Abstract
This paper investigates the role of accidental mass eccentricities on the inelastic torsional behaviour of multi-storey asymmetric buildings with a mixed type lateral load resisting system subjected to the Erzincan-1992 and Kobe-1995 ground motions. The numerical modelling results show that the effects of spatial variations of mass eccentricities are lower and smoother in the inelastic rather than the elastic state of deformation, but both the elastic and inelastic torsional response is pointing to the same optimum location of the key element for which the torsional response of the structure is minimized.
Highlights
The term “accidental mass eccentricity” originates from many uncertainties such as non-uniform mass and stiffness distributions, and possible rotational effects of the ground motion
The main objective of these studies was to determine the location of a vertical axis for which any in-plane applied lateral loading, the torsional distortion on the structure would be minimized. This axis constitutes an optimum torsion axis (OTA) and can be either determined using the approximate method of the continuous medium [13, 14], which defines the OTA as the vertical axis passing through the center of rigidity (m-CR) of an equivalent single story system, or alternatively, using the discrete element approach, which is familiar to practicing engineers [15]
This paper extends the analysis into the inelastic region by investigating the role of accidental mass eccentricities on the inelastic torsional response of 9-storey asymmetric buildings
Summary
The term “accidental mass eccentricity” originates from many uncertainties such as non-uniform mass and stiffness distributions, and possible rotational effects of the ground motion. The main objective of these studies was to determine the location of a vertical axis for which any in-plane applied lateral loading, the torsional distortion on the structure would be minimized This axis constitutes an optimum torsion axis (OTA) and can be either determined using the approximate method of the continuous medium [13, 14], which defines the OTA as the vertical axis passing through the center of rigidity (m-CR) of an equivalent (modal) single story system, or alternatively, using the discrete element approach (stiffness method), which is familiar to practicing engineers [15]. This paper extends the analysis into the inelastic region by investigating the role of accidental mass eccentricities on the inelastic torsional response of 9-storey asymmetric buildings
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
