The hinge joints of the assembled concrete multi-girder bridge (ACMGB) are the main components of transverse transmission of loads and the decline of their transmission capacity would lead to the degradation of the transverse cooperative working performance (TCWP) of the multi-beam system. As the key working performance of this kind of bridges, its severe degradation would result in the single-girder-bearing phenomenon inducing bridge collapse. In order to detect TCWP degradation timely, this paper proposes a vibration-based monitoring scheme of the ACMGB, where structural vibration information are collected by accelerometers and dynamic strain guages at the bottom of girders in mid-span. These monitoring data are then used for identifying transverse mode shape of the multi-beam system and its derivated index in order to evaluate TCWP. This scheme has been implemented on three adjacent ACMGBs in Tongji Road Viaduct and the preliminary analysis of monitoring data proves the effectiveness and rationality of the monitoring scheme proposed in this paper, which has the potential of the TCWP evaluation.

中文翻译：

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基于振动的装配式混凝土多梁桥横向协同工作性能监测：系统设计、实现与初步应用

装配式混凝土多梁桥（ACMGB）的铰节点是荷载横向传递的主要构件，其传递能力的下降会导致多梁系统横向协同工作性能（TCWP）的下降。 . 作为此类桥梁的关键工作性能，其严重退化会导致单梁承重现象导致桥梁倒塌。为了及时发现TCWP退化，本文提出了一种基于振动的ACMGB监测方案，其中结构振动信息由跨中梁底部的加速度计和动态应变仪采集。然后将这些监测数据用于识别多波束系统的横向模式形状及其衍生指数，以评估 TCWP。