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高墩弯桥结构形式在高山深谷地区极具优势。为研究桥梁结构参数变化以及地震动输入方向对高墩弯桥地震响应特性的影响,以贵州省坞家塆大桥为研究对象,采用有限元软件Midas/Civil建立多个参数模型,研究了横桥向与顺桥向地震输入作用下曲率半径值、高低墩差值变化对高墩弯桥地震响应特性的影响,分析了地震动输入方向以30°间隔由顺桥向地震输入变化到横桥向地震输入时对桥梁地震响应特性的影响;得出了控制截面位移与弯矩等参数改变的变化规律,总结了各参数变化对地震响应特性的影响程度。
High pier curve bridge structure in the mountain valley area has great advantages. In order to study the change of bridge structural parameters and the influence of input direction of ground motions on the seismic response of high pier curved bridges, taking Wujiaochang Bridge in Guizhou Province as the research object, a number of parametric models were established using finite element software Midas / Civil. The effect of the radius of curvature radius and the difference between the height and the height of the piers on the seismic response of curved bridge with high piers under the input of earthquake to Yushun Bridge is analyzed. The influence of earthquake input on the seismic response of the bridge was analyzed. The variation of parameters such as displacement and moment of the control section was obtained. The influence of the parameters on the seismic response was summarized.