Reliability Evaluation And Study On New Reinforcing And Reconstructing Techniques Of Two-Way Curved Arch Bridge

The applied means of Two-way Curved Arch Bridge appraisal were put up first in the paper, namely field statistics and theoretical calculation integrated means,brought the appraise of Two-way Curved Arch Bridge bearing capacity before reinforcement gotten feasible。On apparent test and bearing capacity appraisal,incorporating "highway bridge curing norm ",bring forward reinforcing Two-way Curved Arch Bridge condition evaluation clearly。On summarizing the common methods of reinforcement and reconstruction,bring forward a series new methods of reinforcement and reconstruction -from extrados reinforcing Two-way Curved Arch Bridge,including mostly reinforcing vault and skewback critical sections,at the same time optimizing deck structure reinforcement method;only reinforcing skewback(or empty stomach part)reinforcement method;altering arched arch construction for beam-arched arch reinforcement method。and combining condition of health rating with reinforcement method,as for different quality grade to select different reinforcement method。Through our years'research and practical exercises,either thought that comparing with other strengthening means or rebuilding bridge,its strongpoint is outstanding:reinforcement effect good;and the cost saved,approved economizing large funds;the construction convenient,strengthening time short。In the end,introducing the notion of reliability and time-dependent reliability。utilizing statistical parameters of"Unified standard for reliability design of highway engineering structures "(1999), work out reliability evaluate to reinforcing Two-way Curved Arch Bridge, and considering mobile load changing,resisting-power decaying down,proceed lifetime prediction to reinforcing Two-way Curved Arch Bridge。So,the presentation put forward a set of whole reinforcing and reconstructing method ,ie evaluation(test and grade estimation)-reinforcement and reconstruction-evaluation(reliability evaluation) reinforcing method clue。these methods have been apllied in many Two-way Curved Arch Bridges,we expect they have supervising action to other analogous reinforcing bridges。...