Behavior and Capacity of Moment-Frame Members and Connections during Fire
This paper focuses on investigating the structural behavior of members and connections that are part of moment frames under the combined effect of bending moment and thermally induced axial force during a compartment-fire event. The finite-element analysis method was employed to conduct this study u...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-02-01
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| Series: | Fire |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2571-6255/6/2/78 |
| _version_ | 1797621067838128128 |
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| author | Supriya N. Chinivar Kadir C. Sener |
| author_facet | Supriya N. Chinivar Kadir C. Sener |
| author_sort | Supriya N. Chinivar |
| collection | DOAJ |
| description | This paper focuses on investigating the structural behavior of members and connections that are part of moment frames under the combined effect of bending moment and thermally induced axial force during a compartment-fire event. The finite-element analysis method was employed to conduct this study using models benchmarked against experimental data from several past studies while utilizing temperature-dependent material models. A numerical parametric study on typical floor beams with slender elements for compression were conducted under combined bending and axial loading to develop interaction-capacity curves at temperatures representing fire events. The results were compared against the member-strength equations provided in the AISC Specification. The analysis results demonstrated that the AISC beam-column strength equations including the combined effects of axial-load and bending moment provided reasonable estimates for member-slenderness ratios greater than 60, but overestimated the strength of beams with slender elements for low member-slenderness ratios. Combined-load-strength studies were also conducted on a typical connection used in moment frames. The moment-connection behavior was governed by failure modes exhibited at the ends of floor beams. Therefore, the interaction equations available for beam columns resulted in conservative estimates and are recommended for calculating moment-connection capacity during compartment-fire scenarios. |
| first_indexed | 2024-03-11T08:50:25Z |
| format | Article |
| id | doaj.art-02b078f2a03b4389a7d550d001255370 |
| institution | Directory Open Access Journal |
| issn | 2571-6255 |
| language | English |
| last_indexed | 2024-03-11T08:50:25Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fire |
| spelling | doaj.art-02b078f2a03b4389a7d550d0012553702023-11-16T20:27:34ZengMDPI AGFire2571-62552023-02-01627810.3390/fire6020078Behavior and Capacity of Moment-Frame Members and Connections during FireSupriya N. Chinivar0Kadir C. Sener1Uzun + Case, LLC, Atlanta, GA 30309, USACivil and Environmental Engineering, Auburn University, Auburn, AL 36830, USAThis paper focuses on investigating the structural behavior of members and connections that are part of moment frames under the combined effect of bending moment and thermally induced axial force during a compartment-fire event. The finite-element analysis method was employed to conduct this study using models benchmarked against experimental data from several past studies while utilizing temperature-dependent material models. A numerical parametric study on typical floor beams with slender elements for compression were conducted under combined bending and axial loading to develop interaction-capacity curves at temperatures representing fire events. The results were compared against the member-strength equations provided in the AISC Specification. The analysis results demonstrated that the AISC beam-column strength equations including the combined effects of axial-load and bending moment provided reasonable estimates for member-slenderness ratios greater than 60, but overestimated the strength of beams with slender elements for low member-slenderness ratios. Combined-load-strength studies were also conducted on a typical connection used in moment frames. The moment-connection behavior was governed by failure modes exhibited at the ends of floor beams. Therefore, the interaction equations available for beam columns resulted in conservative estimates and are recommended for calculating moment-connection capacity during compartment-fire scenarios.https://www.mdpi.com/2571-6255/6/2/78fire responsecompartment firebeam-column connectionscombined moment and axial forcethermally induced demandsfinite-element analysis |
| spellingShingle | Supriya N. Chinivar Kadir C. Sener Behavior and Capacity of Moment-Frame Members and Connections during Fire Fire fire response compartment fire beam-column connections combined moment and axial force thermally induced demands finite-element analysis |
| title | Behavior and Capacity of Moment-Frame Members and Connections during Fire |
| title_full | Behavior and Capacity of Moment-Frame Members and Connections during Fire |
| title_fullStr | Behavior and Capacity of Moment-Frame Members and Connections during Fire |
| title_full_unstemmed | Behavior and Capacity of Moment-Frame Members and Connections during Fire |
| title_short | Behavior and Capacity of Moment-Frame Members and Connections during Fire |
| title_sort | behavior and capacity of moment frame members and connections during fire |
| topic | fire response compartment fire beam-column connections combined moment and axial force thermally induced demands finite-element analysis |
| url | https://www.mdpi.com/2571-6255/6/2/78 |
| work_keys_str_mv | AT supriyanchinivar behaviorandcapacityofmomentframemembersandconnectionsduringfire AT kadircsener behaviorandcapacityofmomentframemembersandconnectionsduringfire |