Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings
This study investigates the effect of spans length, reinforcement ratio and continuity of flexural reinforcement on the progressive collapse performance of double span beams over failed columns. The investigations focus on initial flexural resisting mechanism to prevent the progressive collapse. De...
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| Format: | Article |
| Language: | English |
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Electronic Journals for Science and Engineering - International
2023-07-01
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| Series: | Electronic Journal of Structural Engineering |
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| Online Access: | https://ejsei.com/EJSE/article/view/440 |
| _version_ | 1827856816671817728 |
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| author | Z.M. Najem Thaer Alrudaini |
| author_facet | Z.M. Najem Thaer Alrudaini |
| author_sort | Z.M. Najem |
| collection | DOAJ |
| description |
This study investigates the effect of spans length, reinforcement ratio and continuity of flexural reinforcement on the progressive collapse performance of double span beams over failed columns. The investigations focus on initial flexural resisting mechanism to prevent the progressive collapse. Detailed nonlinear finite element simulation of double span beam-column sub-assemblages subjected to residual gravity loads that initially carried by the failed column is adopted for the investigations. Nonlinear static pushover analysis is conducted in which capacity curves are derived and compared with demanded capacities. The effect of spans length, reinforcement ratio and number of continuous bottom flexural reinforcement on progressive collapse are considered in the investigations. Analysis results show that the strength to resist progressive collapse has decreased by 25.4 % and the ductility increased by 103 % following the increasing in span length from 5 m to 7 m. On the other hand, increasing reinforcement ratio of top flexural reinforcement from 0.447 to 1.089 leads to 26.27 % increasing in strength accompanied with a decrease in ductility equal to 16.42 %. In addition, extending all bottom bars rather than the minimum specified two bars resulted in 12 % increasing in strength and 40.28 % decreasing in ductility.
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| first_indexed | 2024-03-12T12:31:14Z |
| format | Article |
| id | doaj.art-01d627c92f4943f4a7416045970f64fc |
| institution | Directory Open Access Journal |
| issn | 1443-9255 |
| language | English |
| last_indexed | 2024-03-12T12:31:14Z |
| publishDate | 2023-07-01 |
| publisher | Electronic Journals for Science and Engineering - International |
| record_format | Article |
| series | Electronic Journal of Structural Engineering |
| spelling | doaj.art-01d627c92f4943f4a7416045970f64fc2023-08-29T10:22:31ZengElectronic Journals for Science and Engineering - InternationalElectronic Journal of Structural Engineering1443-92552023-07-0123310.56748/ejse.234403Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC BuildingsZ.M. Najem 0Thaer Alrudaini1Department of Projects and Engineering Services, Buildings Services Section, Thi-Qar Health Directorate, Thi-Qar, IraqCollage of Engineering, University of Basrah This study investigates the effect of spans length, reinforcement ratio and continuity of flexural reinforcement on the progressive collapse performance of double span beams over failed columns. The investigations focus on initial flexural resisting mechanism to prevent the progressive collapse. Detailed nonlinear finite element simulation of double span beam-column sub-assemblages subjected to residual gravity loads that initially carried by the failed column is adopted for the investigations. Nonlinear static pushover analysis is conducted in which capacity curves are derived and compared with demanded capacities. The effect of spans length, reinforcement ratio and number of continuous bottom flexural reinforcement on progressive collapse are considered in the investigations. Analysis results show that the strength to resist progressive collapse has decreased by 25.4 % and the ductility increased by 103 % following the increasing in span length from 5 m to 7 m. On the other hand, increasing reinforcement ratio of top flexural reinforcement from 0.447 to 1.089 leads to 26.27 % increasing in strength accompanied with a decrease in ductility equal to 16.42 %. In addition, extending all bottom bars rather than the minimum specified two bars resulted in 12 % increasing in strength and 40.28 % decreasing in ductility. https://ejsei.com/EJSE/article/view/440progressive collapsereinforced concreteflexural mechanism |
| spellingShingle | Z.M. Najem Thaer Alrudaini Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings Electronic Journal of Structural Engineering progressive collapse reinforced concrete flexural mechanism |
| title | Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings |
| title_full | Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings |
| title_fullStr | Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings |
| title_full_unstemmed | Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings |
| title_short | Parameters Affect Flexural Mechanism to Prevent Progressive Collapse of RC Buildings |
| title_sort | parameters affect flexural mechanism to prevent progressive collapse of rc buildings |
| topic | progressive collapse reinforced concrete flexural mechanism |
| url | https://ejsei.com/EJSE/article/view/440 |
| work_keys_str_mv | AT zmnajem parametersaffectflexuralmechanismtopreventprogressivecollapseofrcbuildings AT thaeralrudaini parametersaffectflexuralmechanismtopreventprogressivecollapseofrcbuildings |