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Indexed by:期刊论文

Date of Publication:2016-10-01

Journal:JOURNAL OF ENGINEERING MECHANICS

Included Journals:SCIE、Scopus

Volume:142

Issue:10

ISSN No.:0733-9399

Key Words:Wind pressure; Non-Gaussian process; Inverse Johnson transformation; Numerical simulation; Peak factor

Abstract:A hybrid data and simulation-based (HDSB) approach that incorporates simulated data based on an autoregression (AR) model and an inverse Johnson transformation for estimating wind pressure extremes is introduced. With the target statistical characteristics, i.e., probability density function (PDF) and power spectra density (PSD) in hand, massive simulations of non-Gaussian wind pressure can be carried out, which provides the peak factors or any desired fractile levels for design applications. Existing methods concerning the peak factors of wind pressure are briefly reviewed, and the fundamental basis and the simulation procedure of the HDSB approach are presented. The invocation of the inverse Johnson transformation in the HDSB approach enhances its applicability to the entire Pearson diagram, i.e., for all the softening and hardening stationary non-Gaussian processes with any combination of skewness and kurtosis. The efficacy of the HDSB approach in comparison with existing methods is demonstrated and verified by comparing the numerically simulated results with the directly observed data in long-duration wind tunnel tests, and with results from previous methods. The computational demand of the HDSB approach is favorable when compared to long-duration wind tunnel tests or model driven approaches. The proposed HDSB approach can serve as a building block for the development of a data-driven framework for efficiently simulating stationary non-Gaussian processes and estimating the extremes accurately. (C) 2016 American Society of Civil Engineers.