Effect of Columns Stiffness's and Number of Floors on the Accuracy of the Tributary Area Method
The using of finite element programs in analyzing and designing buildings are becoming very popular, but there are many engineers still using the tributary area method (TAM) in designing the structural members such as columns. This study is an attempt to investigate the accuracy of the TAM results with different load condition (gravity and lateral load), different floors numbers, and different columns stiffness's. To conduct this study, linear elastic analysis in ETABS program is used. The results from finite element method are compared to those obtained from TAM. According to the analysis of the data obtained, it can be seen that there is significance difference between the real load carried by columns and the load which is calculated by using the TAM. Thus, using 3-D models are the best choice to calculate the real load effected on columns and design these columns according to this load.
 A. Nilson, D. Darwin, and C. Dolan, 'Design of Concrete Structures', Fourteenth Edition, Mc Graw Hill, (2010).
 R.C. Hibbeler, 'Structural Analysis', Seventh Edition, Prentice Hall, (2009).
 Paul, 'Transfer Floor Design Strategy Using R/C Building Software', INDUCTA Engineering, (2006).
 O. Kurce, A. Lulec, 'A Comparative Study On Different Analysis Approaches For Estimating The Axial Loads On Columns And Structural Walls At The Tall Buildings', The Structural Design of Tall and Special Building Journal, Vol.22, (2013).
 I. Alqasem, and M.Abdulwahid, 'Comparison of calculation of axial loads on columns by tributary area method and 3D modeling by SAP2000', International Journal of Civil and Structural Engineering, Vol.3, 336-345pp., (2012).
 Computers and Structures CSI, Inc., Berkeley, California, USA, 'ETABS V 16.2.0, Integrated Building Design Software', (2017).
 ACI 318, Building Code Requirements for Structural Concrete (ACI 318m-14): An ACI Standard: Commentary on Building Code Requirements for Structural Concrete (ACI 318m-14) (Farmington Hills, MI: American Concrete Institute, 2014).
 Bungale. S. Taranath, 'Reinforced Concrete Design of Tall Buildings', CRC Press, (2010).
 I. Alqasem, M. Dwaikat, and M.Abdulwahid, ' The Effect of Number of Storey's and Columns Dimensions on the Accuracy of Tributary Area Method', Journal of Engineering science and Technology Review, Vol.7, 60-64pp., (2014).