Research On Structure Capability Of Reinforced Concrete Arch Bridge Strengthened By "Energy-released Method"

The technology of reinforcement to old bridge is a new task. At first author introduce mandate and situation of bridge reinforcement, development status and diseases of arch bridge, design principles of reinforcement , basic technical requirements and significance of reinforcement and the main contents of research in this paper of arch bridge and so on;and introduce detaily development,features,diseases analysis and cause and reinforcement of diseases of reinforced concrete arch bridge.In next research of text content, based on structure mechanics theory, author introduce detaily basis theoretical and mechanics of reinforced concrete arch bridge,characteristics and analysis and calculation method of reinforced concrete arch bridge after reinforced,in text anthor also analysis effect of crack - the released of internal forces with knowledge of fracture mechanics in principle of realeased energy method.In research of core content, with a project backdrop of Guizhou Qingjiang big bridge ,author applicant big model currency limited buck analyze software MIDAS/Civil, separately found and analysis space limited model of no-hinged arch under the quiet power load condition and in the condition of combination load before reinforcement;and checking carrying capacity under original design loads before reinforcement,and prove this bridge is not satisfied with need of highway grade through checking carrying capacity under reinforcement design loads before reinforcement,so it must be reinforced.At last checking carrying capacity after reinforcement of reinforced concrete arch bridge in Released Energy Method.On this basis,from carring capacity envelope diagram analysis and security analysis, it prove that reinforced concrete arch bridge and is satisfied with need of highway grade and is safety,feasible after reinforcement in released energy method.