ANALYSIS OF DIFFERENT TYPES OF REINFORCED CONCRETE TUBULAR STRUCTURES

Abstract

An efficient and economical tall building cannot be designed without a thorough understanding of the significant factors affecting the selection of the structural system and knowledge of how the structural system will interrelate with architectural, mechanical and electrical aspects. Usually two to three different structural systems will be selected for comparison. 1.2 Tall Buildings as Lateral Load Resisting Systems As socio-economic trends demanded taller buildings, structural engineers were pressed to provide lateral load resisting systems that would minimize, (or at least optimize), cost of structural and reinforcing steel for buildings of greater height to width aspect ratios and varying vertical profiles. Initially, rigid frame construction was used extensively in tall buildings, but as aspect ratio increased, stiffness rather than strength criteria begins to control design and tall buildings pay a “premium for wind “, i.e. that amount of structural steel required beyond that required to sustain gravity loading. In order to control building response to lateral loading structural engineers may utilize one or more of the following: 1. Increase stiffness of the system 2. Increase building weight 3. Increase density of the structure with fill-ins 4. Use efficient shapes