Spectral characteristics and dynamic response of wind induced internal pressure in buildings with openings: A CFD-based investigation
Xiangqiu Fu,Nan Jin,Xichen Zhang,Yuan Cao,Siyuan Ma
Abstract
Under building opening conditions, wind-induced internal pressure may significantly alter the structural
behavior of the building envelope. This study investigates the dynamic characteristics and response patterns of wind
induced internal pressure through transient CFD simulations, proposing a computational method for quantifying
Helmholtz resonance frequency in buildings with openings. The influence of opening size, quantity, and location on
dynamic characteristics and wind load responses was systematically examined. Key findings reveal: 1) The proposed
method effectively predicts Helmholtz resonance frequencies, demonstrating consistent trends with theoretical models;
2) The Helmholtz frequency exhibits strong linear correlation with opening area—larger openings increase Helmholtz
frequencies while reducing damping ratios, with leeward openings substantially diminishing damping ratios; 3)
Changes in indoor and outdoor pressures often exhibit an opposite trend to the net pressure, while an increase in the
damping ratio typically leads to higher internal pressure. These results provide critical theoretical support for
determining wind loads on openable curtain wall panels and roof penetrations in architectural engineering.
Key Words
building wind engineering; CFD; Helmholtz resonance; wind-induced internal pressure
Address
Xiangqiu Fu — 1)Shenzhen Technology Institute of Urban Public Safety, Key Laboratory of Urban Safety Risk Monitoring and Early Warning, Ministry of Emergency Management, Shenzhen, Guangdong, 518023, China 2)State Key Laboratory of Building Safety and Built Environment, China Academy of Building Research, Beijing 100013, China
Nan Jin — 1)Shenzhen Technology Institute of Urban Public Safety, Key Laboratory of Urban Safety Risk Monitoring and Early Warning, Ministry of Emergency Management, Shenzhen, Guangdong, 518023, China 2) Shenzhen Key Laboratory of Urban Disasters Digital Twin, Shenzhen, Guangdong,518023, China
Xichen Zhang — Institute of Building Environment and Energy, China Academy of Building Research, Beijing 100013, China
Yuan Cao — State Key Laboratory of Building Safety and Built Environment, China Academy of Building Research, Beijing 100013, China
Siyuan Ma — State Key Laboratory of Building Safety and Built Environment, China Academy of Building Research, Beijing 100013, China
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