Data-driven structural assessment of variable-inclination diagrid systems under lateral loading

¹ Department of Civil Engineering, Dayananda Sagar College of Engineering, Bengaluru, 560111 Karnataka, India.
² Department of Civil Engineering, The Oxford College of Engineering, Bengaluru, 560068 Karnataka, India.
³ Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

Technological advancements, changes in people’s lifestyles, and the needs of the current population have all contributed to the construction of tall structures. Current trends indicate that the geometrical configuration of the diagrid structural system to be used for high-rise buildings provides aesthetic potential and structural efficiency. Buildings in seismically active places must be constructed with consideration for their lateral stability during severe earthquakes. Many lateral load resisting systems are classified as interior and exterior structures, such as diagrid, hexa-grid or mega frame systems, which are provided at the outer periphery of buildings they come under exterior structures. Normal bracing systems will be uneconomical if the number of storeys is more than 25; hence, a new grid system has been developed, i.e. the diagrid system. Compared to other methods, diagrids are aesthetically more pleasant and provide better rigidity to structures. Here, analysis of a normal framing system without any load resisting system, diagrids with different diagonal angles and a conventional system will be conducted by using analysis and design software, Extended Three-Dimensional analysis of building systems (ETABS V22.5.0). A typical square floor layout of 36mx36m is considered, and all structural parts are developed according to IS 456-2000. Wind and earthquake parameters are considered from IS875-2015 (part III) and IS1893-2016, respectively. The analytical results are contrasted in terms of base shear, storey drift, time history, and storey displacement.