Multi-dimensional Non-linear Response of Steel Frame Structures under MultidimensionalGround Motions

摘要

This paper discusses multi-dimensional non-linear responses of steel frame structures where multi-dimensionalground motions are applied. A steel frame structure with large span truss-type beams is modeled, and artificial groundaccelerations with numerically clear characteristics are applied.Multi-dimensional non-linear response analyses are used for this study, where a combined stress condition of thestructure is available. As the first step of multi-dimensional study, both model and applied ground motions are restricted tobe two-dimensional (2-D), where one horizontal direction and a vertical direction are considered.Purposes of this study are the followings. Firstly, clarify the non-linear behavior of the steel frame structure undermulti-dimensional ground motions. And secondly, study relations between the phase angle of the input motion and nonlinearresponses of structures.