本文選題：鋼筋混凝土拱橋　切入點(diǎn)：行波效應(yīng)　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著世界各國跨江跨海工程、連島工程的不斷建設(shè)，橋梁工程正朝跨度更大、受力更合理、造價(jià)更節(jié)約的方向發(fā)展。鋼筋混凝土拱橋以其優(yōu)越的跨越能力、簡潔的傳力機(jī)制、經(jīng)濟(jì)的工程造價(jià)、較低的維護(hù)費(fèi)用深受橋梁工程師的青睞。重慶萬州長江大橋以420m的跨徑成為當(dāng)今世界上跨度最大的鋼筋混凝土拱橋，歐洲、日本、克羅地亞等國家先后開展了600~1000m級特大跨度混凝土拱橋可行性研究，并取得了一定的研究成果。 本文以日本土木協(xié)會(huì)于1999年著手試設(shè)計(jì)的一座600m跨的特大跨鋼筋混凝土拱橋?yàn)檠芯繉ο螅ㄟ^以下幾項(xiàng)工作對橋梁的地震響應(yīng)特點(diǎn)和易損性性能進(jìn)行了研究： ①建立結(jié)構(gòu)的彈性分析模型，探究拱橋自身的動(dòng)力特性，并選取8條典型的地震波進(jìn)行不同步輸入，提取結(jié)構(gòu)控制點(diǎn)的響應(yīng)參數(shù)，分析地震頻譜特性和峰值加速度對行波效應(yīng)影響產(chǎn)生的作用，并認(rèn)為行波效應(yīng)對拱橋地震響應(yīng)的影響不可忽略。 ②在彈性分析模型上建立非線性分析模型，運(yùn)用IDA法開展行波效應(yīng)的時(shí)程輸入，提取地震響應(yīng)的有關(guān)參數(shù)，包括控制節(jié)點(diǎn)位移、控制節(jié)點(diǎn)加速度、控制截面內(nèi)力和控制截面變形，獲取各參數(shù)隨地震強(qiáng)度的變化規(guī)律，并初步判斷拱橋的拱腳位置、1/4跨位置和3/4跨位置應(yīng)作為地震作用下特大跨鋼筋混凝土拱橋易損性分析的主要對象。 ③最后，利用能力需求法分析結(jié)構(gòu)抗震性能的原理，將拱橋截面的彎矩-軸力時(shí)程曲線和彎矩-軸力相關(guān)曲線進(jìn)行對比，探尋拱腳截面地震內(nèi)力響應(yīng)隨地震強(qiáng)度增大產(chǎn)生的變化規(guī)律。通過分析拱腳截面的內(nèi)力能力需求比，得到拱腳是該類橋梁的地震作用下的薄弱位置，且后激勵(lì)拱腳較先激勵(lì)拱腳更容易發(fā)生破壞，，其內(nèi)力能力需求比僅為后者的1/3~1/2。
[Abstract]:With the continuous construction of river and sea crossing projects and even island projects in various countries in the world, bridge engineering is developing towards the direction of larger span, more reasonable force and more economical cost. Reinforced concrete arch bridge is developing with its superior leapfrogging ability and simple force transfer mechanism. Economic engineering cost and low maintenance cost are favored by bridge engineers. Chongqing Wanzhou Yangtze River Bridge with a span of 420 meters has become the world's largest span reinforced concrete arch bridge, Europe, Japan, Croatia and other countries have carried out the feasibility study of 600-1000m large span concrete arch bridge, and obtained certain research results. In this paper, a 600m span reinforced concrete arch bridge with a span of 600m was designed in 1999. The characteristics of seismic response and vulnerability of the bridge were studied through the following work:. The main contents are as follows: 1. The elastic analysis model of the structure is established, and the dynamic characteristics of the arch bridge itself are explored. Eight typical seismic waves are selected for asynchronous input, and the response parameters of the control points of the structure are extracted. The effect of seismic spectrum and peak acceleration on the traveling wave effect is analyzed, and it is considered that the influence of traveling wave effect on the seismic response of arch bridge can not be ignored. (2) the nonlinear analysis model is established on the elastic analysis model. The IDA method is used to carry out the time-history input of the traveling wave effect, and the relevant parameters of the seismic response are extracted, including the control of the node displacement and the control of the node acceleration. The internal force of the section and the deformation of the section are controlled, and the variation of the parameters with the earthquake intensity is obtained. The arch foot position and 3/4 span position of arch bridge should be regarded as the main objects of vulnerability analysis of large span reinforced concrete arch bridge under earthquake. Finally, the moment axial force time-history curve and the moment axial force correlation curve of the arch bridge section are compared by using the principle of capacity demand method to analyze the seismic performance of the structure. By analyzing the internal force demand ratio of arch foot section, it is found that arch foot is the weak position of this kind of bridge under earthquake action. The post-excitation arch is more likely to destroy than the first, and its internal force demand ratio is only 1 / 3 / 1 / 2 of the latter.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.22;U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 程翔云;克爾克橋概況補(bǔ)遺[J];重慶交通學(xué)院學(xué)報(bào);1991年01期

2 許金華,王向堅(jiān);大跨度拱橋在地震行波作用下的響應(yīng)[J];重慶交通學(xué)院學(xué)報(bào);1998年02期

3 黃瑋瓊，李文香，曹學(xué)鋒;中國大陸地震資料完整性研究之二──分區(qū)地震資料基本完整的起始年分布圖象[J];地震學(xué)報(bào);1994年04期

4 卓衛(wèi)東,范立礎(chǔ);從震害教訓(xùn)中反思我國橋梁抗震設(shè)計(jì)現(xiàn)狀[J];福州大學(xué)學(xué)報(bào)(自然科學(xué)版);1999年03期

5 李攀;;幾何非線性對大跨拱橋地震反應(yīng)影響分析[J];城市道橋與防洪;2012年07期

6 岳小吉;;振型分解反應(yīng)譜法在抗震設(shè)計(jì)中的應(yīng)用[J];發(fā)展;2011年07期

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