Management Strategy Of Mediun And Small Spanbridges With Normal Service Reliability

With the development of the society in recent years,people have more and more demand for transportation,and the transportation of highway bridge is increasing,and the overload phenomenon is becoming more and more serious.As the key part of transportation,the bridge is affected by the factors such as load,traffic volume,external environment,design standard,engineering materials and so on,the influence of such factors as will inevitably on the bridge structure damage,leading to a bridge carrying capacity decreased,and the bridge phenomenon such as aging,fatigue,damage,to the normal use of the bridge.Based on the research of small and medium-sized Bridges and the research status of bridge and bridge management system,this paper further studies the application of small and medium span bridge management system.Firstly,the common diseases and causes of the diseases are analyzed in the operation of small and medium span bridges,and suggestions for maintenance and reinforcement are proposed,bridges should pay more attention to such problems in maintenance and management.Secondly,analyze the normal use limit state of structure,and define the concept of normal use reliabilit,the crack width and deflection reliability index of the affected components are calculated by using the response surface method and ANSYS software finite element model.The model of reliability index degradation model was established,the reliability index change model for multiple maintenance was created.The maintenance strategy optimization model was established,too.According to the results of reliability index,a bridge management strategy is proposed by the reliability of traffic network.Finally,starting from the function orientation of bridge maintenance management system,a component is suitable for small and medium span bridges reasonably intelligent bridge maintenance decision-making mechanism,to formulate timely and effective bridge maintenance managenment measures,it provides a useful thought for the management of bridge and the maintenance of construction project.