System Overstrength Factor Induced by Interaction between Structural Reinforced Concrete Walls, Floors and Gravity Frames-Analytical Formulation (2022)
In multi-storey structural wall buildings, the structural walls are required to resist additional shear force due to their interactions with the floors and gravity-resisting system, which is not fully catered for in current seismic design provisions and assessment guidelines. This paper scrutinizes the mechanics of the interaction between structural reinforced concrete (RC) structural walls, floors and gravity frames in multi-storey RC structural wall buildings during elastic and nonlinear response phases. It also investigates the implications of this interaction on design of multi-story RC wall buildings. Generic expressions are derived to predict the drift and rotation profiles of multi-storey RC wall buildings. Then, a simple hand calculation method is developed to estimate the system (moment) overstrength of multi-storey RC wall buildings due to system (wall-floor-frames) interaction. The proposed method is applied to a prototype building with different slab dimensions and stiffness, and verified by comparing with the system overstrength factor obtained using finite element analysis. The simplified method estimates, and the nonlinear finite element analyses results agree, that a system overstrength factor of 1.7 can be used to account for the 3D interaction between the structural walls, floors and gravity frames in design and assessment of typical ductile RC wall buildings.
CitationSedgh RE, Dhakal R, Lee C-L, Carr A (2022). System Overstrength Factor Induced by Interaction between Structural Reinforced Concrete Walls, Floors and Gravity Frames-Analytical Formulation. Bulletin- New Zealand Society for Earthquake Engineering.
This citation is automatically generated and may be unreliable. Use as a guide only.
ANZSRC Fields of Research40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
40 - Engineering::4005 - Civil engineering::400510 - Structural engineering
RightsAll rights reserved unless otherwise stated
Showing items related by title, author, creator and subject.
Experimental Investigation on the Interaction of Reinforced Concrete Frames with Precast-Prestressed Concrete Floor Systems Peng, B.H.H.; Dhakal, Rajesh; Fenwick, R.C.; Carr, A.J.; Bull, D.K. (University of Canterbury. Civil and Natural Resources Engineering, 2008)A three dimensional, approximately half scale experimental test has been carried out to investigate the effect of precast-prestressed floor units on the seismic performance of reinforced concrete moment resisting frames. ...
Peng, B.H.H.; Dhakal, Rajesh; Fenwick, R.C.; Carr, A.J.; Bull, D.K. (University of Canterbury. Civil and Natural Resources Engineering, 2008)Elongation in reinforced concrete members can have detrimental effect on the seismic performance of reinforced concrete structures. For reliable assessment of seismic performance, analytical models should take into account ...
Niroomandi A; Dhakal, Rajesh; Pampanin, Stefano; Soleymani Ashtiani M (Concrete NZ, 2019)One of the failure modes that got the attention of researchers in the 2011 February New Zealand earthquake was the collapse of a key supporting structural wall of Grand Chancellor Hotel in Christchurch which failed in a ...