江心洲大桥运营监测技术流程与研究

为掌握运营阶段桥梁工作状况,对江心洲自锚式悬索桥运营监测过程中全桥各部件的测试技术及流程进行了系统说明,并对吊索力、主缆内力、全桥动力特性、主缆主梁线形及索塔偏位等的测量结果进行分析.结果表明:各项测试值均与设计值较为吻合,桥梁结构处于正常工作状态;吊索面内振动受桥面车辆荷载影响较大,根据拉索面外振动可以更好地确定拉索基频,从而准确测出拉索内力;无线传感器应用于运营阶段全桥动力特性测试具有方便快捷、准确性高等优点.

Technical Process and Research on Operation Monitoring of Jiangxinzhou Bridge

In order to acquire a comprehensive knowledge of the working conditions of the bridge in service,the test technology and process of all parts of the bridge in the course of operation monitoring of Jiangxinzhou self-anchored suspension bridge are systematically illustrated.Besides,the test results of hanger force,main-cable force,dynamic characteristics,main-cable and main girder configuration,and tower deviation are analyzed in detail.The results indicate that all the tested values are consistent with design values and the bridge structure is in good condition;the in-plane vibration of the hanger is strongly influenced by vehicle load of the bridge deck;natural frequency of the hanger can be acquired through out-plane vibration so as to accurately measure the internal force of the hunger;wireless sensor used for testing dynamic characteristics of the whole bridge in service is convenient and fast,and highly accurate.