Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM
In most of the structural blast-resistant designs and analysis single degree of freedom (SDOF) method is used. Generally, for this method flexural response of the structural members is considered but in axial loaded members, secondary moments (P-δ effects) are also very important. In the case of col...
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| Format: | Article |
| Language: | fas |
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Iranian Society of Structrual Engineering (ISSE)
2017-11-01
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| Series: | Journal of Structural and Construction Engineering |
| Subjects: | |
| Online Access: | https://www.jsce.ir/article_45955_17bd83ee52d4c574e5d865adefcf58f2.pdf |
| _version_ | 1819198971544862720 |
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| author | Mohammad Esmaeil Nia Omran Somayeh Mollaei |
| author_facet | Mohammad Esmaeil Nia Omran Somayeh Mollaei |
| author_sort | Mohammad Esmaeil Nia Omran |
| collection | DOAJ |
| description | In most of the structural blast-resistant designs and analysis single degree of freedom (SDOF) method is used. Generally, for this method flexural response of the structural members is considered but in axial loaded members, secondary moments (P-δ effects) are also very important. In the case of columns of building structures, which mostly bear significant axial loads, ignoring P-δ effects under lateral blast loading can be very risky. This paper describes a simple way for taking into account P-δ effects and also the effects of high strain rates (which is very important in severe dynamic loading) in SDOF analysis of reinforced concrete columns under simultaneous axial load and lateral blast loading. The resulting responses are compared with explicit finite element analysis using LS-DYNA hydro-code. Proposed SDOF equation of motion is numerically calculated and secondary moment and high strain rate effects are included within the calculation procedure. Secondary moments due to P-δ effects have been considered as equivalent lateral load and strain effects are introduced to the model by dynamic increasing factors for concrete and steel materials. Based on the main results, estimated response of RC column under blast loading using SDOF method has acceptable accuracy compared to LS-DYNA analysis results. |
| first_indexed | 2024-12-23T03:08:55Z |
| format | Article |
| id | doaj.art-51a86b2e10394bd8add1b6fba325eaf3 |
| institution | Directory Open Access Journal |
| issn | 2476-3977 2538-2616 |
| language | fas |
| last_indexed | 2024-12-23T03:08:55Z |
| publishDate | 2017-11-01 |
| publisher | Iranian Society of Structrual Engineering (ISSE) |
| record_format | Article |
| series | Journal of Structural and Construction Engineering |
| spelling | doaj.art-51a86b2e10394bd8add1b6fba325eaf32022-12-21T18:02:15ZfasIranian Society of Structrual Engineering (ISSE)Journal of Structural and Construction Engineering2476-39772538-26162017-11-0143819010.22065/jsce.2017.75048.106345955Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEMMohammad Esmaeil Nia Omran0Somayeh Mollaei1Assistant professor, Department of Civil Engineering, University of Kurdistan, Sanandaj, IranPhD student, Department of Civil Engineering, University of Kurdistan, Sanandaj, IranIn most of the structural blast-resistant designs and analysis single degree of freedom (SDOF) method is used. Generally, for this method flexural response of the structural members is considered but in axial loaded members, secondary moments (P-δ effects) are also very important. In the case of columns of building structures, which mostly bear significant axial loads, ignoring P-δ effects under lateral blast loading can be very risky. This paper describes a simple way for taking into account P-δ effects and also the effects of high strain rates (which is very important in severe dynamic loading) in SDOF analysis of reinforced concrete columns under simultaneous axial load and lateral blast loading. The resulting responses are compared with explicit finite element analysis using LS-DYNA hydro-code. Proposed SDOF equation of motion is numerically calculated and secondary moment and high strain rate effects are included within the calculation procedure. Secondary moments due to P-δ effects have been considered as equivalent lateral load and strain effects are introduced to the model by dynamic increasing factors for concrete and steel materials. Based on the main results, estimated response of RC column under blast loading using SDOF method has acceptable accuracy compared to LS-DYNA analysis results.https://www.jsce.ir/article_45955_17bd83ee52d4c574e5d865adefcf58f2.pdfsdof methodaxial forceblast loadsrc columnls-dyna software |
| spellingShingle | Mohammad Esmaeil Nia Omran Somayeh Mollaei Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM Journal of Structural and Construction Engineering sdof method axial force blast loads rc column ls-dyna software |
| title | Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM |
| title_full | Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM |
| title_fullStr | Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM |
| title_full_unstemmed | Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM |
| title_short | Estimation of RC columns’ response under the effect of lateral blast loading by SDOF method and comparison with FEM |
| title_sort | estimation of rc columns response under the effect of lateral blast loading by sdof method and comparison with fem |
| topic | sdof method axial force blast loads rc column ls-dyna software |
| url | https://www.jsce.ir/article_45955_17bd83ee52d4c574e5d865adefcf58f2.pdf |
| work_keys_str_mv | AT mohammadesmaeilniaomran estimationofrccolumnsresponseundertheeffectoflateralblastloadingbysdofmethodandcomparisonwithfem AT somayehmollaei estimationofrccolumnsresponseundertheeffectoflateralblastloadingbysdofmethodandcomparisonwithfem |