6683

6234

كارشناسي ارشد

سازه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1390

ده، 204ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

مرتضي مدح خوان

فرهاد بهنام فر

17/2/91

رحيم زاده، كياچهربهفرنيا

1395/08/24

كتابنامه

عمران

مهندسي عمران

ID6234

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Evaluation of Reduction Factor for Precast Concrete Frames with Semi Rigid Connections Neyram Ahooghalandary s ahooghalandary@cv iut ac ir Date of Submission January 31 2012 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisors Dr Morteza Madhkhan Madhkhan@cc iut ac ir ABSTRACT With increasing population and need of building construction in low cost and little time we requireusing the precast structures Precasting is defined as the production of prefabricated segments infactory and install and connecting them in the site Important advantage of this industry is theproduction of precast segments in large numbers with little time Because the concrete is one of thebest primary materials for building industry using precast concrete buildings is developed morethan before In spite of many studies on performance of this type of structures in low seismicregions due to some problems the precast industry has not reached to its whole potential yet Themain problem is due to precast concrete connections It causes the difference between seismicbehavior of precast and monolithic structures Therefore little information exists about thesestructures Nowadays the main parts of seismic design building codes use linear analysis The reduction factoris an important factor in linear analysis that indicates inelastic behaviors of structure such asresistance and ductility in nonlinear stage This factor is obtained from three coefficients ductilityreduction factor over strength factor and allowable stress factor In seismic codes this coefficient is just written with a constant value Whereas it depend on period ductility site condition and so on Considering the effect of precast concrete connection on theseismic performance of precast structure and factor such as period and ductility reduction factor ofthese structures are different from monolithic one So determining of this factor is necessary forthese structures In this research moment resisting frames and dual systems in 4 6 8 stories with 1 3 5 bays wereinvestigated by means of Perform 3D software The effect of four types of typical beam to columnconnections and two types of horizontal and vertical panel connections were evaluated Nonlinearstatic pushover in three forms of triangular uniform and modal was used At the end the effect of factors such as the semi rigid connections the number of bays the numberof stories and the effect of distribution of lateral loads were studied The results indicate precastconcrete moment resisting frames with semi rigid connections have reduction factor smaller thanmonolithic moment frames and precast dual systems could have values equal or more thanequivalent dual systems Keywords precast moment resisting frame precast dual system reduction factor semi rigidconnection pushover analysis

مرتضي مدح خوان

فرهاد بهنام فر

رحيم زاده، كياچهربهفرنيا