EFFECT OF CONFIGURATION ON LATERAL DISPLACEMENT AND COST OF THE STRUCTURE FOR HIGH RISE STEEL SPACE FRAMES SUBJECTED TO WIND LOADS

J.Renuka, M. Pavan Kumar

Abstract: The choice of a cost effective lateral-force-resisting system for high-rise structures is challenging. There is no streamlined methodology to quantitatively compare the cost-effectiveness of each system beyond the more qualitative perception based evaluation of advantages or disadvantages. Developers currently base their decisions on architectural layout and structural integrity. Cost considerations are often primarily based on experience. This decision making process has three primary shortfalls. 1) It may not incorporate factors which greatly affect the economy of a particular framing system. 2) It may not allow engineers to carryout designs at the least cost. 3) Comparison of framing systems may not address the specific building types. This investigation proposes a prototype cost-effective model for selecting either a skeleton framing system or skeleton frame with bracing system for steel structural frames. A model for selecting cost-effective skeleton framing system or skeleton frame with bracing system will be a valuable tool for all decision makers. Engineers, in particular, will be able to select optimal steel framing faster, thus reducing design time and iterations. Furthermore, selection of economic framing system will also result in direct cost savings for steel structural frames. The study involves the design and cost estimation of steel frames representing skeleton framing system and skeleton frame with bracingsystem. The cost effectiveness of the framing systems are compared based on lateral displacement requirements and cost.The preferred framing system should meet lateral displacement requirements and is lower in cost. The results of this pilot study showed that the Skelton framing system with bracing is the cost-effective choice for 30storeys steel space frames at wind speeds of 55m/sec, 50m/sec and 47m/sec.

Keywords: Bracings, SFS (Skeleton framing system), SFWB (Skeleton frame with bracing system) etc…

DOI: https://doi.org/10.15623/ijret.2015.0401019