上海市崇启大桥南引桥结构健康监测系统设计

Design of Structural Health Monitoring System for South Approach Bridge of Chongqi Bridge in Shanghai

摘要:

为保障上海市崇启大桥南引桥运营安全，提升桥梁养护管理数字化水平，结合该桥结构特点、滨海高盐雾服役环境及相关政策要求，对其开展结构健康监测系统设计。首先，在综合考虑基础上，选择该桥第7联左幅桥、第8联左幅桥、第8联右幅桥、第9联左幅桥作为代表性桥跨；然后针对环境、作用、结构响应和结构变化4类监测项目，配套采用光纤光栅传感器、动态称重仪、机器视觉等设备，成功构建了由传感器模块、数据采集及传输模块、数据处理及管理模块、数据分析应用模块组成的系统架构。该系统可实现结构状态实时感知、数据智能处理、超限预警和健康度综合评估，为桥梁损伤识别、安全预警、养护决策及全生命周期管理提供支撑，可为滨海环境下大跨度连续梁桥健康监测系统设计提供参考。

Abstract:

To ensure the operational safety of the south approach bridge of Chongqi Bridge in Shanghai and improve the digitalization level of bridge maintenance management, combined with the structural characteristics, coastal high salt fog service environment and relevant policy requirements of the bridge, its structural health monitoring system is designed. Firstly, on the basis of comprehensive consideration, the left span of the 7th span, the left span of the 8th span, the right span of the 8th span and the left span of the 9th span of this bridge are selected as representative spans. And then for on four types of monitoring items such as environment, action, structural response and structural variation, the fiber Bragg grating sensors, dynamic weighing instruments, machine vision and other devices are equipped to successfully build the system framework consisting of sensor module, data acquisition and transmission module, data processing and management module, and data analysis and application module. The system can realize the real-time perception of structural state, intelligent data processing, over-limit early warning and comprehensive health assessment, providing support for bridge damage identification, safety early warning, maintenance decision-making and life-cycle management, which can offer a reference for the design of structural health monitoring systems for long-span continuous beam bridges in coastal environments.