發(fā)布時間：2019-06-04 10:36

【摘要】：斜拉橋是一種高次超靜定的復雜結(jié)構(gòu),索塔是其主要的承重構(gòu)件,斜拉橋的活載和恒載幾乎全通過索塔傳遞到下部的塔墩和基礎(chǔ),所以斜拉橋索塔是設(shè)計和施工控制的關(guān)鍵�？紤]到索塔容易受風力、斜拉索大噸位拉力等外力作用,尤其是對于異形索塔,其受力更加復雜,并且變形和應(yīng)力分布具有明顯的空間性,所以索塔的施工質(zhì)量對于整個斜拉橋來說起著至關(guān)重要的作用,本文以鄭州新區(qū)龍湖內(nèi)環(huán)路跨北飲水橋(12#橋梁)為背景,對其索塔施工過程中臨時水平橫撐進行詳盡的計算分析。首先,本文對斜拉橋索塔在施工過程中,影響索塔實際線形及內(nèi)力分布的可能因素進行分析,緊扣索塔施工控制的主要內(nèi)容,分析各因素對索塔施工控制的影響,確定影響異形索塔的主要因素。其次,根據(jù)本工程異形索塔的結(jié)構(gòu)特點,在索塔下部和中部4個斜柱的施工過程中,加入3道水平臨時橫撐,對索塔的線形及內(nèi)力進行控制。應(yīng)用橋梁計算軟件MIDAS/CIVIL建立鄭州新區(qū)龍湖內(nèi)環(huán)路跨北飲水橋索塔施工過程模型,對每個施工階段中斜柱的偏移量及應(yīng)力值進行計算分析,研究水平臨時橫撐的作用效果。最后,對鄭東新區(qū)龍湖內(nèi)環(huán)路跨北飲水橋索塔施工控制中所需的一些主要數(shù)據(jù)進行分析,提出了用于索塔施工控制中水平臨時橫撐的主要參數(shù),整個模型計算分析為斜拉橋索塔的設(shè)計與施工提供參考依據(jù)。
[Abstract]:Cable-stayed bridge is a kind of high-order statically determined complex structure, and cable tower is its main load-bearing component. The live load and dead load of cable-stayed bridge are almost all transferred to the lower tower pier and foundation through the cable tower, so the cable-tower of cable-stayed bridge is the key to design and construction control. Considering that the cable tower is easily subjected to external forces such as wind force and large tonnage tension of cable-stayed cables, especially for special-shaped cable towers, the force is more complex, and the deformation and stress distribution are obviously spatial. Therefore, the construction quality of the cable tower plays an important role in the whole cable-stayed bridge. This paper is based on the north drinking bridge (12# bridge) in the inner loop of Longhu in Zhengzhou New area. The temporary horizontal transverse brace in the construction process of the cable tower is calculated and analyzed in detail. First of all, this paper analyzes the possible factors that affect the actual alignment and internal force distribution of cable tower in the construction process of cable-stayed bridge, and analyzes the influence of each factor on the construction control of cable tower. Determine the main factors affecting the profiled cable tower. Secondly, according to the structural characteristics of the special-shaped cable tower, three horizontal temporary transverse braces are added to control the alignment and internal force of the cable tower in the construction process of the four inclined columns in the lower and middle parts of the cable tower. The bridge calculation software MIDAS/CIVIL is used to establish the construction process model of the cable tower of the north drinking water bridge in the inner loop of Longhu in Zhengzhou New area. The offset and stress value of the inclined column in each construction stage are calculated and analyzed, and the effect of horizontal temporary transverse brace is studied. Finally, some main data needed in the construction control of the north drinking water bridge cable tower in the Longhu inner loop of Zheng Dong New area are analyzed, and the main parameters used for the horizontal temporary transverse brace in the construction control of the cable tower are put forward. The calculation and analysis of the whole model provides a reference for the design and construction of cable tower of cable-stayed bridge.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U445.4;U448.27

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