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农大东路跨线桥上部采用预应力混凝土简支梁结构,盖梁采用独柱悬挑预应力结构。独柱盖梁结构形式特殊,稳定性弱于双柱式盖梁。静载试验已经证明该桥安全性能满足要求,为了得到该桥在移动车辆荷载作用下的动力响应,对其进行成桥动载试验。动载试验得到的动态应变增量和自振特性参数能反映该桥的使用特性,并为桥梁通车运营阶段的监测、养护和管理建立结构初始档案。
Nongda Road East Bridge over the use of prestressed concrete simply supported beam structure, covered with single-column cantilevered prestressed structure. Single-column cap beam structure in the form of special, stability is weaker than double-column cap beam. Static load test has proved that the safety performance of the bridge to meet the requirements, in order to get the dynamic response of the bridge under the action of moving vehicle load, the bridge into the dynamic load test. The dynamic strain increment and natural vibration characteristics obtained from the dynamic test can reflect the service characteristics of the bridge and establish the initial structure files for the monitoring, maintenance and management of the bridge opening and closing operations.