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对重庆跨坐式单轨交通的预应力钢筋混凝土轨道梁、墩体结构进行了动力试验,测试其动力特性及在不同行车速度下的动力响应。测试及分析结果表明,预应力钢筋混凝土轨道梁结构实测自振特性与理论计算结果基本相符;轨道梁结构具有较好的竖向刚度和结构强度;单轨车辆以不同速度通过桥梁时,试验梁横向基频、横向加速度等横向振动性能与《铁路桥梁检定规范》的要求有一定差异;运行单轨车辆对轨道梁结构有一定的冲击作用,但不显著;墩体结构横向动力性能良好,满足限值要求。
Dynamic tests on the prestressed concrete track girders and piers of straddle monorail traffic in Chongqing were carried out to test their dynamic characteristics and dynamic response under different driving speeds. The test and analysis results show that the measured natural vibration characteristics of the prestressed reinforced concrete track beam structure are in good agreement with the theoretical calculation results. The track beam structure has good vertical rigidity and structural strength. When the monorail vehicle passes the bridge at different speeds, The transverse vibration performance such as fundamental frequency and lateral acceleration are different from the requirements of Railway Bridge Inspection Code. The monorail vehicle has a certain impact on the track beam structure, but it is not significant. The transverse dynamic performance of pier structure is good and the limit value is satisfied Claim.