本文關(guān)鍵詞：拉索斷裂對(duì)PC斜拉橋極限承載力的影響　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 斜拉索 極限承載力 數(shù)值模型 材料非線性 荷載工況

【摘要】：隨著斜拉橋在橋梁領(lǐng)域的迅速發(fā)展，其安全性和耐久性得到了廣泛的重視。本文以某省斜拉橋?yàn)橐劳校⒘擞邢拊Ｐ�，針�?duì)斜拉橋的拉索斷裂損傷，對(duì)其極限狀態(tài)下的安全儲(chǔ)備能力進(jìn)行了計(jì)算分析，具體內(nèi)容如下： (1)本文分析了引起斜拉索損傷的主要原因，，主要介紹了化學(xué)行為和物理行為對(duì)拉索損失的影響，其中重點(diǎn)給出了風(fēng)雨振動(dòng)對(duì)于斜拉索的拉索損傷產(chǎn)生的影響。 (2)本文在查閱參考相關(guān)文獻(xiàn)的基礎(chǔ)上，通過(guò)對(duì)穩(wěn)定問(wèn)題的計(jì)算理論和極限承載力的計(jì)算方法的研究，采用有限元分析軟件建立了數(shù)值模型，對(duì)空間有限元模型在不同荷載工況下的穩(wěn)定問(wèn)題進(jìn)行了分析計(jì)算，并求得相應(yīng)荷載工況下的穩(wěn)定安全系數(shù)，計(jì)算了橋梁的極限承載能力。同時(shí)，通過(guò)模擬斜拉索的不同斷裂位置，對(duì)斜拉橋的極限承載能力進(jìn)行了計(jì)算分析，求得了相應(yīng)的穩(wěn)定安全系數(shù)。 (3)在不同拉索斷裂情況下，通過(guò)分析橋梁極限狀態(tài)時(shí)各單元應(yīng)變?cè)茍D、荷載-位移時(shí)程曲線等，得到了拉索斷裂損傷對(duì)結(jié)構(gòu)性能的影響規(guī)律，進(jìn)而為為該類橋梁在使用過(guò)程中的健康檢測(cè)和維護(hù)維修提供一定參考。
[Abstract]:With the rapid development of cable-stayed bridges, the safety and durability of cable-stayed bridges have been paid more and more attention. Based on a provincial cable-stayed bridge, a finite element model is established to deal with the cable fracture damage of cable-stayed bridges. The safety reserve capacity under the limit state is calculated and analyzed. The specific contents are as follows: In this paper, the main causes of cable damage are analyzed, and the effects of chemical and physical behaviors on cable losses are introduced. The effect of wind and rain vibration on cable damage is emphasized. 2) based on the reference literature, the numerical model is established by using the finite element analysis software through the study of the calculation theory of stability problem and the calculation method of ultimate bearing capacity. The stability problem of the spatial finite element model under different load conditions is analyzed and calculated, and the stability safety factor under the corresponding load condition is obtained, and the ultimate bearing capacity of the bridge is calculated. The ultimate bearing capacity of the cable-stayed bridge is calculated and analyzed by simulating the different fracture positions of the stayed cables, and the corresponding stability safety factor is obtained. 3) in the case of different cable fracture, by analyzing the strain cloud diagram and load-displacement time history curve of each element in the limit state of the bridge, the influence law of the cable fracture damage on the structure performance is obtained. It provides a reference for the health inspection and maintenance of this kind of bridge.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.27

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 陳政清;顏全勝;;大跨度斜拉橋的非線性分析[J];長(zhǎng)沙鐵道學(xué)院學(xué)報(bào);1991年03期

2 王金峰;劉斌;;斜拉索的振動(dòng)與抑振措施探討[J];中國(guó)港灣建設(shè);2006年01期

3 鄭莉嬋;;湛江海灣大橋斜拉索抗風(fēng)雨振措施[J];中外公路;2006年05期

4 劉菊玖,楊繼前,汪正興;斜拉橋技術(shù)的最新演變[J];國(guó)外橋梁;2000年01期

5 蘇達(dá)根,韓大建,譚哲東,廖景娛,唐紅雁,陳志雄;斜拉橋拉索鋼絲腐蝕失效研究[J];華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版);1996年08期

6 王德民,楊佳新,李暉,王良辰;斜拉橋的現(xiàn)狀與發(fā)展[J];黑龍江水利科技;2000年02期

7 何文德,杜江,熊潔;富密灌區(qū)渠首斜拉橋換索工程技術(shù)述評(píng)[J];黑龍江水利科技;2002年01期

本文編號(hào)：1417323