An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems
Nonlinear dynamic analyses are performed to compute the maximum relative input energy per unit mass for 21 multi-degree-of-freedom systems (MDOF) with preselected target fundamental periods of vibration ranging from 0.2 to 4.0 s and 6 target inter-story ductility demands of 1, 2, 3, 4, 6, 8 subjecte...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Tehran Press
2018-12-01
|
| Series: | Civil Engineering Infrastructures Journal |
| Subjects: | |
| Online Access: | https://ceij.ut.ac.ir/article_68739_fcdf1f4e8764ae2c4914d7b1eb059462.pdf |
| _version_ | 1811343952810344448 |
|---|---|
| author | Behnoud Ganjavi Alireza Rezagholilou |
| author_facet | Behnoud Ganjavi Alireza Rezagholilou |
| author_sort | Behnoud Ganjavi |
| collection | DOAJ |
| description | Nonlinear dynamic analyses are performed to compute the maximum relative input energy per unit mass for 21 multi-degree-of-freedom systems (MDOF) with preselected target fundamental periods of vibration ranging from 0.2 to 4.0 s and 6 target inter-story ductility demands of 1, 2, 3, 4, 6, 8 subjected to 40 the earthquake ground motions. The efficiency of the several intensity measures as an index for damage potential of ground motion in MDOF systems are examined parametrically. To this end, the dispersion of normalized input energy by different intensity measures have been evaluated and compared. Results of this study show that using all intensity measures will result in a significant discrepancy in input energy spectra of MDOF systems, which are in most cases larger than 0.5 and even can take the value of 1.9 for some cases. This signifies that the evaluated intensity measures may not suitable for MDOF systems. A dimensionless intensity measure as a normalized energy index is proposed for MDOF systems subjected to far-fault earthquakes. It was demonstrated that the proposed normalized input energy values have smaller dispersion compared to those of the other indices for MDOF systems with all ranges of period and ductility ratio used. |
| first_indexed | 2024-04-13T19:39:06Z |
| format | Article |
| id | doaj.art-c535202aee174dee8952352e9413925f |
| institution | Directory Open Access Journal |
| issn | 2322-2093 2423-6691 |
| language | English |
| last_indexed | 2024-04-13T19:39:06Z |
| publishDate | 2018-12-01 |
| publisher | University of Tehran Press |
| record_format | Article |
| series | Civil Engineering Infrastructures Journal |
| spelling | doaj.art-c535202aee174dee8952352e9413925f2022-12-22T02:32:56ZengUniversity of Tehran PressCivil Engineering Infrastructures Journal2322-20932423-66912018-12-0151237338810.7508/ceij.2018.02.00868739An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom SystemsBehnoud Ganjavi0Alireza Rezagholilou1Department of Civil Engineering, University of Mazandaran, Babolsar, IranFaculty of Science and Engineering, Curtin University, Perth, Australia;Nonlinear dynamic analyses are performed to compute the maximum relative input energy per unit mass for 21 multi-degree-of-freedom systems (MDOF) with preselected target fundamental periods of vibration ranging from 0.2 to 4.0 s and 6 target inter-story ductility demands of 1, 2, 3, 4, 6, 8 subjected to 40 the earthquake ground motions. The efficiency of the several intensity measures as an index for damage potential of ground motion in MDOF systems are examined parametrically. To this end, the dispersion of normalized input energy by different intensity measures have been evaluated and compared. Results of this study show that using all intensity measures will result in a significant discrepancy in input energy spectra of MDOF systems, which are in most cases larger than 0.5 and even can take the value of 1.9 for some cases. This signifies that the evaluated intensity measures may not suitable for MDOF systems. A dimensionless intensity measure as a normalized energy index is proposed for MDOF systems subjected to far-fault earthquakes. It was demonstrated that the proposed normalized input energy values have smaller dispersion compared to those of the other indices for MDOF systems with all ranges of period and ductility ratio used.https://ceij.ut.ac.ir/article_68739_fcdf1f4e8764ae2c4914d7b1eb059462.pdfintensity measuresmdof systemsnonlinear dynamic analysisparametric studyseismic input energy |
| spellingShingle | Behnoud Ganjavi Alireza Rezagholilou An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems Civil Engineering Infrastructures Journal intensity measures mdof systems nonlinear dynamic analysis parametric study seismic input energy |
| title | An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems |
| title_full | An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems |
| title_fullStr | An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems |
| title_full_unstemmed | An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems |
| title_short | An Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems |
| title_sort | intensity measure for seismic input energy demand of multi degree of freedom systems |
| topic | intensity measures mdof systems nonlinear dynamic analysis parametric study seismic input energy |
| url | https://ceij.ut.ac.ir/article_68739_fcdf1f4e8764ae2c4914d7b1eb059462.pdf |
| work_keys_str_mv | AT behnoudganjavi anintensitymeasureforseismicinputenergydemandofmultidegreeoffreedomsystems AT alirezarezagholilou anintensitymeasureforseismicinputenergydemandofmultidegreeoffreedomsystems AT behnoudganjavi intensitymeasureforseismicinputenergydemandofmultidegreeoffreedomsystems AT alirezarezagholilou intensitymeasureforseismicinputenergydemandofmultidegreeoffreedomsystems |