@article {bnh-5159, title = {Analytical modelling of podium interference on tower walls in buildings}, journal = {Australian Journal of Structural Engineering}, volume = {18}, year = {2017}, month = {11/2017}, abstract = {

In regions of low-to-moderate seismicity like Australia, a common form of building construction is the one featuring a podium structure that supports a tower with smaller floor plan. This building layout is particularly favoured in metropolitan regions as it can cater for a mix of commercial and residential functionalities. This paper investigates the undesirable effects of podium interferences on the shear demands on the structural walls at and above the interface zone. Shear force redistributions between the connected structural walls were found to be the direct consequence of the differential restraints imposed by the podium structure. The generation of in-plane strutting forces in the slabs and beams connecting the structural walls was also found to be proportional to the extent of the deformation incompatibility between the walls and columns above the podium level. An analytical model is proposed herein for estimating in-plane strutting forces in the connecting slabs (or beams). The model has been verified against results obtained from finite element analyses using 2D, and 3D, sub-assemblages of the building. Deficiencies in the conventional diaphragm modelling approaches have been highlighted, and optimal solutions are proposed.

}, doi = {https://doi.org/10.1080/13287982.2017.1396870}, url = {https://www.tandfonline.com/doi/abs/10.1080/13287982.2017.1396870?journalCode=tsen20}, author = {Mehair Yacoubian and Nelson Lam and Elisa Lumantarna and John Wilson} } @article {bnh-5158, title = {Effects of podium interference on shear force distributions in tower walls supporting tall buildings}, journal = {Engineering Structures}, volume = {148}, year = {2017}, month = {10/2017}, abstract = {

High rise constructions featuring a podium surrounding tower walls are often favoured for the versatile functionality of the building. It is shown in this paper that the podium can impose significant differential restraint on coupled tower walls. Incompatible tower wall displacements under lateral loads were found to be the main contributor to the generation of in-plane strutting forces in floors above and below the podium-tower interface level. Shear force localisations in the interior tower wall immediately above the interface was found to be the direct consequence of these actions. Key parameters contributing to this detrimental shear force localisation in a tower wall were analysed by way of parameter studies on representative models of the building and sub-assemblages. It is revealed that the in-plane rigid diaphragm assumption commonly adopted in practice can significantly suppress compatibility forces generated within the building floor leading to unconservative design of the tower walls. Elaborate nonlinear model has been examined to showcase the consequences of understating the shear demands on these walls.

}, doi = {https://doi.org/10.1016/j.engstruct.2017.06.075}, url = {https://www.sciencedirect.com/science/article/pii/S0141029616305454?via\%3Dihub}, author = {Mehair Yacoubian and Nelson Lam and Elisa Lumantarna and John Wilson} }