Abstract:
Pseudo-static experiments on the seismic behavior of 8 eccentrically constant-compressed steel box columns under cyclic lateral loading are conducted. The local stability and the seismic behavior of steel box columns in Hefei Xinqiao Airport Terminal under the action of an earthquake are investigated. Experimental results show that the steel box columns in Hefei Xinqiao Airport Terminal under the action of a frequent earthquake are in an elastic state, and the plate is steady. While the columns under the action of a rare earthquake are in an elastoplastic state, and the plastic deformation is found. The local stability of columns under the action of the rare earthquake is satisfied code demands. It is also found that the width-to-thickness ratio of a web plate has an obvious effect on the seismic behavior of the steel box columns. When the width-to-thickness ratio of the web plate increases, the area of the hysteresis loops tends to descend, and the load-bearing capacity and stiffness of the steel column degenerate severely. Finally, details of fabrication and suggestions of the aseismic design for steel box columns in large span structures are proposed.