Study On Method Of Monitoring System Of Concrete-filled Steel Tube Arch Bridge For The Evaluation Method

Due to the strong bearing capacity and the advantages of Concrete-filled steel tube(CFST)arch bridge,it has been applied more and more in bridge construction.Due to the structural characteristics of concrete-filled steel tubular structures that are easy to be eroded and the suspenders of the half-through arch bridge being damaged,many arch bridge collapses in recent years.Therefore,it is very necessary to carry out the health monitoring of CFST arch bridge in order to ensure the safety of the structure and avoid the accident in time.The research on bridge health monitoring system in our country mainly focuses on long-span suspension bridges and cable-stayed bridges.There is relatively little research on the health monitoring of CFST arch bridges.Most of the design methods of health monitoring system are also arranged empirically.Therefore,the current problems of health monitoring system and the design of monitoring system for CFST arch bridge are few.Based on the vulnerability analysis and the damage sensitivity analysis,an evaluation-oriented intermediate bearing Design Method of Steel Tube Concrete Arch Bridge Monitoring System.The main contents are as follows:Firstly,the general situation and the structural characteristics of Jiangnan Public Rail Transit over the Ming-Shen Highway in Songyuan City are introduced.The three-dimensional finite element model of the bridge is established by the finite element software ANSYS,and different load conditions are determined so that the different loads Vulnerability analysis under operating conditions.Secondly,through the static and dynamic analysis of the bridge,the dynamic response analysis and the earthquake effect under the coupling of the vehicle and the bridge are considered in the dynamic analysis.The vulnerability of the bridge is comprehensively determined through the structural response analysis,and the vulnerability of the bridge is comprehensively determined.Combined with the vulnerability analysis of damage location and combined with the actual injury status,set a variety of damage conditions,and consider the various components under different damage conditions on the damage sensitivity.Finally,according to the vulnerability and structural damage sensitivity,the importance of components is given the priority of the monitoring points arrangement and monitoring parameters,and gives a reasonable arrangement of monitoring system according to the priority given by the number of sensors,With the existing monitoring system of a concrete-filled steel tube arch bridge analysis and analysis of the pros and cons.Compared with the existing monitoring systems of other CFST arch bridges,this design method can use less sensors than other design methods while guaranteeing the monitoring purpose.When there are the same number of sensors,the measuring points arrangement is more based on And efficiency.