Method for Vibration Frequencies Inspection of Medium and Small Bridges Using Smartphone-Based Accelerometers

This study proposes a bridge structural vibration frequency inspection method based on built-in smartphone accelerometers. The uploaded data consists of the raw acceleration data acquired. The file naming convention is: "Bridge Type & Measurement Point - Mounting Method - Sampling Frequency - Sampling Duration - Acquisition Device". "JZ" represents a simply-supported beam bridge, "GG" represents a rigid-frame bridge. For simply-supported beam bridges, the measurement point is at the mid-span. For the four-span rigid-frame bridge, numbers 1, 2, and 3 denote the mid-span of the second span, the quarter-point of the third span, and the mid-span of the third span, respectively. "GD" indicates fixed mounting, "ZY" indicates free placement. Sampling frequencies are 200 Hz, 100 Hz, and 50 Hz. Files ending with "SJ" contain data collected by smartphones; files ending with "XT" contain data collected by the health monitoring system. This data can be used for investigating the performance parameters of smartphone accelerometers and for research related to structural natural vibration frequencies.

本研究提出了一种基于内置智能手机加速度计的桥梁结构振动频率检测方法。所上传的数据为采集得到的原始加速度数据。文件命名规范为：「桥梁类型与测点-安装方式-采样频率-采样时长-采集设备」。其中「JZ」代表简支梁桥（simply-supported beam bridge），「GG」代表刚构桥（rigid-frame bridge）。针对简支梁桥，测点设置于跨中位置；对于四跨刚构桥，编号1、2、3分别对应第二跨跨中、第三跨四分之一点以及第三跨跨中。「GD」表示固定安装，「ZY」表示自由放置。采样频率可选200 Hz、100 Hz与50 Hz。后缀为「SJ」的文件为智能手机采集的数据，后缀为「XT」的文件为健康监测系统采集的数据。本数据集可用于研究智能手机加速度计的性能参数，以及开展结构固有振动频率相关的研究工作。