Envelope Of Internal Force Evaluate Application Technolgy Research To Continuous Rigid Frame Birdge

Bridge health monitoring and safety assessment is the hot spot content and directionof bridge engineering personnel research at home and abroad. With the development ofscience and technology, the bridge span is growing, the bridge structure form is gettingmore and more complicated, the people to these large important bridges’ safety,durability and normal use function is concerned, bridge health monitoring and safetyassessment arises at the historic moment. Nowadays, at home and abroad, in bridgehealth monitoring and safety assessment, people have done many explorations andpractices for researches which in the usual comprehensive evaluation method andanalytic hierarchy process (AHP), defect status indicators method, based on the theoryof reliability assessment method and the neural network method, genetic algorithmmethod and so on, but the bridge itself exists the uncertainty factors which includedesign, material, structure, working environment, monitoring signal and so on, causingso far not form systematic bridge health monitoring assessment theory and method. I amunder the guidance of tutor, put forward based on internal force envelope assessmentapplication technology research to the continuous rigid frame bridge, and the nearlythree years of hard time, completing the related research work.This paper analyzes the background of the remote monitoring and evaluation of thebridge, meaning at home and abroad of the status quo, and expounded the principles andmethods of internal force envelope assessment of continuous rigid frame bridgeapplications, overall system to evaluate continuous rigid frame bridge applicationsbased on the internal force envelope. Based on the above, focusing on the envelopebased on the internal forces assess the specific application of continuous rigid framebridge.The paper uses the maximum principle in the mathematical processing ofmonitoring data, to obtain the maximum load effect; On this basis, the resistance ofmaterials, geometry, and mode of calculation on the actual bridge structure of the state,combined with road reinforcedconcrete and prestressed concrete bridge designspecifications (JTG the D6-2004) bearing capacity limit state calculation of therequirements of materials, geometric size correction to get real-time resistance andserviceability limit state in design requirements for its crack, crack width anddeflectionprescribed limits as resistance. Force Envelope theory, based on the ForceEnvelope bridge safety assessment methods. Finally, Yunnan Pu misty Bridge rely onthe use of the principle of maximum load effect, based on monitoring data to assess theapplication based on the Force Envelope continuous rigid frame bridge applicationtechnology assessment of the safety of the bridge, and verify the feasibility andreliability of the technology.the maximum principle based on measured data to predict the maximum load effects,and combination of norms to assess the bridge. Solved to some extent based only onmeasured data on the bridge to assess the accuracy and subjective. The results of theirresearch has good prospects for engineering applications and are expected to achievesignificant economic and social benefits.