Eccentric Compression Behaviors of Strain-Hardening Cementitious Composite Columns
Engineered cementitious composite (ECC) is a type of high-performance composite with pseudo strain hardening behavior and multiple cracking properties.The cracking and durability problems induced by concrete brittleness can be effectively avoided by substituting concrete with ECC.In this study, a total of eight steel-reinforced columns with various longitudinal reinforcement ratios and load eccentricities were tested under eccentric compression.It was determined from the test results that steel-reinforced ECC (R/ECC) columns exhibit superior performance to reinforced concrete (RC) columns in terms of load-carrying capacity, ductility, crack control ability, and damage tolerance.All columns finally failed in matrix crushing;however, the failure pattems of R/ECC columns are extremely different from those of RC columns.Significant concrete spalling occurred in the RC columns, while no sign of ECC spalling was observed in the R/ECC columns, owing to the fiber bridging effect of ECC.In the RC columns, the crack width increases almost linearly with the applied load and reaches as high as 2 mm prior to the ultimate strength, while in the R/ECC column, the maximum crack width firstly increases and thereafter remains constant at approximately 60 μ m with an increasing compression load.
F.Yuan M.C.Chen
School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, China
国际会议
福州
英文
893-901
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）