|Title||Non-ductile seismic performance of reinforced concrete walls in Australia|
|Publication Type||Conference Paper|
|Year of Publication||2016|
|Authors||Hoult, RD, Goldsworthy, HM, Lumantarna, E|
|Conference Name||Australasian Structural Engineering Conference 2016|
|Conference Location||Brisbane, Australia|
Much of the Australian building stock comprises of reinforced concrete (RC) buildings that rely on RC walls or cores as their lateral load resisting system. Past research on the seismic behaviour of RC walls has primarily concentrated on highly reinforced and confined sections. However, there is a paucity of research focusing on lightly reinforced and unconfined sections that are commonly found in regions of low to moderate seismicity such as Australia. Moreover, some lightly reinforced concrete walls have been observed to perform poorly in recent earthquake events, with a single crack forming at the base within the plastic hinge region in contrast to the expected distributed cracks. This paper reports on an investigation into the seismic performance of rectangular walls with typical detailing and design parameters found in Australia. A simple model that can be used to predict the required amount of longitudinal reinforcement for the onset of secondary cracking is introduced. Finite element modelling results emphasise that a minimum amount of longitudinal reinforcement is required for secondary cracking to occur. Ultimately this will be useful for deriving a plastic hinge length that can be used for displacement capacity calculations of lightly reinforced walls.