Reinforcement Measures Research And Technical Condition Evaluation Of Rigid Frame Arch Bridge

Derived from engineering practice in our country,rigid frame arch that integrated the technical feature of different archs(hyperbolic arch bridge and truss arch bridge)was widely applied to highway and municipal road.As a kind of artificial construction,bridge has own internal lifecycle.The majority of bridge are in service under overload conditions due to the increase of traffic volume in our country.The bridge could happen different diseases under comprehensive adverse conditions as time goes on,which has an great influence on bridge elegance and even threat the life property safety of traffic participants.Bridge reinforcement is defined as a measure promoting the whole bridge capacity through technological upgrading or increasing bridge components.The reinforcement scheme for rigid frame arch is a comprehensive decision progress.Whether the scheme is reasonable affect directly the quality,cost and safety of bridge project.Thus,it is a basic guarantee for the maximizing total efficiency to select a reasonable scheme and construction technology.Based on the relative research at home and aboard,the technical condition evaluation was introduced.The state of supported project was identified according to the technical condition evaluation method.From the standpoint of theory,the principles,demands and basic approaches were elaborated.The correspont measures were put forward,combined with the different characteristics of arch.Based on Mdias Civil platform,the numerical analysis model and theory computation were developed.Besides,the deflection,strain and capacity of supported arch were analyzed through static and dynamic load test,which indicates the reinforcement measures are resonable and feasible.The reinforcement scheme evaluation and measures of rigid frame arch were researched in this paper from theory and demonstration aspects,which had a certain reference for treating the old rigid frame arch.