Effect of relative intensity of wind load on the RC column reliability in tall buildings

Abstract

Wind loads are very important in the design of tall buildings as often the load combinations containing the wind load govern the design. As for reliability, however, because of the higher inherent uncertainty in the wind load in comparison to the gravity load, safety indices decrease as the ratio of wind load to gravity load increases. The safety indices in RC columns depend on the nominal wind to gravity load ratios. Due to the interaction between bending moment and axial force, a single ratio cannot be defi ned, because the eccentricity is not similar for wind and gravity loads. In this paper, the ratio of wind to gravity loads is considered separately for axial force and bending moments. Unlike conventional approach, here it is assumed that the wind and gravity loads' eccentricities are not equal, and the fi nal load eccentricity used in either the design or the reliability analysis is a function of applied loads. The results demonstrate that the sensitivity of RC columns' safety indices to bending moment ratios is higher than that of axial force ratios. Furthermore, the variation of RC columns' safety indices with a low rebar percentage is very different from RC columns with high rebar percentages.

Impact of wind loads on columns or the building's geometric center in high-rise and low-rise buildings

“…They learned that the pressure is spread evenly in cubes and cubes but not evenly on objects that are not flat. Using the LES turbulence model in CFD simulations, Germi and Kalehsar (2021) looked at the upstream and downstream interference effects for major and isolated rectangular buildings, and Baji and Ronagh (2012) presented the effect of the relative intensity of the wind load on the RC column reliability in tall buildings. Zhang et al (2014) Comparison of microburst-wind loads on low-rise structures of various geometric shapes.…”

Horizontal displacement at the top of the building with frame and shear walls structures according to TCVN 2737:2023

“…A prediction model and experimental study of the effect of wind speed on tall buildings using machine learning (Ahmed et al, 2023) and structural optimization of RC columns in a multistory building by tree columns subjected to lateral loads (Baji and Ronagh, 2012;Balaji et al, 2023) presented the effect of the relative intensity of the wind load on the RC column reliability in tall buildings. Columns are important for architectural structures.…”