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Author: fahim sadek

Displaying records 41 to 50 of 72 records.
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41. Wind Speeds in ASCE 7 Standard Peak-Gust Map: Assessment
Published: 4/1/2003
Authors: Emil Simiu, R Wilcox, Fahim H Sadek, James J Filliben
Abstract: The ASCE 7 peak-gust map division of the conterminous United States into two adjacent wind speed zones does not reflect correctly the country's differentiated extreme wind climate. The methodology used to develop the map averages out real climatolog ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860373

42. Wind Speeds in the ASCE 7 Standard Peak-Gust Map: An Assessment
Published: 4/1/2003
Authors: Emil Simiu, R Wilcox, Fahim H Sadek, James J Filliben
Abstract: The ASCE 7 peak-gust map division of the conterminous United States into two adjacent wind speed zones does not reflect correctly the country's differentiated extreme wind climate. The methodology used to develop the map averages out real climatolog ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860374

43. Distribution of Earthquake Input Energy in Structures
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6903
Published: 1/1/2003
Authors: P Khashaee, B Mohraz, Fahim H Sadek, Hai Sang Lew, John L Gross
Abstract: In developing an energy-based design approach and assessing the damage potential of structures, one must know the distribution of earthquake input energy among energy components: kinetic, elastic strain, hysteretic, and damping. This report examines ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860444

44. Database-Assisted Wind Load Capacity Estimates for Low-Rise Steel Frames
Published: 12/1/2002
Authors: S Jang, L L Lu, Fahim H Sadek, Emil Simiu
Abstract: A comparative study is presented of the estimated wind load capacities of low-rise steel building frames based on loading patterns (magnitude and distribution) established from aerodynamic databases on the one hand, and on patterns specified in the A ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860331

45. Database-Assisted Design for Wind: Basic Concepts and Software Development
Published: 11/1/2002
Authors: T Whalen, Fahim H Sadek, Emil Simiu
Abstract: Standard provisions for wind loads on buildings have traditionally been based on summary tables and/or plots suitable for slide-rule calculations. The accuracy in the definition of wind loads inherent in such tables and plots is far lower than that i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860398

46. Time-Dependent Wind Effects: Database-Assisted Design and Estimation of Ultimate Limit States for Rigid and Flexible Structures
Published: 11/1/2002
Authors: Fahim H Sadek, Emil Simiu, S Jong, L W Lu
Abstract: We describe the database-assisted design approach for wind loading, and its application for estimating limit states including ultimate limit states for low-rise buildings and tall buildings experiencing along-wind, across-wind, and torsional dyna ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860458

47. Control of Hysteretic Structures Using H(inf) Algorithm and Stochastic Linearization Techniques
Published: 7/1/2002
Authors: Fahim H Sadek, M Ben Ftima, S El-Borgi, G P McCormick, Michael A Riley
Abstract: This paper presents a robust static output feedback H(infinity) algorithm for control of hysteretic civil engineering structures subjected to earthquake ground motions. Hysteretic structures present a problem for control design and algorithm develop ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860427

48. Equivalent Number of Loading Cycles for the Seismic Testing of Passive Energy Dissipation Devices
Published: 7/1/2002
Authors: Fahim H Sadek, Michael A Riley
Abstract: Prototype testing of passive energy dissipation devices is required to verify their response characteristics and demonstrate their capacity to withstand the design loads. These tests usually consist of loading the devices with a defined number of cy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860447

49. Data-Assisted Design for Wind Loading
Published: 6/1/2002
Authors: Emil Simiu, Fahim H Sadek, T Whalen, S Jang, L L Lu, S M Diniz, A Grazini, Michael A Riley
Abstract: 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 inadequa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860462

50. Structural Reliability Estimates and Database-Assisted Design for Wind
Published: 6/1/2002
Authors: F Minciarelli, Fahim H Sadek, Emil Simiu, Mircea Grigoriu
Abstract: 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 indic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860324