Wind and Structures

Techno-Press (테크노프레스)
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Linearized analysis of the internal pressures for a two-compartment building with leakage

  • Yu, Xianfeng (State Key Laboratory of Subtropical Building Science, South China University of Technology) ;
  • Gu, Ming (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Xie, Zhuangning (State Key Laboratory of Subtropical Building Science, South China University of Technology)
  • Received : 2017.11.14
  • Accepted : 2018.12.13
  • Published : 2019.02.25
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Abstract

The non-linear equations governing wind-induced internal pressures for a two-compartment building with background leakage are linearized based on some reasonable assumptions. The explicit admittance functions for both building compartments are derived, and the equivalent damping coefficients of the coupling internal pressure system are iteratively obtained. The RMS values of the internal pressure coefficients calculated from the non-linear equations and linearized equations are compared. Results indicate that the linearized equations generally have good calculation precision when the porosity ratio is less than 20%. Parameters are analyzed on the explicit admittance functions. Results show that the peaks of the internal pressure in the compartment without an external opening (Compartment 2) are higher than that in the compartment with an external opening (Compartment 1) at lower Helmholtz frequency. By contrast, the resonance peak of the internal pressure in compartment 2 is lower than that in compartment 1 at higher Helmholtz frequencies.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, South China University of Technology

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