Experimental study and FEM analysis of CFRP confined concrete columns
The behavior of CFRP confined concrete column under axial compressive force and the longitudinal constraint mechanism of specimen on different CFRP wrapped ways were studied by tests of three CFRP confined concrete columns and one reference concrete column and by three-dimensional nonlinear FEM (finite element method) analysis. The result indicated that when the axial compressive stress is large than 0.8～0.9 times of peak stress, the lateral expansion deformation of concrete increases rapidly. The longitudinal strain-circumferential strain relationship curve is finally in linear convergence. There exists strain concentration of the strap wrapped specimens in the place where no CFRP is wrapped. Based on the distribution of the lateral tensile strains εf along the longitudinal axis at different relative stress levels of CFRP confined concrete columns, the whole procedure of axially loaded experiment of specimens can be divided into three phases: elastic stage, elastoplastic stage, and plastic stage.
Lin-chun Wei Ren-an Luo Jing Ni Ping Zheng
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, China Shanghai University, Department of Civil Engineering, Shanghai 200072, China
国际会议
The 5th International Conference on Nonlinear Mechanics(第五届国际非线性力学会议)
上海
英文
864-869
2007-06-11（万方平台首次上网日期，不代表论文的发表时间）