抄録
Dynamic response analysis of a single-story braced frame was conducted to demonstrate the ability of the mathematical expression of hysteretic behavior of single braces proposed in the previous paper to simulate the dynamic behavior of the frame. The restoring force of the system was represented as a sum of the restoring forces of the bare frame and of the braces. The hysteretic behavior of the bare frame was taken to be bi-linear. The behavior of the braces was estimated by two methods. In the first method, the proposed function was used to represent the restoring force of the braces. The axial force of the braces was expressed as a single-valued continuous function with respect to the axial displacement until unloading occured. Upon unloading, the characteristic parameters were modified. In the second method, the restoring force of the braces was computed by a sophisticated numerical analysis. The frame was analyzed as an undamped one-degree-of-freedom system having piecewise-linear hysteretic characteristics. The important findings are as follows ; (1) Dynamic characteristics of the braced frame depended not only on the brace slenderness but also on the strength ratio of the frame to the braces. (2) The results of response analysis using the proposed hystresis function agreed well with the numerical solution. The proposed function can be used appropriately for the dynamic analysis.
