本文選題：不對稱連續(xù)剛構(gòu)橋　切入點：跨徑不對稱　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國交通事業(yè)的不斷發(fā)展,公路里程也在不斷刷新,橋梁作為公路工程中不可缺少的一部分,也得到不斷的發(fā)展。在我國西南地區(qū),由于地理環(huán)境以峽谷山區(qū)居多,橋梁更是越來越多的建設(shè),也正是由于其地理環(huán)境的限制,建造對稱連續(xù)剛構(gòu)橋,可能需要破壞當?shù)丨h(huán)境或者需要大量的開挖深山,因此不對稱的連續(xù)剛構(gòu)橋漸漸應(yīng)用到實際工程中。本文以一對稱的連續(xù)剛構(gòu)橋為背景,建立長度不同的用懸臂施工現(xiàn)澆形成的兩T構(gòu),得到不同的不對稱連續(xù)剛構(gòu)橋的模型。通過有限元軟件MIDAS/Civil進行成橋后的模擬和分析,得到了關(guān)于不對稱三跨連續(xù)剛構(gòu)橋以下有益結(jié)論：①懸臂施工形成的兩T構(gòu)在長度不一樣的情況下,認為其長度的比值范圍在0.39η≤1是比較合理。②兩T構(gòu)采用不同的梁高曲線和底板厚度曲線時,在大T構(gòu)采用2.0次拋物線時,小T構(gòu)采用1.5次拋物線變化,其受力與都采用2.0次拋物線變化時,相差不大,最主要的在于梁端支座反力的改善。③在對不對稱連續(xù)剛構(gòu)橋的主墩分析時,主要研究了其不對稱連續(xù)剛構(gòu)橋的主梁與高、低墩之間的搭配問題,分析發(fā)現(xiàn)大T構(gòu)段產(chǎn)生的縱向位移要大,因此大T構(gòu)段墩的高度應(yīng)比小T構(gòu)段墩的高度要高。④采對不同墩截面形式、雙墩之間間距時,發(fā)現(xiàn)薄壁雙肢墩可以有效降低墩頂彎矩,而且應(yīng)力水平要比單柱墩要小,雙肢間距對結(jié)構(gòu)受力的影響不大。
[Abstract]:With the continuous development of transportation in our country, highway mileage is also being refreshed, and bridges, as an indispensable part of highway engineering, have also been continuously developed. In southwest China, because of the geographical environment, most of them are gorge mountains. More and more bridges are being built. It is precisely because of the limitations of their geographical environment that the construction of symmetrical continuous rigid frame bridges may need to destroy the local environment or require a large number of deep mountains to be excavated. Therefore, asymmetric continuous rigid frame bridges are gradually applied to practical projects. In this paper, a symmetrical continuous rigid frame bridge is used as a background to establish two T structures with different lengths of cantilever cast-in-situ. Different models of asymmetric continuous rigid frame bridge are obtained. The simulation and analysis of the bridge are carried out by the finite element software MIDAS/Civil. It is obtained that the two T structures formed by the cantilever construction of 1: 1 are different in length when the unsymmetrical three-span continuous rigid frame bridge is constructed under the following beneficial conclusion. It is considered that the ratio range of 0.39 畏 鈮，

本文編號：1587707