Effect of Lap Gap on the Frictional Performance of Shear-Type Friction Damper
The shear-type friction damper using aluminum alloy as the friction material were designed and tested under cyclical loading to investigate the effect of the lap gap to the frictional performance. The test results indicated that the dampers with a lap gap could also absorb energy stably with the same hysteretic behavior as a general friction damper; the frictional force of the shear-type friction damper depended not only upon the bolts tension by the high-strength bolts that clamped the sliding steel plate but also strongly upon the scale of lap gap. The lap gap changed in a scale of 0.12mm only, the average sliding force has four times increase at a lower level of bolt tension, and a double effect to increasing sliding force at the higher level of bolt tension.
Hui Li, Yan Feng Liu, Ming Guo, Rui Zhang and Jing Du
P. B. Zhang et al., "Effect of Lap Gap on the Frictional Performance of Shear-Type Friction Damper", Advanced Materials Research, Vols. 374-377, pp. 2513-2519, 2012