456
I. Goł˛ ebiowska and M. Dutkiewicz
Fig. 2 Force-displacement hysteresis responses for a PA, and b PE based FP bearing [10]
Fig. 3 Variation in the coefficient of sliding friction with sliding velocity a temperature, and
b pressure at the sliding surface [11]
level, passive adaptive FP bearings have different hysteretic properties, the example
are: sliding isolators with multiple sliding surfaces (SIMSS) [15–17], sliding isolators with variable curvature (SIVC) [18–24], sliding isolators with variable friction
(SIVF) [25, 26].
Multi-concave FP bearings are characterized by high efficiency of vibration reduction. This is: double concave friction pendulum (DCFP) bearings, triple concave friction pendulum (TCFP) bearings, and quintuple concave friction pendulum (QCFP)
bearings.
Further modifications of FB are proposal of the Variable Friction Pendulum
System (VFPS) of Tsai et al. [26] and Shaikhzadeh and Karamoddin who described
Modified Variable Friction Pendulum System (m-VFPS) [27, 28]. Comparison of
friction coefficients due to isolator displacements is presented in Fig. 4.
I. Goł˛ ebiowska and M. Dutkiewicz
Fig. 2 Force-displacement hysteresis responses for a PA, and b PE based FP bearing [10]
Fig. 3 Variation in the coefficient of sliding friction with sliding velocity a temperature, and
b pressure at the sliding surface [11]
level, passive adaptive FP bearings have different hysteretic properties, the example
are: sliding isolators with multiple sliding surfaces (SIMSS) [15–17], sliding isolators with variable curvature (SIVC) [18–24], sliding isolators with variable friction
(SIVF) [25, 26].
Multi-concave FP bearings are characterized by high efficiency of vibration reduction. This is: double concave friction pendulum (DCFP) bearings, triple concave friction pendulum (TCFP) bearings, and quintuple concave friction pendulum (QCFP)
bearings.
Further modifications of FB are proposal of the Variable Friction Pendulum
System (VFPS) of Tsai et al. [26] and Shaikhzadeh and Karamoddin who described
Modified Variable Friction Pendulum System (m-VFPS) [27, 28]. Comparison of
friction coefficients due to isolator displacements is presented in Fig. 4.