弾塑性ダンパーの剛性・降伏力・塑性率の調節による制振構造の応答制御手法

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This paper discusses simplified theories on seismic peak response evaluation and preliminary design of elasto-plastically damped building. The theories are based on the single-degree-of-freedom (SDOF) idealization of multistory building structure, and produce the so-called "control performance curve" expressing the seismic performance as a function of stiffness parameter, ductility demands, and response spectrum. The curve is used to find desirable stiffness balance between damper and other elements of the SDOF model. A rule to convert the SDOF design to multistory design, with a consideration to distribute damper stiffness over the building height, is also presented. Accuracy of proposed design approach is demonstrated via numerous time history simulations of a wide range of multiple-degrees-of-freedom (MDOF) models.
2005-09-30