Wavelet Analysis of Extreme Wind Loads on Low-Rise Structures

dc.contributor.authorJanajreh, Isam Mustafa IIen
dc.contributor.committeechairHajj, Muhammad R.en
dc.contributor.committeememberTieleman, Henry W.en
dc.contributor.committeememberMook, Dean T.en
dc.contributor.committeememberHeller, Robert A.en
dc.contributor.committeememberRagab, Saad A.en
dc.contributor.committeememberKohler, Werner E.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T20:21:39Zen
dc.date.adate1998-04-23en
dc.date.available2014-03-14T20:21:39Zen
dc.date.issued1998-01-29en
dc.date.rdate1999-04-23en
dc.date.sdate1998-01-29en
dc.description.abstractOver the past thirty years, extensive research has been conducted with the objective of reducing wind damage to structures. Wind tunnel simulations of wind loads have been the major source of building codes. However, a simple comparison of pressure coefficients measured in wind tunnel simulations with full-scale measurements show that the simulations, in general, underpredict extreme negative pressure coefficients. One obvious reason is the lack of consensus on wind tunnel simulation parameters. The wind in the atmospheric surface layer is highly turbulent. In simulating wind loads on structures, one needs to simulate the turbulent character besides satisfying geometric and dynamic similitudes. Some turbulence parameters that have been considered in many simulations include, turbulence intensities, integral length scales, surface roughness, and frequency spectrum. One problem with these parameters is that they are time varying in the atmospheric boundary layer and their averaged value, usually considered in the wind tunnel simulations, cannot be used to simulate pressure peaks. In this work, we show how wavelet analysis and time-scale representation can be used to establish an intermittency factor that characterizes energetic turbulence events in the atmospheric flows. Moreover, we relate these events to the occurrence of extreme negative peak pressures.en
dc.description.degreePh. D.en
dc.identifier.otheretd-32198-124554en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-32198-124554/en
dc.identifier.urihttp://hdl.handle.net/10919/30414en
dc.publisherVirginia Techen
dc.relation.haspartjanajreh.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectpressure coefficientsen
dc.subjectturbulence intensitiesen
dc.subjectturbulence scalesen
dc.subjectwaveletsen
dc.subjectwind loadsen
dc.subjecthigher-order statisticsen
dc.subjectintermittencyen
dc.titleWavelet Analysis of Extreme Wind Loads on Low-Rise Structuresen
dc.typeDissertationen
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en
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