本文選題：曲線梁橋　切入點：車橋耦合振動　出處：《湖南大學(xué)》2014年碩士論文

【摘要】：近年來隨著我國交通基礎(chǔ)設(shè)施的快速發(fā)展，曲線連續(xù)梁橋被大量使用于高速公路跨線互通、大跨橋梁引橋和城市立交中，其中絕大部分曲線梁橋為預(yù)應(yīng)力混凝土曲線梁橋。曲線梁橋靜力計算理論經(jīng)過近幾十年的發(fā)展已基本完善，但曲線連續(xù)梁橋動力效應(yīng)的研究相對較弱。我國曲線梁橋汽車載沖擊系數(shù)的確定尚缺乏相關(guān)的規(guī)范條文，工程設(shè)計實踐中只能參考直線梁橋的沖擊系數(shù)確定方法。因此，，開展曲線梁橋車橋耦合振動研究對于曲線梁橋的設(shè)計具有重要的意義。本文采用數(shù)值模擬方法對曲線梁橋車橋耦合振動理論進行研究，進而采用MATLAB編寫了曲線梁橋車橋耦合振動程序，并針對一公路曲線梁橋進行了車橋耦合振動計算，最后對一座實際曲線梁橋進行了車橋耦合振動現(xiàn)場實測研究，并與本文開發(fā)的曲線梁橋車橋耦合振動程序計算結(jié)果進行比較，驗證了本文開發(fā)程序的可靠性。論文的主要研究內(nèi)容如下： (1)在簡要綜述國內(nèi)外車—橋耦合振動研究現(xiàn)狀的基礎(chǔ)上，重點對曲線梁橋車橋耦合振動研究現(xiàn)狀進行了綜述，并給出了本文主要研究內(nèi)容和研究技術(shù)路線。 (2)論述了曲線梁橋結(jié)構(gòu)動力有限元分析基本理論，采用空間梁單元并推導(dǎo)了其單元質(zhì)量矩陣、剛度矩陣、阻尼矩陣、荷載列陣及單元運動方程，組集整體剛度矩陣。采用Newmark-β求解結(jié)構(gòu)動力響應(yīng)，基于MATLAB平臺開發(fā)了曲線梁橋結(jié)構(gòu)動力響應(yīng)分析程序。 (3)基于剛體動力學(xué)和車輛動力學(xué)假設(shè)，將車輛離散為彈簧單元和質(zhì)量單元，推導(dǎo)了三維整體車輛模型的運動方程。采用傅立葉逆變換方法模擬路面不平度，并編寫了相應(yīng)的路面不平整度模擬程序，并模擬了國家標(biāo)準(zhǔn)(GB/T7031-86)規(guī)定的A、B、C三種路面粗糙度對應(yīng)的路面不平整時程信號，為后續(xù)的曲線梁橋車橋耦合振動研究奠定了基礎(chǔ)。 (4)根據(jù)車橋耦合振動的基本理論，采用Newmark-β求解結(jié)構(gòu)動力響應(yīng)，基于MATLAB開發(fā)了曲線梁橋車橋耦合振動分析程序，并與ANSYS軟件計算結(jié)果進行了比較，最后對一座實際曲線梁橋進行了車橋耦合振動現(xiàn)場實測研究，并與本文開發(fā)的曲線梁橋車橋耦合振動程序計算結(jié)果進行比較，驗證了本文開發(fā)程序的可靠性。 (5)分別考慮路面不平整度、曲率半徑、車輛行駛偏心、橋梁結(jié)構(gòu)阻尼比、橋梁跨數(shù)、主梁的支撐形式等參數(shù)，對公路曲線梁橋車橋耦合振動影響。
[Abstract]:In recent years, with the rapid development of transportation infrastructure in China, curved continuous beam bridges are widely used in highway cross-line intercommunication, long-span bridge approach bridge and urban interchange. Most of the curved girder bridges are prestressed concrete curved girder bridges. The static calculation theory of curved girder bridges has been basically improved after decades of development. However, the study of dynamic effect of curved continuous beam bridge is relatively weak. The determination of impact coefficient of automobile load of curved girder bridge in our country is still lack of relevant regulations. In engineering design, the method of determining impact coefficient of straight beam bridge can only be referred to. The study of vehicle-bridge coupling vibration of curved girder bridge is of great significance for the design of curved beam bridge. In this paper, the theory of vehicle-bridge coupling vibration of curved girder bridge is studied by numerical simulation. Furthermore, the program of vehicle-bridge coupling vibration of curved girder bridge is compiled by using MATLAB, and the vehicle-bridge coupling vibration is calculated for a highway curved girder bridge. Finally, the field measurement of vehicle-bridge coupling vibration of an actual curved beam bridge is carried out. The reliability of the program is verified by comparing with the calculation results of the curve beam bridge vehicle-bridge coupling vibration program developed in this paper. The main contents of this paper are as follows:. 1) on the basis of a brief review of the research status of vehicle-bridge coupling vibration at home and abroad, the research status of vehicle-bridge coupling vibration of curved girder bridge is summarized, and the main research content and technical route of this paper are given. In this paper, the basic theory of dynamic finite element analysis of curved beam bridges is discussed. The element mass matrix, stiffness matrix, damping matrix, load array and element motion equation are derived by using space beam element. The dynamic response of curved girder bridge is solved by Newmark- 尾, and the dynamic response of curved beam bridge is developed based on MATLAB platform. Based on the assumptions of rigid body dynamics and vehicle dynamics, the vehicle is discretized into spring element and mass element, and the motion equation of 3D vehicle model is derived. The inverse Fourier transform method is used to simulate the road roughness. The simulation program of road roughness is compiled, and the time history signal of road roughness corresponding to three kinds of road roughness specified in GB / T7031-86) is simulated, which lays a foundation for the further study of vehicle-bridge coupling vibration of curved girder bridge. 4) according to the basic theory of vehicle-bridge coupling vibration, Newmark- 尾 is used to solve the structural dynamic response. Based on MATLAB, the analysis program of vehicle-bridge coupling vibration of curved girder bridge is developed, and the calculation results are compared with those of ANSYS software. Finally, a real curved girder bridge is studied in the field of vehicle-bridge coupling vibration, and the results are compared with the calculation results developed in this paper, which verify the reliability of the program developed in this paper. The influence of road roughness, radius of curvature, vehicle eccentricity, damping ratio of bridge structure, number of bridge span and support form of main beam on vehicle-bridge coupling vibration is considered respectively.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441.3

