Estimation Method of Loss Coefficient for Wind-Induced Internal Pressure Fluctuations

AbstractAs the importance of wind-induced internal pressure for building safety has continually been highlighted, increasing attentions have been paid to numerical methods for estimating fluctuating internal pressures, leading to the emergence of numerous second order nonlinear governing equations with two ill-defined parameters, namely inertial coefficient (CI) and loss coefficient (CL). Because resonance frequency and damping ratio of fluctuating internal pressures are susceptible to the values of inertial and loss coefficients, respectively, a correct understanding, and reasonable estimates, of these two parameters are required before using the governing equations to predict internal pressure responses. Compared with the inertial coefficient, which can be easily obtained from the Helmholtz frequency, a wider range of values of loss coefficient is in use, therefore this study focuses on the more uncertain parameter CL and presents an alternative method to identify loss coefficients of measured internal ...