基于影响线的桥梁移动荷载识别  

Moving load identification of a bridge based on influence line

作　　者：王宁波[1] 任伟新[1] 李苗[1] 

机构地区：[1]中南大学土木工程学院,长沙410075

出　　处：《振动与冲击》2013年第3期129-133,共5页Journal of Vibration and Shock

摘　　要：以桥梁不同截面动应变响应为对象,进行移动荷载识别研究。通过寻找应变曲线峰值点识别车辆行驶速度、轴数、轴距,并采用影响线拟合动应变响应的思路识别车辆各轴轴重。结合车-桥耦合振动模拟计算,对桥梁移动荷载识别问题进行数值仿真分析。The identification of moving loads was studied with dynamic strain responses of different cross sections of a simply supported girder bridge. Peak value points of the strain curve were used to identify vehicle speed, number of axes and axle spacing, then influence lines were employed to fit dynamic strain in order to identify axle load. Through vehiclebridge coupled vibration numerical simulation, the dynamic strain response of the bridge was calculated, and used to identify the moving loads.

关 键 词：应变 移动荷载识别 影响线 车-桥耦合振动 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]