本文選題：自錨式懸索橋 + 有限元模型��； 參考：《鄭州大學》2015年碩士論文

【摘要】：隨著社會的進步和經(jīng)濟的發(fā)展,人們要求橋梁工程不僅僅作為跨越障礙的構筑物,而且應該具有景觀效應,并能成為地標建筑物,自錨式懸索橋正是兼具這些要求,因而受到很多國家和地區(qū)的工程師青睞。然而,地震的發(fā)生,造成大量的橋梁結構的破壞,使人民生命財產(chǎn)遭受巨大損失。因此,如何保證自錨式懸索橋能夠經(jīng)受地震作用的考驗是一個值得深入研究的問題。本文基于上述背景,以桃花峪黃河大橋為依托,針對大跨度自錨式懸索橋的地震動力響應進行分析研究,所做的主要工作和得到的結論如下:(1)利用橋梁專用分析軟件建立有限元數(shù)值分析模型,確定大橋成橋合理狀態(tài),然后在成橋狀態(tài)的基礎上進行動力特性分析。(2)借鑒已有的自錨式懸索橋自由振動微分方程頻率計算公式求出桃花峪黃河大橋自振頻率的解析解,并與有限元求得的數(shù)值解進行對比,對比得出解析解與數(shù)值解相應振型的自振頻率最大偏差不超過10%,吻合很好。(3)利用反應譜法對該自錨式懸索橋進行地震響應分析,得到了結構在縱向+豎向和橫向+豎向工況下主梁和主塔關鍵位置處的內力和位移響應。(4)利用時程分析法,考慮一致激勵、行波激勵和隨機地震動多點激勵的情況下對大橋進行地震響應分析,將一致激勵的結果分別與反應譜、行波激勵和多點激勵的分析結果進行對比,分析行波效應、部分相干效應等對大跨度自錨式懸索橋地震響應的影響。
[Abstract]:With the progress of society and the development of economy, people require that bridge engineering should not only be used as a structure for crossing obstacles, but also have landscape effect and become a landmark building. Self-anchored suspension bridge has these requirements.As a result, engineers in many countries and regions favor.However, the earthquake caused a great deal of damage to the bridge structure and caused great loss of people's lives and property.Therefore, how to ensure that self-anchored suspension bridge can withstand the test of earthquake action is a problem worthy of further study.Based on the above background, based on the Taohuayu Yellow River Bridge, the seismic dynamic response of the long-span self-anchored suspension bridge is analyzed and studied in this paper.The main work done and the conclusions obtained are as follows: 1) the finite element numerical analysis model is established by using the special analysis software for the bridge to determine the reasonable state of the bridge.Then on the basis of the state of the completed bridge, the dynamic characteristics of the bridge are analyzed. (2) the analytical solution of the natural vibration frequency of the Taohuayu Yellow River Bridge is obtained by using the existing formula of differential equation frequency calculation for the free vibration of the self-anchored suspension bridge.Compared with the numerical solution obtained by the finite element method, it is concluded that the maximum deviation of the natural vibration frequency of the analytical solution and the numerical solution is not more than 10, which is in good agreement with that of the finite element method, and the response spectrum method is used to analyze the seismic response of the self-anchored suspension bridge.The internal force and displacement response of the main beam and the main tower at the key position of the main beam and the main tower under longitudinal and transverse vertical working conditions are obtained. The time-history analysis method is used to consider the uniform excitation.In the case of traveling wave excitation and random ground motion multi-point excitation, the seismic response of the bridge is analyzed. The results of uniform excitation are compared with the results of response spectrum, traveling wave excitation and multi-point excitation, respectively, and the traveling wave effect is analyzed.The effect of partial coherence effect on the seismic response of long span self-anchored suspension bridge.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U442.55;U448.25

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