摘要
在地震作用下,钢筋混凝土结构易发生混凝土剥落、结构连续性倒塌等破坏。工程设计水泥基复合材料(ECC)的韧性好、变形性能优异,具有明显的拉伸应变硬化效应和多缝开展特征,将其应用于建筑结构代替普通混凝土材料,可较好地满足结构抗震性能方面的要求。从试验、理论及有限元分析的角度,系统介绍了ECC材料的拉压力学性能和ECC梁、柱、节点和框架等构件或结构的抗震性能。国内外研究表明,在低周往复荷载作用下,ECC构件裂缝细密,其变形、延性及耗能混凝土结构有较大提升,减少箍筋用量也能避免结构或构件发生剪切失效。在地震作用下,ECC结构比混凝土结构的破坏程度大为减轻。
Under earthquake actions, the reinforced concrete structure is prone to damage because of concrete spalling or progressive collapse. Engineered cementitious composite (ECC) has many advantages, such as good toughness, excellent deformation performance, strain hardening and multiple cracks development. Using ECC to replace concrete can meet the structure seismic performance requirements. From the perspectives of experiment, theory and finite element analysis, the tensile behavior of ECC and the seismic behavior of ECC beams, columns, joints and frames are introduced. Researches at home and abroad have shown that ECC component has many fine cracks under low-cycle reciprocating loads. Compared with concrete structures, deformation, ductility and energy dissipation ability of ECC structures are greatly improved. And ECC structures or members can also avoid shear failure if its stirrups are reduced. Under earthquake actions, the ECC structure is much less damaged than the concrete structure.
作者
龚宏伟
江世永
飞渭
陈进
李炳宏
GONG Hong-wei;JIANG Shi-yong;FEI Wei;CHEN Jin(Department of Military Facility, Army Logistics University of PLA, Chongqing 401331, China;School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第7期116-124,共9页
Fiber Reinforced Plastics/Composites
基金
重庆市高校优秀成果转化资助重点项目(KJZH14220)
重庆市社会民生科技创新专项项目(cstc2015shmszx30006)
关键词
ECC
力学性能
混凝土结构
抗震性能
ECC
mechanical behavior
concrete structure
seismic performance
