Economic Effects of Beam Spans, Number Of Stories and Soil Type on Special Steel Moment Resisting Frames with X-Bracings

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Author(s) Mehdi Babaei | S. Said Mousavi
Pages 420-426
Volume 4
Issue 9
Date September, 2015
Keywords X-Bracing, Optimization, Weight, Special Ductility Level, Steel Moment Resisting Frame.

Building structures in many places of the world are under earthquake forces, as they are in Iran. The most common method of controlling drift and displacement is to use steel braces or reinforced concrete shear walls that run on many different forms and configurations. Braced systems are generally of centric (CBF) or eccentric (EBF), depending on the shape and behavior of the system. Design of the cost-effective building systems and finding the best layout for braces and columns are the main significance of this study. For this purpose, different structural models with different number of spans, stories, and soil types are modeled and investigated. Special steel moment resisting frame structures with X bracings containing 5, 10 and 14 floors and spans of 5.6, 7.5 and 11.2 meters and soil type of II and III, according to the Iranian regulations, have been designed, and estimated. The results are presented by graphs and compared. The span of 7.5m in buildings with 5, 10 and 14 stories is obtained as optimal in the soil type I, while span of 5.6 is obtained optimal in the soil type III for 14-storey buildings.

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