【參考文獻】

相關(guān)期刊論文 前10條

1 劉獻棟,鄧志黨,高峰;公路路面不平度的數(shù)值模擬方法研究[J];北京航空航天大學(xué)學(xué)報;2003年09期

2 劉華;葉見曙;;公路混凝土彎箱梁橋的動反應(yīng)[J];東南大學(xué)學(xué)報(自然科學(xué)版);2006年02期

3 桂水榮;陳水生;許士強;;移動荷載下簡支梁橋3種車橋耦合模型研究[J];華東交通大學(xué)學(xué)報;2007年01期

4 趙躍宇;康厚軍;馮銳;勞文全;;曲線梁研究進展[J];力學(xué)進展;2006年02期

5 單德山,李喬;曲率半徑對曲線連續(xù)梁橋車橋耦合振動的影響[J];橋梁建設(shè);2004年06期

6 譚國輝;橋梁與車輛相互作用的系統(tǒng)模擬[J];土木工程學(xué)報;1996年03期

7 殷翔,董正筑,王繼燕;小波-傅立葉變換綜合法的車橋耦合振動分析[J];太原理工大學(xué)學(xué)報;2005年06期

8 肖新標(biāo),沈火明;3種車橋耦合振動分析模型的比較研究[J];西南交通大學(xué)學(xué)報;2004年02期

9 李軍強,劉宏昭,何欽象,方同;車-橋系統(tǒng)耦合振動響應(yīng)的簡便計算[J];應(yīng)用力學(xué)學(xué)報;2004年02期

10 陳炎,黃小清,馬友發(fā);車橋系統(tǒng)的耦合振動[J];應(yīng)用數(shù)學(xué)和力學(xué);2004年04期

相關(guān)博士學(xué)位論文 前1條

1 黃新藝;混凝土連續(xù)曲線梁橋在車輛荷載作用下的動力響應(yīng)研究[D];哈爾濱工業(yè)大學(xué);2008年

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