Research On Construction Monitoring Technology Of Span Curved Continuous Beam Bridge

Curved bridge is a structure form to adapt to the requirements of terrain and surface features.Compared to straight bridge or skew bridge,the coupling effect of crankle is the stress characteristics of curved bridge.It is also the most important factor in which the unloading Inboard and loading lateral of curve.When the angle of the central is smaller and the wide of bridge is larger,it will become an obvious difference between the inside and outside,the inner may even become tensile stress.In view of the characteristics of curved bridge,it is necessary to tracke omnibeare and control with real-time between the process of construction.To make sure the safety of construction,and the type of line and the force of the internal to meet the design of requirement.It has a long history since the development of bridge construction and monitoring technology,the content and methods of Monitoring is becoming more and more maturing.This article combined with an engineering example to research on bridge construction monitoring technology.Using a finite element analysis software MIDAS Civil to establish a full bridge model,for every segments of cantilever construction will take real-time tracking monitor.Based on the basic linear and internal force,the whole process of bridge construction is monitored,make sure line and internal forces of the final bridge meet the design requirements,and also guarantee safety of construction.Besides,it is taking into consideration for safety operation of bridge which in service.This article put forward to monitor the health status of in-service bridges.From passive reinforcement and maintenance to active health state monitor,thus to maintenance the existing bridge to keep health status in targeted,to make it safe and durable operation.The main contents of this paper are as follows:(1)This article introduced The development of procession and general situation of curved bridge briefly,and the difference between straight bridge or skew bridge.It also summarizes the development of construction monitoring technology in domestic and abroad briefly,it also put forward to the focus of this paper.(2)The content and method of construction monitoring are introduced in detail,and various of factors.It put forward to three methods of simulation analysis of bridge construction process,include theory and method of the parameter error(3)It demonstration of construction monitoring technology scheme(line,internal force,side and middle span)with engineering examples.Building a full-bridge by finite element model,analysis by using an finite element software.Inductive sorting of data of linear and internal force.(4)In the prospect and conclusion part,due to the large radius of curvature(600m),and the span is small(38.5 +77 +38.5m),therefore,in the bridge ring and the radial direction of the line displacement and along the x,y,z axis of the twist angle are relatively small,there is not need to set the correction value.After the bridge is closed,the ideal state is obtained,and the rationality of the assumption is explained.It summarizes the construction monitoring of technology theory,and make a forecast that the development of direction of construction monitoring.The theory of research curved bridge is not enough,computational accuracy needs to be further improved.(5)The span is small(38.5 +77 + 38.5m),and the radius of curvature is larger(600m)Therefore,in the bridge ring,radial direction of the line displacement and along the x,y,z axis of the twist angle are relatively small,in the actual construction control may not need to set the correction value.After the bridge is closed,the ideal state is obtained,and the rationality of the assumption is explained.Finally,the future development of monitoring the development direction.There are still some shortcomings in the theoretical study of bending bridge,and the calculation accuracy needs to be further improved.