Seismic Performance Of Insulated Sandwich Wall Panel (ISWP) Under In-plane Lateral Cyclic Loading

This research summarises the seismic performance of insulated sandwich wall panels (ISWP) under lateral cyclic loading. Experimental work was carried out to determine the lateral strength capacity, hysteresis loops (load versus displacement), stiffness, ductility and equivalent viscous damping of ISWP. A specimen of ISWP was tested under in-plane quasi-static lateral cyclic loading starting with a small percentage of ±0.01% drift and was increased gradually by 0.1% drift until the maximum strength capacity was achieved. The in-plane ultimate lateral strength recorded for ISWP was 5.6 kN at ±1.8% drift. Visual observation showed that the cracks were started to occur at the wall- foundation joint during pushing direction of +0.3% drift and uplift the bottom corner of the ISWP wall. However, the specimen did not have any defect or cracks on the surface of wall but only buckling at the aluminium channel. Even though, there were some failure occurred at connections betweeen wall-foundation interface but this wall panel did not suffer any structural damage or cracks due to the protection given by the aluminium frame along the edge of the ISWP wall.