Chlorine Ion Under The Action Of Steel - Concrete Composite Beams Durability

Steel-concrete composite beam has the advantages of both steel structure and concrete structure, and it would has vast application prospect .However, we emphasize the security and applicability but ignore the durability of structure in structure design. And this would make the structure failure before it's service deadline, and lead to a grate economic loss. This article aim at the problems in studying the steel-concrete composite beam, study the deterioration law and damage mechanism by quick electrochemical corrosion experiment in chloride case. The main contents include:(1)This article aim at three kinds section form of the steel-concrete composite beam, study the route through which chloride ions into the steel-concrete composite beam by quick electrochemical corrosion experiment, and provide experiment background for the study of durability of steel-concrete composite beam.(2)Compare the effects on push-out specimens performance of bolts' corrosion and steel beam's corrosion by quick electrochemical corrosion experiment. Study the variation rule of tension and shear performance of the blot after its' corrosion. Get the depressed coefficient of the corroded bolt by fitting, provide base for the studying durability of steel-concrete composite beam.(3) Compare the effects on steel-concrete composite beam of bolts' corrosion and steel beam's corrosion by quick electrochemical corrosion experiment. Study the variation rule of mechanical property of steel-concrete composite beam of the blot after its' corrosion. Get the formula of the ultimate bearing capacity of partial shear connection steel-concrete composite beam, and compare the calculation result and experiment result, verify the Practicability of this formula.