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Displaying records 51 to 60 of 77 records.
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51. Time-Dependent Wind Effects: Database-Assisted Design and Estimation of Ultimate Limit States for Rigid and Flexible Structures
Published: 11/1/2002
Authors: Fahim 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

52. Control of Hysteretic Structures Using H(inf) Algorithm and Stochastic Linearization Techniques
Published: 7/1/2002
Authors: Fahim 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

53. Equivalent Number of Loading Cycles for the Seismic Testing of Passive Energy Dissipation Devices
Published: 7/1/2002
Authors: Fahim 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

54. Data-Assisted Design for Wind Loading
Published: 6/1/2002
Authors: Emil Simiu, Fahim 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

55. Structural Reliability Estimates and Database-Assisted Design for Wind
Published: 6/1/2002
Authors: F Minciarelli, Fahim 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

56. Peak Non-Gaussian Wind Effects for Data Base-Assisted Low-Rise Building Design
Published: 5/1/2002
Authors: Fahim Sadek, Emil Simiu
Abstract: Current procedures for estimating the peaks of the stochastic response of tall buildings to wind are based on the assumption that the response is Gaussian. Those procedures are therefore inapplicable to low-rise buildings, in which time histories of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860353

57. An Innovative Approach for Controlling Hysteretic Structures Using static Output Feedback H (inf) Algorithm and Stochastic Linearization Techniques
Published: 4/1/2002
Authors: Fahim 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=860428

58. Ultimate Capacities of Low-Rise Steel Frames in Turbulent Wind
Published: 7/1/2001
Authors: S Jang, L L Lu, Fahim Sadek, Emil Simiu
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860358

59. Design Procedures for Structures with Supplemental Dampers
Published: 4/1/2001
Authors: Fahim Sadek, Michael A Riley
Abstract: Passive energy dissipation devices are used to reduce the damage from earthquakes by absorbing a portion of the earthquake-induced energy in structures. Wide acceptance of these devices in structures will depend on the availability of simplified met ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860299

60. NIST Research on Structural Performance of Housing Systems
Published: 4/1/2001
Authors: Fahim Sadek, Michael A Riley
Abstract: An outline of NIST research in the area of structural performance of housing systems is presented in this paper. The performance of wood-frame houses in past earthquakes and hur-ricanes is summarized, and the state-of-the-art in experimental and ana ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860295



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