Dynamic responses of concrete-filled steel tubular member under axial compression considering creep effect

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Jiang, X.T.^1 ; Wang, Y.D.^1 ; Dai, C.H.^1 ; Ding, M.^1

College of Water Resources and Civil Engineering, China Agricultural University, Beijing

100083, China^1

关键词: Concrete elastic modulus;    Concrete-filled steel tubular;    Kinematic hardening model;    Material non-linearity;    Plastic-damage models;    Scientific basis;    Stress and strain;    Von Mises yield criterion;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012126/pdf
DOI  :  10.1088/1755-1315/81/1/012126

来源: IOP

【 摘 要 】

The finite element model of concrete-filled steel tubular member was established by the numerical analysis software considering material nonlinearity to analyze concrete creep effect on the dynamic responses of the member under axial compression and lateral impact. In the model, the constitutive model of core concrete is the plastic damage model, that of steel is the Von Mises yield criterion and kinematic hardening model, and the creep effect at different ages is equivalent to the change of concrete elastic modulus. Then the dynamic responses of concrete-filled steel tubular member considering creep effects was simulated, and the effects of creep on contact time, impact load, deflection, stress and strain were discussed. The fruits provide a scientific basis for the design of the impact resistance of concrete filled steel tubular members.