Evaluation of Approximate Analysis Methods for the Design of High-Rise Reinforced Concrete Framed Tube Buildings

Abstract

This research describes, manual calculation methods to analyze and design 2-dimensional reinforced concrete frames as part of forty story framed tube building. The building is composed of reinforced concrete walls, slabs, beams, and columns. It was analyzed under various load cases, the loads such as gravity loads, (dead and live loads) and lateral loads, (wind loads) were calculated. Linear elastic analysis was carried out using moment distribution and cantilever methods as manual approximate methods, and an analysis was done using computer program (ETABSv9.5.0). Moreover, the results of the 2-dimensional frame analysis program and manual calculations are included in the comparative study. The models are prepared as bare frame and shear wall. Some design requirements such as common assumptions for the structural analysis of tall buildings and sway limitations are discussed. The behavior of some structural systems for tall buildings subjected to horizontal forces is then considered, and one frame and shear wall were designed. The design strength was also checked for all members and it was determined that the members were adequate. Comparison included wind loads per story level and analysis results of bare frame such as shear forces, bending moments and axial forces were also considered. These results are displayed on tables. Based on comparison results, manual approximate methods are more conservative methods comparing with ) ETABS( program.