基于应变指标的桥梁监测评估方法和数值模型分析  

ANALYSIS OF BRIDGE MONITORING AND EVALUATION METHOD AND NUMERICAL MODEL BASED ON STRAIN INDEX

作　　者：田桐 TIAN Tong(The Third Engineering Co.,Ltd.of CCCC Second Highway Engineering Co.,Ltd.,710016,Xi'an,China)

机构地区：[1]中交二公局第三工程有限公司,西安710016

出　　处：《建筑技术》2023年第7期872-874,共3页Architecture Technology

摘　　要：根据现场目视检测,目标桥钢筋混凝土桥面的中间跨度处存在较大裂缝。这种特定类型的损伤可能会影响桥梁的结构性能,应对其进行监测。在目标桥梁上建立了结构健康监测系统,利用基于应变指标的评估方法定量确定桥梁状况。采用不同类型的钢筋混凝土裂缝形态对桥梁的有限元模型进行建模,以表示桥梁损伤的严重程度。在此基础上,生成了损伤程度与应变测量值之间的关系,建立了基于应变指标的桥梁监测曲线。According to the field visual inspection,there are large cracks in the middle span of the reinforced concrete deck of the target bridge.This particular type of damage may affect the structural performance of the bridge,so it should be monitored.In this paper,the structural health monitoring system is established on the target bridge,and the evaluation method based on strain index is used to quantitatively determine the condition of the bridge.Different types of reinforced concrete cracks are used to model the finite element model of the bridge to show the severity of the bridge damage.On this basis,the relationship between damage degree and strain measurement value is generated,and the bridge monitoring curve based on strain index is established.

关 键 词：桥梁监测 钢筋混凝土桥面 有限元模型 应变 挠度 

分 类 号：TU753[建筑科学—建筑技术科学]