高架轨道交通引起环境振动的实测与数值模拟

In Situ Experimental and Numerical Predictions of Environmental Vibration by Urban Viaduct Rail Transit

从现场实测和数值模拟 2个方面分析研究上海高架轨道交通明珠线引起的环境振动实况、发生机理及振动传播规律 .根据实测资料提出了预测明珠线引起环境振动振级的统计回归公式 .建立了车 -桥子结构和框架 -地基基础子结构 2个体系的分析模型及计算方法 .计算了典型区段在列车通过时引起的沿线环境振动 .数值模拟分析结果表明 ,用提出的分析模型和计算方法算得的环境振动振级与统计回归公式符合较好 .

In this paper the realities,the mechanism and the propagation of the environmental vibration induced by the Mingzhu Line in Shanghai are studied by both in situ experimental and numerical simulation methods.Based on the observed dataset a statistic regression formula is suggested to predict the environmental vibration induced by Mingzhu Line.The ground vibration along the line has been numerically analyzed utilizing the train-bridge system and the frame-foundation-soil system.The comparison between the numerical and the observational results shows satisfactory agreement.