DIAGRID STRUCTURAL SYSTEM: STRATEGIES TO REDUCE LATERAL FORCES ON HIGH-RISE BUILDINGS

Abstract

The evolution of tall building structural systems based on new structural concepts with newly adopted high strength materials and construction methods have been towards “stiffness” and “lightness”. Structural systems are become “lighter” and “stiffer”. It is common knowledge that rather than directly standing the forces, it is better to reduce them and dissipate the magnitude of vibrations. Structure design of high rise buildings is governed by lateral loads due to wind or earthquake. Lateral load resistance of structure is provided by interior structural system or exterior structural system. The selected structural system should be such that it should be effectively utilized for structural requirements. Recently diagrid structural system is adopted in tall buildings due to its structural efficiency and flexibility in architectural planning. Diagrid structure consists of inclined columns on the exterior surface of buildings compared to closely space vertical columns in framed tubes. The lateral loads are resisted by axial action of the diagonal. In this paper, the comparison study of 20-storey simple frame building and diagrid structural system building is presented here. The comparison of analysis of results in terms of top storey displacement, storey drift, steel and concrete consumption is presented here.