关键词: 干湿循环;海洋环境;研究现状;存在问题;发展趋势

Abstract: The dry-wet cycles is one of main reasons causing the degradation of the properties of the structure concrete in the dry-wet alternate zone.The structures of the dry-wet alternate zone in the marine environment are easily damaged by the coupling effect of the environmental factors and the dry-wet cycles.This article presents a review of research on the effects of the dry-wet cycles on the properties of the structures under the marine environment from three aspects, i.e.the mechanism of the damage under the dry-wet cycles, the influence factors of the dry-wet cycles, the evolution law of the mechanical and the durability properties under the combined action of the dry-wet cycles and the environmental factors.Moreover, the existing problems in this research field are analyzed.Some new research ideas about the effects of the dry-wet cycles on the properties of the structures under the marine environment are proposed.First, the study on the effect of the conditions of the dry-wet cycles on the evolution of the properties in the concrete under the dry-wet cycles needs to increase.Second, the evolution law of the mechanical properties of the concrete under the combined action of the dry-wet cycles and the alkali-aggregate reaction needs further research.Then, the new index must propose to more accurately reflect the damage degree of the mechanical properties under the dry-wet cycles.Finally, the evolution of the long-term properties of the concrete under the three axis stress must be tested.

Key words: dry-wet cycle;marine environment;research status;exist problem;development trend