混杂纤维水泥基复合材料力学性能研究进展

摘要

Engineered cementitious composites (ECC)have been recently developed and widely used in civil engineering.ECC with consideration both of high strength and high strain capacity is hard to obtain by adopting mono fiber reinforced system.Instead,hybrid fiber method should be introduced to improve the mechanical behavior of composites.In this paper,current research are reviewed with special focus on both hybrid fibers of different dimensions and hybrid fibers of different constitutive relations.Several issues existed in current re-search on mechanical behavior of hybrid fiber reinforced cementitious composites have been discussed.Afterwards,several suggestions for future research on high ductile hybrid fiber reinforced composites are provided.%近年来发展起来的高延性纤维增强水泥基复合材料(ECC)在土木工程领域得到广泛应用.常用的ECC材料多为单掺纤维体系,难以实现高强度与高延性的匹配.为适应工程结构对材料性能的多重需求,可采用纤维混杂办法来提升材料力学性能.围绕不同尺寸纤维混杂、不同本构关系纤维混杂对相关研究现状进行了综述.讨论了混杂纤维水泥材料力学性能研究中存在的若干问题,在此基础上对高延性混杂纤维水泥基复合材料力学性能研究提出建议.