6679

6230

كارشناسي ارشد

سازه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1390

يازده، 138ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

مرتضي مدح خوان

فرهاد بهنام فر

17/2/91

علي حيدري، امير مهدي حلبيان

1396/10/06

كتابنامه

عمران

مهندسي عمران

ID6230

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Study on Influence of Earthquake Temporal Representation on Seismic Response of MDOF Structures by Wavelet Transform Arman Saberi armansaberi@yahoo com Date of Submission September 25 2011 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dr Morteza Madhkhan madhkhan@cc iut ac ir AbstractIn this thesis the influence of seismic acceleration parameters on seismic responses of structures was studied Astochastic approach was used to investigate correlation between 8 acceleration parameters and 11 maximumresponses of structure Also the filtering effect of records by wavelet transform on the value of correlation wasstudied In this stochastic research in the first stage the generation of artificial earthquake records waspursued These records were compatibled to design spectrum by continuous wavelet transform and using aniterative modification method To modify the baseline and denoising the accelerogram a wavelet denoisingmethod was used to correct the drift in velocity and displacement of ground motion For the generation ofartificial records an optimization method was used to obtain constant parameters of kanai Tagimi and clough penzien power spectrum The object of optimization was to maximize coordination between initial responsespectrum of artificial record and the design spectrum In the second stage 3 concrete frame with 1 4 and 8 story were modeled by OpenSees and non linear dynamicanalysis using 3 groups of records was done and the correlation coefficients between the seismic parameters andthe maximum responses were obtained One group of exitation included 100 nonfiltered artificial records and 2other groups including 100 filtered records generated by two different wavelet filtering methods The main result is that the spectral intencity parameter SI is the best parameter for predicting the response ofstructure also the mximum velocity of ground motion PGV has high correlation with seismic responses Bycomparing the correlation coefficients for the filtered and non filtered records it seems that SI and PGV havehigh correlation in both cases and conclude that they have lower dependence on high frequency of record thanother parameters Another important result is that the seismic acceleration parameters from filtered records haveoverally higher correlation with responses especially for the structures with lower natural periods Key words Artificial earthquake record corrolation acceleration parameter wavelet transform responsespectrum design spectrum spectral intencity PGV

مرتضي مدح خوان

فرهاد بهنام فر

علي حيدري، امير مهدي حلبيان