Abstract
Tests were carried out on a brake lining damper intended to dissipate energy between parts of a structure having relative motion during earthquake attack. The device operates by the sliding of a steel plate clamped against a brake lining. Hysteresis loops for the damper showed peaks for the breakaway friction force, when the value of the force was up to twice that obtained for continuous movement. Also values of the coefficient of friction derived from the test were lower than those quoted elsewhere. Further testing is required prior to the use of the method in structures.
Highlights
The use of brake linings, clamped against a sliding plate to absorb energy between parts of a structure having relative motion during earthquakes, has been the subject of research by workers throughout the world with the object of providing in-plane damping for the panels of building structures
The hysteresis loops for 20 continuous cycles show up to a 20% loss in frictional force between cycle 1 and cycle 20, presumably due to wear of the linings
Further investigation is required in an endeavour to eliminate the peaky nature of the force/ displacement loops obtained in the tests and to confirm the values for the coefficient of friction at various speeds and for sinusoidal testing
Summary
The use of brake linings, clamped against a sliding plate to absorb energy between parts of a structure having relative motion during earthquakes, has been the subject of research by workers throughout the world with the object of providing in-plane damping for the panels of building structures. The work described in this paper was commissioned by the Ministry of Works and Development with a view to determining load/deformation characteristics under cyclic loading
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