考虑桥面随机不平度的钢管混凝土拱桥冲击系数统计分析
发布时间：2019-02-25 20:30
【摘要】：以某大型钢管混凝土拱桥为对象,采用经动力试验验证的自编车桥耦合振动分析程序,进行了多组随机不平度样本下的车桥动力响应分析。根据分析结果,对不同桥面状况和车速条件下桥梁的动力冲击效应进行了统计分析。分析结果表明:车速、不平度等级确定时冲击系数服从正态分布。桥面状况等级对动力冲击效应的均值和均方差影响明显,不同保证率下车辆冲击系数差异较大。根据桥梁重要性等级,按照统计分析方法确定冲击系数,将有效提高车辆冲击系数取值的合理性和科学性。
[Abstract]:Taking a large concrete-filled steel tube arch bridge as an object, the dynamic response of a large-scale concrete-filled steel tube arch bridge is analyzed by means of a self-compiled program for coupled vibration analysis of vehicles and bridges verified by dynamic tests under a number of random unevenness samples. According to the analysis results, the dynamic impact effects of bridges under different deck conditions and vehicle speeds are statistically analyzed. The results show that the impact coefficient obeys the normal distribution when the speed and degree of irregularity are determined. The mean value and mean square deviation of dynamic impact effect are affected obviously by the condition grade of bridge deck, and the impact coefficient of vehicle varies greatly under different guarantee rates. According to the importance grade of the bridge and the statistical analysis method to determine the impact coefficient, the rationality and scientificity of the value of the vehicle impact coefficient will be improved effectively.
【作者单位】： 东北林业大学土木工程学院;交通运输部公路科学研究院;哈尔滨工业大学交通科学与工程学院;
【分类号】：U448.22
[Abstract]:Taking a large concrete-filled steel tube arch bridge as an object, the dynamic response of a large-scale concrete-filled steel tube arch bridge is analyzed by means of a self-compiled program for coupled vibration analysis of vehicles and bridges verified by dynamic tests under a number of random unevenness samples. According to the analysis results, the dynamic impact effects of bridges under different deck conditions and vehicle speeds are statistically analyzed. The results show that the impact coefficient obeys the normal distribution when the speed and degree of irregularity are determined. The mean value and mean square deviation of dynamic impact effect are affected obviously by the condition grade of bridge deck, and the impact coefficient of vehicle varies greatly under different guarantee rates. According to the importance grade of the bridge and the statistical analysis method to determine the impact coefficient, the rationality and scientificity of the value of the vehicle impact coefficient will be improved effectively.
【作者单位】： 东北林业大学土木工程学院;交通运输部公路科学研究院;哈尔滨工业大学交通科学与工程学院;
【分类号】：U448.22
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