MODIFIED H-D MODEL : A NEW SMOOTH-CURVE HYSTERESIS MODEL OF LAMINATED RUBBER BEARINGS FOR BASE ISOLATION

Abstract

A new smooth-curve hysteresis model for laminated rubber bearings, named 'Modified HD model' is proposed. Its simple formulation can be easily applied to both lead-plugged rubber bearings and high-damping rubber bearings, employing the parameters in widely-used modified bi-linear models. The hysteresis loops by the modified HD models have good agreement with those by loading test of laminated rubber bearings. The results of earthquake response analyses for a tall base-isolated building using the modified HD model are compared with those using modified bi-linear model.