Study Of Base On Time-dependent Reliability Beam-bridge Reasonable And Durable Structure

Whether beam-brigde's structure construction is reasonable effects construction resistance and durability performance. In china study of reasonable and durable strcture is not enough. There is no theoretical analysis about reasonable and durable strcture.This paper first put forward the concept and idea of reasonable and durable structure construction. The analysis method which extend construst life and consider economy and construction. According to concrete beam-bridge durable disease, summarize beam-brigde's design principle and improvement measures. Formed analysis method which base on time-dependent reliablility with structural bearing capacity relibility index as measure standard.Base on basic the theory of reliability built resistance and load both change with time model. Using time-dependent reliablility theory to analy practical bridge.Form reasonable and durable view evaluate in service beam-bridge. Comparative analysis beam-bridge's different reinforcement diameter, cover thickness and concrete strength, obtainde different factors influence. During different factors infulence determinat the minimum and optimal cover thickness. This analsis method base on time-dependent reliablility can be use to new and in serivce beam-brigde.