Experimental testing of a rocking timber shear wall with slip-friction connectors
Loo, Wei Yuen; Kun, Chern; Quenneville, Pierre; Chouw, Nawawi
Citation:Loo, W. Y., Kun, C., Quenneville, P., and Chouw, N. (2014). Experimental testing of a rocking timber shear wall with slip-friction connectors. Earthquake Engineering & Structural Dynamics, 43(11), pp.1621-1639. doi:10.1002/eqe.2413 NOTE: available from link below.
Permanent link to Research Bank record:http://hdl.handle.net/10652/2902
Allowing a structure to uplift and rock during an earthquake is one way in which activated forces can be capped and damage to the structure avoided or minimised. Slip-friction connectors (also known as slotted-bolt connectors) were originally developed for use in steel construction, but for this research have been adapted for use as hold-downs in an experimental 2.4m 2.4m rigid timber shear wall. A novel approach is used to achieve the desired sliding threshold in the connectors, and the wall uplifts when this threshold is reached. From a series of quasi-static cyclic tests, it is shown that slip-friction connectors can impart ductile and elasto-plastic characteristics to what would otherwise be essentially brittle structures. Because forces on the wall were capped by the slip-friction connectors to levels well below the design level, no damage to the wall was observed. Self-centring potential was also found to be excellent. The slip-friction connectors themselves are of a unique design and have proven to be robust and durable, adequately performing their duty even after almost 14 m of cumulative travel under high contact pressures. To resist base shear without unduly affecting rocking behaviour, a new type of shear-key is proposed and implemented, and a procedure developed to quantify its influence on overall wall behaviou