Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake

To improve seismic design of structures, providing more comprehensive criterion than the common criterions in structural seismic design is essential for the engineering community. The concept of energy has been considering as a seismic design philosophy in research communities; But there are some ga...

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Autores principales: Reza Vahdani, Mohsen Gerami, Mohamad Ali Vaseghi Nia
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Publicado: Iranian Society of Structrual Engineering (ISSE) 2018
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Acceso en línea:https://doaj.org/article/2a5d7985e4ef4a71b12ed1116efe82b4
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spelling oai:doaj.org-article:2a5d7985e4ef4a71b12ed1116efe82b42021-11-08T15:48:11ZStructural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake2476-39772538-261610.22065/jsce.2017.80788.1138https://doaj.org/article/2a5d7985e4ef4a71b12ed1116efe82b42018-07-01T00:00:00Zhttps://www.jsce.ir/article_47359_59ac59e9468290a70ef33536e1c58afe.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616To improve seismic design of structures, providing more comprehensive criterion than the common criterions in structural seismic design is essential for the engineering community. The concept of energy has been considering as a seismic design philosophy in research communities; But there are some gaps for application of energy concept and its development in seismic design, and filling a small part of these gaps is the main objective of this study. Energy criterion is simple, scalar and conceptual quantity. Easy using of spectrum as an efficient tool in engineering is noteworthy; therefore, study on effects of damping and ductility on input energy spectrum is effective step to exert the energy criterion in structural seismic design. In this research, by using nonlinear dynamic analysis for 4 damping ratios and 4 ductility factors, relative input energy spectra per unit mass of structure have been produced for 4 Iranian earthquakes. Then 64 spectra that produced in this study have been reviewed and obtained-results have been discussed. Scrutiny of spectra show that increasing of damping ratio and ductility have reduced spectrum’s changes. Also, variation of ductility factor is more effective than the variation of damping ratio on relative input energy spectrum. Variation of damping ratio and ductility factor have little effect on changing of peak corresponding period in relative input energy spectrum. Overall, with engineering estimate and in the range of damping ratios and ductility that have been studied in this research, has been concluded that in inelastic behavior range, input energy spectrum per unit mass has little sensitivity to changes of damping ratio and ductility in wide range of periods, and it is a function of structure’s period. Because lack of design engineer's awareness on real amounts of damping ratio and ductility when designing structure, it is one advantages of relative input energy spectrum.Reza VahdaniMohsen GeramiMohamad Ali Vaseghi NiaIranian Society of Structrual Engineering (ISSE)articleenergy spectrumdamping ratiodisplacement ductilityrelative input energyinput energy per unit massBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 2, Pp 5-21 (2018)
institution DOAJ
collection DOAJ
language FA
topic energy spectrum
damping ratio
displacement ductility
relative input energy
input energy per unit mass
Bridge engineering
TG1-470
Building construction
TH1-9745
spellingShingle energy spectrum
damping ratio
displacement ductility
relative input energy
input energy per unit mass
Bridge engineering
TG1-470
Building construction
TH1-9745
Reza Vahdani
Mohsen Gerami
Mohamad Ali Vaseghi Nia
Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake
description To improve seismic design of structures, providing more comprehensive criterion than the common criterions in structural seismic design is essential for the engineering community. The concept of energy has been considering as a seismic design philosophy in research communities; But there are some gaps for application of energy concept and its development in seismic design, and filling a small part of these gaps is the main objective of this study. Energy criterion is simple, scalar and conceptual quantity. Easy using of spectrum as an efficient tool in engineering is noteworthy; therefore, study on effects of damping and ductility on input energy spectrum is effective step to exert the energy criterion in structural seismic design. In this research, by using nonlinear dynamic analysis for 4 damping ratios and 4 ductility factors, relative input energy spectra per unit mass of structure have been produced for 4 Iranian earthquakes. Then 64 spectra that produced in this study have been reviewed and obtained-results have been discussed. Scrutiny of spectra show that increasing of damping ratio and ductility have reduced spectrum’s changes. Also, variation of ductility factor is more effective than the variation of damping ratio on relative input energy spectrum. Variation of damping ratio and ductility factor have little effect on changing of peak corresponding period in relative input energy spectrum. Overall, with engineering estimate and in the range of damping ratios and ductility that have been studied in this research, has been concluded that in inelastic behavior range, input energy spectrum per unit mass has little sensitivity to changes of damping ratio and ductility in wide range of periods, and it is a function of structure’s period. Because lack of design engineer's awareness on real amounts of damping ratio and ductility when designing structure, it is one advantages of relative input energy spectrum.
format article
author Reza Vahdani
Mohsen Gerami
Mohamad Ali Vaseghi Nia
author_facet Reza Vahdani
Mohsen Gerami
Mohamad Ali Vaseghi Nia
author_sort Reza Vahdani
title Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake
title_short Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake
title_full Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake
title_fullStr Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake
title_full_unstemmed Structural Damping and Displacement Ductility Effects on Input Energy Spectrum of Earthquake
title_sort structural damping and displacement ductility effects on input energy spectrum of earthquake
publisher Iranian Society of Structrual Engineering (ISSE)
publishDate 2018
url https://doaj.org/article/2a5d7985e4ef4a71b12ed1116efe82b4
work_keys_str_mv AT rezavahdani structuraldampinganddisplacementductilityeffectsoninputenergyspectrumofearthquake
AT mohsengerami structuraldampinganddisplacementductilityeffectsoninputenergyspectrumofearthquake
AT mohamadalivaseghinia structuraldampinganddisplacementductilityeffectsoninputenergyspectrumofearthquake
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