Bridge safety status assessment based on dynamic monitoring data

CHEN Dengguo; JI Nuoya; XUE Haibin

doi:10.19301/j.cnki.zncs.2025.03.002

Abstract：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.