【摘要】：摘要：大跨度連續(xù)梁橋結(jié)構(gòu)在移動荷載作用下動力效應(yīng)顯著。本文以酉水大橋?yàn)楸尘?對大跨度連續(xù)梁橋的車輛-橋梁耦合時變系統(tǒng)動力響應(yīng)進(jìn)行分析,主要工作如下： 介紹了大跨度連續(xù)梁橋動力分析有限元法,建立橋梁結(jié)構(gòu)動力分析模型,推導(dǎo)形成橋梁結(jié)構(gòu)的特性矩陣(單元剛度矩陣、單元質(zhì)量矩陣和單元阻尼矩陣)。分析了不同自由度車輛模型的優(yōu)劣,建立了車輛移動荷載7自由度模型,推導(dǎo)出車輛空間振動總勢能。闡述了路面不平順分析方法,對所研究橋梁路面不平順做了定量模擬。 根據(jù)彈性系統(tǒng)總勢能不變值原理和“對號入座”法則,建立了車輛-大跨度連續(xù)梁橋耦合系統(tǒng)動力方程。運(yùn)用VBS程序?qū)τ纤髽蜍囕v移動荷載動力響應(yīng)進(jìn)行了分析,對比規(guī)范計(jì)算汽車沖擊系數(shù),并采用狄克曼指標(biāo)對橋梁振動舒適性進(jìn)行評價。 對車輛-橋梁耦合時變系統(tǒng)動力響應(yīng)參數(shù)進(jìn)行了分析。研究了橋面不平順、車輛行駛速度、車輛載重、行車間距、車道數(shù)對酉水大橋動力響應(yīng)和狄克曼指標(biāo)橋梁振動舒適性的影響以及橋面不平順、車輛行駛速度、車輛載重對車輛動力響應(yīng)和ISO標(biāo)準(zhǔn)、Sperling指標(biāo)車輛行車舒適性規(guī)律的影響,得出相關(guān)結(jié)論以供高速公路大跨度連續(xù)梁橋設(shè)計(jì)施工、日常運(yùn)營管理參考。
[Abstract]:Abstract: the dynamic effect of long-span continuous beam bridge structure under moving load is remarkable. In this paper, the dynamic response of vehicle-bridge coupling time-varying system of long-span continuous beam bridge is analyzed based on Youshui Bridge. The main work is as follows: the finite element method for dynamic analysis of long-span continuous beam bridge is introduced, the dynamic analysis model of bridge structure is established, and the characteristic matrix of bridge structure (element stiffness matrix, element mass matrix and element damping matrix) is derived. The advantages and disadvantages of vehicle models with different degrees of freedom are analyzed, the 7-degree-of-freedom model of vehicle moving load is established, and the total potential energy of vehicle spatial vibration is derived. This paper expounds the analysis method of pavement irregularity, and makes a quantitative simulation of the pavement irregularity of the studied bridge. According to the principle of invariance of total potential energy of elastic system and the rule of "seat alignment", the dynamic equation of vehicle-long span continuous beam bridge coupling system is established. The dynamic response of the vehicle moving load of Youshui Bridge is analyzed by VBS program, the impact coefficient of the vehicle is calculated by comparing the code, and the vibration comfort of the bridge is evaluated by Dikman index. The dynamic response parameters of vehicle-bridge coupling time-varying system are analyzed. The effects of bridge deck irregularity, vehicle speed, vehicle load, driving distance and lane number on the dynamic response of Youshui Bridge and the vibration comfort of Deckman index bridge, as well as the effects of bridge deck irregularity, vehicle speed, vehicle load on vehicle dynamic response and ISO standard, Sperling index vehicle driving comfort law are studied, and the relevant conclusions are drawn for the design and construction of long-span continuous beam bridge on expressway. Reference for daily operation and management.
【學(xué)位授予單位】：中南大學(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(xiàn)】

相關(guān)期刊論文 前10條

1 單德山,李喬;車橋耦合振動分析的數(shù)值方法[J];重慶交通學(xué)院學(xué)報(bào);1999年03期

2 徐強(qiáng);吳光華;;簡支梁橋車橋耦合振動影響因素分析[J];低溫建筑技術(shù);2008年03期

3 唐意,陳q，

本文編號：2499094