Research On Construction Monitoring And Health Monitoring Of A Continuous Rigid Frame Bridge Based On The Internet Of Things

In recent years,in our country,continuous rigid frame bridges have been widely used.Over time,influenced by external factors such as concrete material properties,construction environment,construction technology,etc.continuous rigid frame bridge concrete box girder internal cracks,reinforcement corrosion and exposure reinforcement,main girder deflection,prestress reduction and strength stiffness stability reduction Some diseases have posed a great hidden danger to the safe use of rigid frame bridges.In order to secure the safety and reliability of bridges,it is necessary to analyze and compare important control variables during construction and operation,and research on the construction monitoring system and soundness monitoring system and monitoring of bridge structure diseases are necessary.Realtime with the support of the system.Taking the span of the main bridge of Wen tang Bridge 370m(95m + 180 m +95m)as an example,a structure was simulated and a construction monitoring system was established.It is based on the Internet of Things theoretically based on the key control variables of the bridge construction stage,and a health monitoring system It is integrated with to form an integrated bridge monitoring(control)system.This article analyzes the continuous rigid frame bridge from the following aspects:(1)Summarizes the contents of construction monitoring of continuous steel frame bridges across long spans,and introduces the main influencing factors of construction monitoring,the method of calculating the monitoring structure,and the contents of the construction monitoring system.(2)The engineering background of this article is realized in a continuous steel frame bridge with a high pier of Wontang Bridge 1.Building a bridge model 2.Analysis of calculation results 3.Sensitivity analysis of deformation parameters 4.Analysis Results of construction monitoring system.Construct a finite element analysis model using Midas / civil and perform construction simulation calculations.The results are used to analyze the stress and deflection changes of the bridge during the cantilever construction process.Analyze the law of change in stress and deflection of span closure,10-year contraction,and creep main beams.The main control section and control parameters are determined,and the change of parameters directly affects the deformation and internal forces of the structure.Analysis of the results of the monitoring system is carried out through three aspects: linear monitoring,stress monitoring and temperature monitoring.(3)Based on the design of the bridge condition monitoring system of Internet of Things(Io T),we have built a highly intelligent bridge condition monitoring system to efficiently monitor the structural condition of the bridge and receive feedback by monitoring the condition of the bridge in real time.employee.Internet of Things technology is applied to bridge monitoring(control)to ensure the efficiency and data transmission intelligence of bridge monitoring(control)data,and to ensure safe and reliable construction and operation of bridges.(4)The integration of construction monitoring and soundness monitoring system is combined with the construction monitoring status and soundness monitoring system of Yuantang Bridge project to build a complete bridge monitoring(control)system,and provide hardware equipment,software equipment and informatization.The technical design realizes the integration of building monitoring and condition monitoring systems.