Abstract：In the factors affecting the behavior of steel reinforced concrete (SRC) columns, the shape distribution of encased steel section is an important one. In this study, the coefficient of shape distribution (denoted as D) of encased steel section, the factor of section modulus α and the factor of confined concrete β are defined and employed to quantitatively evaluate the shape distribution extent of encased steel section. A series of SRC columns with steel ratio of 15% and different D values were tested under monotonic axial compression and bending loads, and then finite element analysis was carried out. Based on the results, the influences of shape distribution on the bearing capacity and ductility of structural members were investigated. The results indicate that SRC columns with high steel ratio possess high bearing capacity, good ductility, steady load-displacement curves, and mild developments of experimental phenomena; the bearing capacity of SRC column linearly increases with the increase of the factor α or the increase of the factor β, while the bearing capacity has a good linear relationship with D value; the residual bearing capacity of SRC columns in the later period of loading increases with the increase of D value. Based on the experimental results and the finite element analysis results, the limit value for the thickness ratio of flange to web of the encased steel was deduced for the SRC columns with high steel ratio. Furthermore, some suggestions were given on the design of SRC columns with high steel ratio.
赵宪忠, 杨笑天, 陈以一. 钢骨截面延展性对高含钢率SRC柱静力性能的影响研究[J]. 土木工程学报, 2016, 49(1): 31-41.
Zhao Xianzhong, Yang Xiaotian, Chen Yiyi. Effect of shape distribution of encased steel section on static performance of steel reinforced concrete columns with high steel ratio. 土木工程学报, 2016, 49(1): 31-41.
