P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes
In structural analysis, P-Delta effect refers to the changes in internal forces due to P-Delta moment which can be found by multiplying gravity load (P) by the lateral displacement of structure for earthquake lateral load (Delta). The influence of P-Delta in elastic response of structures is ignorab...
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| Format: | Article |
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University of Qom
2022-02-01
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| Series: | پژوهشهای زیرساختهای عمرانی |
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| Online Access: | https://cer.qom.ac.ir/article_1997_0c5ada5b97b7d1b4a22f4291463ff535.pdf |
| _version_ | 1797232961606647808 |
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| author | Mohammadhosein Hajimohammadi Horr Khosravi Reza Dezvareh |
| author_facet | Mohammadhosein Hajimohammadi Horr Khosravi Reza Dezvareh |
| author_sort | Mohammadhosein Hajimohammadi |
| collection | DOAJ |
| description | In structural analysis, P-Delta effect refers to the changes in internal forces due to P-Delta moment which can be found by multiplying gravity load (P) by the lateral displacement of structure for earthquake lateral load (Delta). The influence of P-Delta in elastic response of structures is ignorable, but P-Delta effect should be given more attention when the structure responds in inelastic range. On the other hand, the influence of ground motion duration is magnified when P-Delta effect is considered in the structural analysis. In this paper, to consider the simultaneous effect of ground motion duration and P-Delta effect, an algorithm is implemented in MATLAB which employs OPENSEES for linear and nonlinear dynamic analysis of elasto-plastic systems subjected to long- and short-duration records. The analysis results indicate that the frequency of structural collapse for long-duration ground motions is about twice of short-duration ground motions. The frequency of collapse also increases when ductility and stability index increase, but decreases when the period of structure increases. Furthermore, the increase of ground motion duration has no influence on the residual displacement of structures, but nonlinear behavior of structures and gravity load effect increase the residual displacements. |
| first_indexed | 2024-04-24T16:08:36Z |
| format | Article |
| id | doaj.art-2a287a42a9d641f0a27410b0060817da |
| institution | Directory Open Access Journal |
| issn | 2783-140X |
| language | fas |
| last_indexed | 2024-04-24T16:08:36Z |
| publishDate | 2022-02-01 |
| publisher | University of Qom |
| record_format | Article |
| series | پژوهشهای زیرساختهای عمرانی |
| spelling | doaj.art-2a287a42a9d641f0a27410b0060817da2024-03-31T19:58:34ZfasUniversity of Qomپژوهشهای زیرساختهای عمرانی2783-140X2022-02-0172516010.22091/cer.2021.7289.12901997P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration EarthquakesMohammadhosein Hajimohammadi0Horr Khosravi1Reza Dezvareh2Babol Noshirvani University of TechnologyFaculty of civil engineering department/ Babol Noshirvani University of TechnologyFaculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, IranIn structural analysis, P-Delta effect refers to the changes in internal forces due to P-Delta moment which can be found by multiplying gravity load (P) by the lateral displacement of structure for earthquake lateral load (Delta). The influence of P-Delta in elastic response of structures is ignorable, but P-Delta effect should be given more attention when the structure responds in inelastic range. On the other hand, the influence of ground motion duration is magnified when P-Delta effect is considered in the structural analysis. In this paper, to consider the simultaneous effect of ground motion duration and P-Delta effect, an algorithm is implemented in MATLAB which employs OPENSEES for linear and nonlinear dynamic analysis of elasto-plastic systems subjected to long- and short-duration records. The analysis results indicate that the frequency of structural collapse for long-duration ground motions is about twice of short-duration ground motions. The frequency of collapse also increases when ductility and stability index increase, but decreases when the period of structure increases. Furthermore, the increase of ground motion duration has no influence on the residual displacement of structures, but nonlinear behavior of structures and gravity load effect increase the residual displacements.https://cer.qom.ac.ir/article_1997_0c5ada5b97b7d1b4a22f4291463ff535.pdfp-delta effectstrong motion durationresidual displacementcollapse capacityelasto-plastic system |
| spellingShingle | Mohammadhosein Hajimohammadi Horr Khosravi Reza Dezvareh P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes پژوهشهای زیرساختهای عمرانی p-delta effect strong motion duration residual displacement collapse capacity elasto-plastic system |
| title | P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes |
| title_full | P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes |
| title_fullStr | P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes |
| title_full_unstemmed | P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes |
| title_short | P-Delta Effect on Residual Displacement and Collapse Capacity of SDOF Systems during Long and Short Duration Earthquakes |
| title_sort | p delta effect on residual displacement and collapse capacity of sdof systems during long and short duration earthquakes |
| topic | p-delta effect strong motion duration residual displacement collapse capacity elasto-plastic system |
| url | https://cer.qom.ac.ir/article_1997_0c5ada5b97b7d1b4a22f4291463ff535.pdf |
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