Proximity effects between two plus-plan shaped high-rise buildings on mean and RMS pressure coefficients

Abstract

Wind-induced interference effects may result in a substantial increase or reduction in the wind forces on the buildings constructed in groups due to modifying wind flow around, according to the shape and relative position of the buildings. Experimental study of wind-generated proximity effects on mean and root mean square (RMS) pressure coefficients between two tall buildings are investigated in detail for various interference conditions in this study. The Interference effects on mean and RMS pressure coefficients are presented as interference factors, i.e., mean interference factor (MIF) and RMS interference factor (RIF). Results show that the interference effects on local wind pressure are significantly higher on the windward side's faces near the recessed corner. The full blockage condition generates suction on walls facing the gap. The half blockage and no blockage conditions create a more severe interference effect than the full blockage. The maximum value of MIF is 4, 9 and 13 in full, half, and no blockage condition, respectively. Interference effects result in reduced wind load on side faces and faces at the leeward side. Suction at side faces reduced approximately by 65% in full blockage condition. RIF's values less than unity are observed for all interference cases.

CFD Investigation of Aerodynamic Effects on Multi-span Low-rise Structures with Curved Canopy Roofs of Different Apex Height

“…Mathematically, it can be given as, (5) where, p is the fluid"s pressure, V is its velocity, ρ is its density, g is gravity"s acceleration and z is its vertical height above a datum level.…”

“…This one-way coupled technique allowed them to effectively evaluate the effect of wind on these structures. [5] focused on analysing the wind-induced interference effects under various conditions and aimed to provide a detailed understanding of how wind behaviour is affected by the presence of other tall buildings. [6] focused on understanding the effects of random, chaotic fluctuations in the wind speed as well as the direction on the behaviour of tall buildings when exposed to extreme winds.…”

Numerical Study of Wind Loads on Y Plan-Shaped Tall Building Using CFD

“…[22] studied the wind effect on setback building model and observed that the model with setback on both sides is more vulnerable than the model with setback on single side. Nagar et al (2021) [23] studied experimentally the proximity effects between two plus-plan shaped high-rise buildings. Raj et al (2020) [24] numerically investigate wind action on "H" plan shaped tall buildings.…”

Wind Excited Action around Tall Building Having Different Corner Configurations

“…According to the literature, modifying the shape of an entrant's corner by roughly 10% of the building width can reduce wind effects on high-rise buildings. Some researchers also evaluated the effect of interference of principal building models; for example, Pal et al [22] estimated drag and lift force coefficients on interfering square and fish plan shape models; Nagar et al [16] have studied interference effects on "H" and square model; Pal and Raj [23] evaluated the full blockage condition for various plan shapes of tall building models; Pal et al [24] studied interference effect of twin building models on square plan shape and remodelled triangle shape model; Nagar et al [25] studied interference effect on two "+" shape models. Few important outcomes of interfering studies are as follows: pressure distribution is symmetric for isolated building, and drag and lift force coefficient magnitude is based on the position and geometric shape of the neighbouring building model.…”