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Reliability Of Structural Capacity Of Existing Arch Bridge Assessment Study

Posted on:2004-08-04Degree:MasterType:Thesis
Country:ChinaCandidate:J WangFull Text:PDF
GTID:2192360095957635Subject:Bridge and tunnel project
Abstract/Summary:PDF Full Text Request
If the structure reliability of the existing arch-bridges is analyzed and its current and future reliability level on bearing capacity is presented, it will profit the highway development and administration department in making an economic and reasonable decision on the maintenance of the arch-bridges.In this dissertation, the structure bearing capacity reliability of the ecardinal arch-bridge is researched by Structure Reliability Theory and its reliability assessment model on bearing capacity is established. The system reliability analysis method of arch-bridge is presented based on the failure model of arch rib, which is the most important failure model of arch-bridge. The control sections of arch rib in the analysis of bearing capacity reliability are determined according to the "five-spot coincidence method", which is often used in arch-bridge design with Chinese code. The representative failure models of arch rib are searched and the rib section resistances are calculated by incremental method and disadvantage loading in the control sections. The structure reliability assessment index on bearing capacity of the arch-bridge is calculated by the function of bearing capacity reliability, structure resistance probability model, load action effect probability model and JC method.The time-variation reliability formula of the existing bridge in its life cycle is deduced based on Markov process. Lastly, the minimum permission reliability index is offered by the method of "calibration method" which makes back calculation out of the bending resistance reliability and the compression resistance reliability of the reinforced concrete member in norm.
Keywords/Search Tags:the existing arch-bridge, bearing capacity, reliability, assessment model, structure resistance, load action effect, life cycle reliability, the minimum permission reliability index
PDF Full Text Request
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