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Modeling of Nonstationary Winds and Its Applications
Publisher: American Society of Civil Engineers
Abstract: A model is proposed to represent nonstationary fluctuating winds based on the concept of instantaneous power spectrum representation and amplitude modulation to model the fluctuating winds with time-varying mean wind speed. ...
Strength of Slender Reinforced Concrete Columns under Biaxial Bending
Publisher: American Society of Civil Engineers
Abstract: A simple approach is proposed in this paper for estimating the strength of a slender reinforced concrete column under biaxial bending and axial load. The model considers the nonlinear stress-strain relations of concrete ...
Simple Approximations for Improving Second-Order Reliability Estimates
Publisher: American Society of Civil Engineers
Abstract: Simple correction factors are given for improving the second-order reliability estimates. The correction factors are applied to Hohenbichler and Rackwitz's formula. The factors are obtained based on the main curvature of ...
Assessment of Reliability of Aging Reinforced Concrete Structures
Publisher: American Society of Civil Engineers
Abstract: Aggressive environment and in-service loading can cause the resistance degradation of existing reinforced concrete structures. They must be considered for the safety evaluation and service-life prediction of deteriorating ...
Projecting Sets of Ground-Motion Models and Their Use to Evaluate Seismic Hazard and Uniform Hazard Spectrum for Mainland China
Publisher: ASCE
Abstract: A projection method was used to develop ground-motion models (GMMs) to predict the peak ground accelerations (PGAs) that are used to assess the fourth and fifth generations of Chinese seismic hazard maps. In the present ...
Modeling Nonstationary Non-Gaussian Hurricane Wind Velocity and Gust Factor
Publisher: ASCE
Abstract: This study estimated the wind gust factor and turbulence intensity for hurricane winds that are modeled as a nonstationary non-Gaussian process. The estimation considered the time-varying mean wind velocity, and the ...
Application of Dual-Tree Complex Wavelet Packet Transform for Generating Synthetic Multivariate Nonstationary Non-Gaussian Thunderstorm Wind Records
Publisher: ASCE
Abstract: The available thunderstorm wind records with subsecond sampling intervals is scarce for a given site; stochastic models that can be used to sample multivariate nonstationary non-Gaussian thunderstorm winds at multiple ...
Reliability Evaluation of Earth Slopes
Publisher: American Society of Civil Engineers
Abstract: The reliability analysis of earth slopes is considered. For slope safety assessment, the first-order reliability method is employed for estimating the probability of failure or reliability index. Since the failure of any ...
Optimal Seismic Design Considering Risk Attitude, Societal Tolerable Risk Level, and Life Quality Criterion
Publisher: American Society of Civil Engineers
Abstract: The minimum expected life-cycle cost decision rule leads to an optimal design for a risk-neutral decision maker, but fails to incorporate the magnitude of uncertainty in the life-cycle cost and is incapable of coping with ...
Statistical Analyses of Strength of Slender RC Columns
Publisher: American Society of Civil Engineers
Abstract: Probabilistic analyses of the modeling errors of several selected strength prediction models for slender reinforced concrete (RC) columns are carried out. The selected strength models include the moment magnifier methods ...