and arch rib structure in each construction stage are studied. (3) the internal force of the suspender in the bridge stage and after the cable adjustment is identified by the method of frequency and Jack measurement, and the influence matrix method is compared and analyzed. For the advantages and disadvantages of cable force adjustment, the influence matrix method is used to calculate the adjustment value of the internal force of the suspension rod, and the existing optimization methods of the cable force of the suspension rod are summarized. The constrained bending energy minimization method is used to optimize the internal force of the suspender in the stage of bridge completion. (4) the influence of the unloading sequence of the arch rib temporary support on the basic structural stress and the alignment is studied. According to the actual situation on the spot, several kinds of temporary support unloading schemes of arch rib are put forward, and the simulation calculation of the unloading process of temporary support of arch rib of a new concrete filled steel tube hoist arch bridge is carried out by the finite element software Midas Civil. A scheme for removing the bridge is presented.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.4;U448.22

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 單德山;董俊;劉昕s，

本文編號(hào)：2107143