Comparative Analysis Of Steel Diagrid Building and conventional Building - A REVIEW

STRUCTURE

Throughout the world the multi-storey building construction has been increasing day by day. The development of highly advanced structural system which has the quality of aesthetic expression, structural efficiency and most importantly geometric versatility requires the design and construction of artificial infrastructure on the lines of bio-mimicking principles. Recently, the use of diagonal members for carrying the gravity and lateral load has increased and these members are known as ‘diagrid’. The unique geometrical configuration of the diagrid structural system has led them to be used for tall buildings providing structural efficiency and aesthetic potential. In this study, the structural response of conventional and diagrid building is investigated to evaluate the structural benefits of diagrid system. A regular G+15 storey steel building with a plan size of 18 m x 18 m, located in a seismic zone V is analysed and designed by STAAD Pro. Software. All structural members are designed as per Indian standard for general construction in steel (IS 800:2007) and the seismic forces are considered as per Indian codal provision for earthquake resistant design of structure (IS 1893 (Part 1): 2002). In diagrid structure, the major portion of lateral load is taken by the external diagonal members, which in turn releases the forces in other members of the structure. The use of diagrids significantly decreases the maximum shear force and bending moment in internal and perimeter beams. The diagrid configuration also provides a reduction in the span of perimeter beams at alternate floors, hence reducing the beam forces at alternate floors. The bending moment in internal column also decreases in diagrid building. This reduces the sectional requirement of beams and columns in diagrid building. An overall economy of nearly 12% is achieved in diagrid building compared to conventional building. The lateral displacement and storey displacement has been reduced significantly in the diagrid building compared to the conventional building. The maximum lateral displacement in diagrid building reduces by nearly 15% compared to conventional building.

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