| Title |
An Experimental Study on the Deformation and Strength of Square and Tubular Steel Column under High Axial Force. |
| Abstract |
Square and circular steel tubes used to column member, have an advantage to structure design without difference between strong axis and weak axis, compared to opensection members(H-section) in section proprities. Especially these members have better effective properities in deformation than H-section, not having direction in strong axis and weak axis because of isotropic buckling.This paper represents the investigation to study the deformation and strength of square and circular steel column throughout a series of experiment with the key variables, such as selenderness, diameter-to-thickness(D/t) ratio and eccentric ratio. Through the experiments, the results show that the ratio of stress increment isdecreased in accordance with increment of D/t ratioand the limit value of D/t ratio over yield stress is presented to D/t<=36.7. The limit value of D/t ratio over plastic deformation(3-4)is presented to D/t<35 respectively, also an emprical formula to predict the ultimate capacity of steel column is proposed. |