DURABILITY DESIGN FOR CONCRETE BRIDGE STRUCTURE BASED ON SUSTAINED LOADS IN MARINE ENVIRONMENT

摘要

In this paper, based on accelerated testing indoors, under the action of bending tensile stress on a marine high-performance concrete chloride ion diffusion coefficient, the results show that: Subjected to bend under the action of tensile stress and do not withstand the test piece chloride diffusion coefficient increases with increasing stress levels, different tensile stress and does not bear the stress of the concrete chloride ion diffusion coefficient ratio(DR/D0)exponential relationship with the stress level(η).In addition, addition, for a domestic Bridge, preliminary design to determine typical parameters of components and their environment is proposed to consider the durability of concrete structure load control index calculation method, to establish a "design life-chloride ion diffusion coefficient controlled targets" the correspondence between, for similar projects designed to provide a reference durability.