3661

3461

كارشناسي ارشد

زلزله

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1386

ده، 126، [II] ص: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

فرهاد بهنام فر

مجتبي ازهري

30/5/86

احمد نيكنام ، علي محمد مومني

مهندسي عمران

ID3461

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractSteel shear wall SSW as a lateral load bearing system has been in use since 1970 in tallbuildings especially in Japan and the US Research studies on the seismic behavior ofSSW s and past experience prove them as a very effective and ductile seismic resistantsystem Main advantages of this system are its large energy dissipation capacity lightnesscompared with the equivalent concrete shear wall high stiffness quick installation lessoccupation of useful building area and simplicity in being strengthened or replaced Despite the above facts there are some factors preventing a widespread use of SSW indesign and construction A void in most design codes on requirements and guidelines fordesign of steel concrete buildings composed of such elements inadequacy of informationof SSW s behavior in earthquakes comparing with that of RC shear walls and practicallymost important lack of a reliable and effective analytical tools for detailed analysis anddesign of SSW are among those factors With the above shortcomings in practice in this research an exact nonlinear finiteelement model of two multistory frame buildings 5 and 10 stories in height and one singlestory frame building containing an SSW in each story in the same bay is modeled andanalyzed In modeling of the SSW both material and geometrical nonlinearities are takeninto account and the post buckling behavior is captured To estimate the seismic behavior a nonlinear static pushover analysis is implemented on the models and their monotonicforce displacement behavior is followed up to the target design displacement Theaccuracy of the analytical model is approved through comparison with the pastexperiments Effects of factors such as cases with and without gravity loads distributionstype of the lateral loads number of stories type of modeling and existence of openings areinvestigated Through a vast parametric study for the cases with openings Effects of shape and relative size are studied Immature buckling of SSW resulting in nonlinear buckling offirst story columns adjacent to the wall is found to be the governing effects resulting in asharp decrease of system ductility for the case of large openings close to the wallperimeter Recommendations are presented for practical design of SSW s

فرهاد بهنام فر

مجتبي ازهري

احمد نيكنام ، علي محمد مومني