Analysis of Tall Buildings Using A “Moment-Force Transformation Method" As a Simplified Method of Analysis

Abstract

This paper presents a simplified method of analysis, the moment-force transformation method (MFT), which is a modification of the moment transformation method (MT). In the MFT, the axial deformation in the vertical member is taken into account and the axial forces are transformed from one level to another level together with the transformed moments. With the consideration of the axial deformations in the vertical members, analysis of super-tall buildings, such as tube and outrigger buildings systems, becomes possible and accurate. The final output of the transformation procedure includes rotations and moments, from which shear forces in the vertical members and the lateral displacements are calculated. The axial displacements and axial forces in the vertical members are directly obtained. A number of problems were analyzed using the proposed method and the results obtained, were compared with known results and with those obtained using StaadPro2004 and ETABS. The comparison shows that, the results are in good agreement, thus verifying the accuracy of the developed method.