Reasonable And Durable Structure Of Reinforced Concrete Simple-Supported Beam Bridge Based On Durable Indicator

This paper combined with the structural features of reinforced concrete simple-supported beam bridges, based on available research results, through multi-index grading weighting method created the indicators of reinforced concrete simple-supported bridges'durability. And applied the indicators in one concrete simple-supported bridge, adjust concrete cover thickness, diameter of steel bar and other detail structures, analysis each detail structure' affect on the durability of bridge, so as to make sure rational structure of the bridge, supply gist with bridge structural viability evaluation and design.This paper had done as follows:1.On the basis of analyses both here and abroad about reinforced concrete simple-supported bridge durability production, specific to primary influence factors of reinforced beam bridge, select rational durability criteria, through multi-index grading weighting method create a formulae of single component indicator.2.Consider the importance of each single component in structural system, create a formulae with component significance cofficient, which can computing concrete simply supported beam bridge durability indicator.3.Combine the characteristics of concrete simple-supported bridges, with main beam, bridge deck, bridge pier and foundation as main components, create a hierarchical model of concrete simple-supported bridges' durability,reference to historical research findings, determined each single component' weight vector and its importance factor through Analytical Hierarchy Process.4.Take one reinforced concrete simple-supported T-beam bridge for example, use the durability indicators created in this paper judged endurance life of the bridge, based on this work,by adjust, diameter of steel bar and other detail structures, analysis each detail structure' affect on the durability of bridge, use bearing capacity and economical efficiency as the constraint condition, ascertain concrete simple-supported beam bridge in reasonable duration structure.By the medium of durability exponential analysis of variance, suggest that the thickness of concrete cover may have little increase on the basis of the, diameter of steel bar and grade of concrete, in condition of meet the requirement of criterion,may chose a lower value.