ECC材料性能进展及其在建筑结构中的应用
Development of ECC materials properties and its applications in building structure
蔡履沐 1叶斌斌 2王海深 2潘鹏2
作者信息
- 1. 平潭综合实验区管廊投资管理有限公司,平潭 350400;平潭综合实验区市政园林有限公司,平潭 350400
- 2. 清华大学土木工程安全与耐久教育部重点实验室,北京 100084
- 折叠
摘要
ECC材料是一种以微观力学原理为指导配制出的纤维增强水泥基复合材料.经多年发展,其强度和延性均得到显著提高,并在工程结构中逐步得到应用.对ECC材料的基本力学性能、钢筋与ECC材料组成的RECC构件的基本力学性能,以及ECC材料在结构构件塑性铰区的应用等研究进行了梳理和总结.结果表明:ECC材料不仅能显著提高RECC构件的承载能力、变形能力和往复荷载下的耗能能力,而且能有效控制RECC构件的裂缝宽度,提高工程结构的耐久性.但是,现有研究中也存在采用的ECC材料普遍延性偏低,对RECC构件基本力学性能和长期性能研究不足等问题.
Abstract
Engineered cementitious composites(ECC)material is a fiber-reinforced cement-based composite material prepared under the guidance of micromechanical principles.After years of development,its strength and ductility have been significantly improved and gradually applied in engineering structures.The basic mechanical properties of ECC materials,the basic mechanical properties of reinforced engineered cementitious composites(RECC)members composed of steel bars and ECC materials,and the application of ECC materials in the plastic hinge zone of structural members were reviewed and summarized.The results show that the ECC materials can not only significantly improve the load capacity,deformation capacity and energy dissipation capacity of RECC members,but also effectively control the crack width for of RECC members and improve the durability of engineering structures.However,there are also some problems in the existing research,such as the low ductility of ECC materials and the lack of research on the basic mechanical properties and long-term performance of RECC members.
关键词
ECC材料/RECC构件/力学性能/研究进展/抗震性能Key words
engineered cementitious composites material/reinforced engineered cementitious composites member/mechanical performance/research progress/seismic performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据