Finite Element Modelling Approach for Wall with Various Support Conditions
In the past reinforced concrete walls were considered as non-load bearing and as such limited research was done on these elements. Due to the recent popularity of tilt-up construction and concrete cores in tall buildings reinforced concrete walls have become just as important structural element as beams, slabs and columns. The previous AS3600-2001 and current American concrete code (ACI318-2008) wall design equations are intended for load bearing walls supported at top and bottom only. Those code provisions do not directly include the effects of side restraints on the load carrying capacity. The recently released AS3600-2009 code guidelines for simplified wall design allow for increased capacity due to side restraints. More specifically, the code recognises wall panels in two-way action, supported laterally on three and four sides. In view of this, the authors have under taken extensive investigations on the applicability of more reliable and accurate wall design methods. The finite element method (FEM) is used to conduct a comparative study with existing experimental test results. The study focuses on the effect of various support conditions. Numerical results are also compared with those obtained using the empirical methods including those predicted by ACI 318-08 and AS3600-2009 recommendations.
The 2011 World Congress on Advances in Structural Engineering and Mechanics