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Displaying 76 - 100 of 109

Meteorological Extremes

July 1, 2002
Author(s)
Emil Simiu
This entry discusses briefly basic principles of extreme value (EV) estimation (see Extreme value analysis), the role of simulations for the development of relevant meteorological data sets, the interaction between the practical application of the

Data-Assisted Design for Wind Loading

June 1, 2002
Author(s)
Emil Simiu, Fahim Sadek, T Whalen, S Jang, L L. Lu, S M. Diniz, A Grazini, Michael A. Riley
Current ASCE Standard provisions on wind loads for low-rise building design are based on wind tunnel tests conducted at the University of Western Ontario in the 1970's. In spite of the advances they entailed at the time, those provisions are inadequate

Fragility Curves, Damage Matrices, and Wind-Induced Loss Estimation

June 1, 2002
Author(s)
James J. Filliben, K Gurley, J P. Pinelli, Emil Simiu, M Subramanian
This note presents a conceptual framework for the definition of basic damage states and of the corresponding fragility curves and conditional probabilities, and its use for the estimation of damage matrices. The framework is designed with two

Structural Reliability Estimates and Database-Assisted Design for Wind

June 1, 2002
Author(s)
F Minciarelli, Fahim H. Sadek, Emil Simiu, Mircea Grigoriu
We propose a probabilistic methodology for developing improved estimates of extreme wind effects and load factors in standard provisions for wind loads. We obtained the following results: (1) the discrepancy between current estimates of safety indices for

Ultimate Capacities of Low-Rise Steel Frames in Turbulent Wind

July 1, 2001
Author(s)
S Jang, L L. Lu, Fahim H. Sadek, Emil Simiu
This paper is a derivative of G2001-1392, Database-Assisted Wind Load Capacity Estimates for Low-Rise Steel Frames, by Jang, S., et al., intended for publication in the Journal of Structural Engineering.The original paper's abstract was:A comparative study

Wind-Induced Peak Bending Moments in Low-Rise Building Frames

August 1, 2000
Author(s)
M Gioffre, Mircea Grigoriu, M Kasperski, Emil Simiu
We present a procedure for estimating peaks of non-Gaussian processes representing fluctuating internal forces induced by wind in low-rise building frames. The procedure is designed for inclusion in computer programs that use surface pressure data bases to

Chaotic Resonance, Hopping Rates, Spectra and Signal-to-Noise Ratios

January 1, 2000
Author(s)
A Kovaleva, Emil Simiu
We consider a noise-free bistable system with a low frequency signal and a secondary harmonic excitation that causes the systemto experience chaotic motion with a broadband portion of the output spectrum. The signal-to-noise ratio (SNR) is defined on

Chaotic Resonnce: Hopping Rates, Spectra and Signal-to-Noise Ratios.

January 1, 2000
Author(s)
Emil Simiu, A Kovaleva
We consider a noise-free bistable system with a low frequency signal and a secondary harmonic excitation that causes the system to experience chaotic motion with a broadband portion of the output spectrum. the signal-to-noise ration (SNR) is defined on the

Aerodynamic Databases and Electronic Standards for Windloads

August 1, 1998
Author(s)
T Whalen, Emil Simiu, G Harris, J Y. Lin, D Surry
As part of ongoing National Institute of Standards and Technology research on the development of a new generation of standard provisions for wind loads, we present results of a pilot project on the knowledge-based estimation of wind-induced bending moments
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