基于动态监测数据的桥梁安全状态评估  

Bridge safety status assessment based on dynamic monitoring data

作　　者：陈登国 季诺亚 薛海斌 CHEN Dengguo;JI Nuoya;XUE Haibin

机构地区：[1]清华大学合肥公共安全研究院,安徽合肥230601 [2]合肥市城市生命线工程安全运行监测中心,安徽合肥230601

出　　处：《智能城市》2025年第3期6-9,共4页Intelligent City

基　　金：铁路高质量发展安全保障体系及关键技术研究(P2023T002);安徽省科技攻坚计划项目(重点项目)(202423l10050030)。

摘　　要：文章基于桥梁上的加速度和应变动态监测数据,研究了桥梁在外部荷载作用下的振动响应特征,并评估其安全性。通过分析加速度数据的时域和频域,探讨桥梁振动特性,并结合应变数据对空心板梁桥的协同工作能力进行评价,进一步判断桥梁结构安全状态。结果表明,桥梁跨中振动幅度显著高于边缘人行道;模态识别显示监测基频与检测基频一致,均高于理论基频;多梁一致性分析验证了空心板梁的协同工作能力。该方法为桥梁状态评估和维护提供了科学依据。Based on dynamic monitoring data of acceleration and strain collected from the bridge,this paper investigates the vibration response characteristics of the bridge under external loads and evaluates its safety.By analyzing the acceleration data in both the time and frequency domains,the paper explores the vibration characteristics of the bridge.Furthermore,it assesses the cooperative working capacity of the hollow slab bridge using strain data,providing further insights into the structural safety status of the bridge.The results indicate that the vibration amplitude at the mid-span of the bridge is significantly higher than that at the edge of sidewalks.Modal identification reveals that the monitored fundamental frequency aligns with the detected fundamental frequency,both of which are higher than the theoretical fundamental frequency.Additionally,multi-beam consistency analysis verifies the cooperative working ability of the hollow slabs.This methodology offers a scientific basis for bridge condition assessment and maintenance.

关 键 词：安全监测 模态频谱 振动 一致性 

分 类 号：U443[建筑科学—桥梁与隧道工程]