海洋环境条件下碱骨料反应对海洋结构物性能影响的研究现状、存在问题及其发展趋势

海洋环境中有害物质侵蚀是造成海洋结构物性能劣化的主要原因。本文从影响碱骨料反应膨胀因素、氯离子与碱骨料反应共同作用对碱骨料反应膨胀行为影响、氯离子扩散与结合行为影响和力学性能损伤及损伤模型等方面出发，对海洋环境下碱骨料反应对结构物性能影响研究现状进行总结。分析此研究领域存在问题。提出了需引入能更准确反映碱骨料反应下材料损伤程度的变量参数；需加强氯离子与碱骨料共同作用下多维应力状态下混凝土长期力学性能演化规律研究；建立三轴应力状态下混凝土损伤的本构模型等新的研究思路。

Research Status,Existing Problems and Development Tendency on Effects of Alkali-Aggregate Reaction on Property of Marine Structures in Marine-Environment

The ingress of the harmful substance in the marine environment is main reason to cause the degradation of properties in the marine structures .This paper presents a review of research on the effect of the alkali-aggregate reaction on the properties of structures under marine environment from four aspects,i.e.the influence factors of the alkali-aggregate reaction expansion , the swelling behavior of alkali aggregate reaction , the chloride ion diffusion and chloride ion binding behavior , the mechanical properties damage and damage model under the combined action of the chloride ion and the alkali -aggregate reaction.Also,the existing problems in this study field are analyzed .The new research ideas on the effect of alkali-aggregate reaction on the properties of structures under marine environment are proposed.First,the new parameter must propose to more accurately reflect material damage degree under the alkali-aggregate reaction .Second , the study on the evolution of the long-term of the mechanical properties under the combined action of the chloride ion , the alkali-aggregate reaction and multi-dimensional stress need to increase .Finally,the constitutive model of concrete damage under three axis stress state is established .