【摘要】：本文研究涉及的連續(xù)體系橋梁包括連續(xù)剛構(gòu)、連續(xù)梁、連續(xù)梁—剛構(gòu)組合體系三種橋梁結(jié)構(gòu)，因其結(jié)構(gòu)相似，所以在此統(tǒng)稱為連續(xù)體系橋梁。大跨徑連續(xù)體系橋梁因其跨越能力較大、抗震性能較好、設(shè)計施工均較為成熟、具有良好的經(jīng)濟(jì)性等優(yōu)點(diǎn)，在我國有著廣泛應(yīng)用，往往是首選方案，，特別是在西部溝壑地區(qū)。但由于實(shí)際需要，這種連續(xù)體系橋梁跨徑越來越大，結(jié)構(gòu)越來越纖細(xì)化，橋梁結(jié)構(gòu)基頻越來越低，使得橋梁共振問題越來越突出，其對高墩大跨徑連續(xù)體系橋梁本身安全性的影響越來越大。公路高墩大跨徑連續(xù)體系橋梁共振問題引起了學(xué)術(shù)界和工程界的關(guān)注，對公路高墩大跨徑連續(xù)體系橋梁共振及其影響分析研究具有非常重要的理論價值和工程價值。 本文依托陜西省3座高墩大跨徑連續(xù)體系橋梁工程，以陜西省3座高墩大跨徑連續(xù)體系橋梁為原型進(jìn)行有限元建模分析，進(jìn)行了以下工作。 （1）給出了高墩大跨徑橋梁發(fā)生車橋耦合共振的判定方法。 （2）利用二次開發(fā)的車橋耦合計算模塊，借助于ANSYS詳細(xì)研究了多車輛勻速車列不同激擾頻率、不同車速等不同工況下橋墩和主梁控制截面動位移、動撓度、動加速度、動彎矩等參數(shù)的車橋耦合振動響應(yīng)規(guī)律。 （3）對比共振動力響應(yīng)值與《公路橋梁通用規(guī)范》規(guī)定的靜荷載（1+μ）靜力響應(yīng)值。 （4）給出了加裝液體粘滯阻尼器（FVD）對高墩大跨徑連續(xù)體系橋梁車橋耦合共振響應(yīng)的影響，提出了加裝液體粘滯阻尼器（FVD）減小高墩大跨徑連續(xù)體系橋梁共振響應(yīng)的新方法。
[Abstract]:The continuous system bridges in this paper include continuous rigid frame and continuous beam-rigid frame composite systems. Because of their similar structures, they are called continuous system bridges in this paper. Long span continuous system bridges are widely used in China, especially in the western gully area, because of their large span capacity, good seismic performance, mature design and construction, good economy and so on. However, due to the actual needs, the bridge span of this continuous system is becoming larger and larger, the structure is becoming more and more slender, and the fundamental frequency of the bridge structure is getting lower and lower, which makes the bridge resonance problem more and more prominent. It has more and more influence on the safety of long span continuous system bridges with high piers. The problem of bridge resonance in highway high-pier long-span continuous system has attracted the attention of academic and engineering circles. It has very important theoretical and engineering value for the analysis and study of bridge resonance and its influence in highway high-pier long-span continuous system. In this paper, based on three bridges with high piers and long span continuous system in Shaanxi Province, the finite element modeling and analysis of three long-span continuous system bridges with high piers as prototype are carried out. The following works have been done. (1) the method of determining the vehicle-bridge coupling resonance of long-span bridges with high piers is given. (2) the vehicle-bridge coupling calculation module is developed. With the aid of ANSYS, the dynamic displacement, deflection and acceleration of bridge piers and main beams under different excitation frequencies and different speeds are studied in detail. Dynamic bending moment and other parameters of vehicle-bridge coupling vibration response law. (3) compare the resonance dynamic response value with the static load (1 渭) response value specified in the General Code for Highway and Bridge. (4) We give the added liquid viscosity. The effect of hysteretic damper (FVD) on the coupled resonance response of vehicle-bridge in long-span continuous system with high piers. A new method for reducing the resonance response of a bridge with a liquid viscous damper (FVD) is proposed in this paper.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441.3;U448.11

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