Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame
Based on the background of structural protection and Disaster Reduction Engineering, the dynamic behaviour and failure mechanism of restrained beams in portal steel frames in localised fire are investigated via experimental measurement and numerical simulation techniques. Comprehensive parametric st...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-07-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914722000915 |
| _version_ | 1797777463366909952 |
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| author | Yu-Xu Guo Feng Xi Ying-Hua Tan Feng Liu Ya-Chao Hu |
| author_facet | Yu-Xu Guo Feng Xi Ying-Hua Tan Feng Liu Ya-Chao Hu |
| author_sort | Yu-Xu Guo |
| collection | DOAJ |
| description | Based on the background of structural protection and Disaster Reduction Engineering, the dynamic behaviour and failure mechanism of restrained beams in portal steel frames in localised fire are investigated via experimental measurement and numerical simulation techniques. Comprehensive parametric studies are carried out to discuss the influence of end connection types, temperature, impact velocity, impact mass and span-to-depth ratio (SDR) on the dynamic response of the beams. The characteristics of deformation, internal force and energy distribution about the restrained beams and its joints are investigated. A temperature dependent criterion for evaluating the frame joint performance is proposed to measure the degree of performance degradation and impact resistance of the joint. The dynamic displacement amplification factor in different temperature environments are proposed for the different beam end constraint types and SDRs. Results of the experimental and numerical analysis show that the welded connection (WC) of three typical joint types is the strongest, and the extended endplate connection (EEC) is the weakest in terms of the impact resistance performance. With regard to the failure mode of the joint, the failure positions of the WC and the welded-bolted connection are located in the inner web of the column. Meanwhile, the EEC is located in the connection position between the beam and the endplate. Three different internal force stages and two obvious critical temperature boundaries of the restrained beams emerge with the increase in temperature, and they have significant characteristics in terms of deformation trend, internal force transfer and energy distribution. During the impact, a phenomenon known as “compression arch action” develops into “catenary action” with the increase in deflection in the frame beam mechanism. |
| first_indexed | 2024-03-12T23:04:18Z |
| format | Article |
| id | doaj.art-066d26aa6ee64c33ae183c839e860b9d |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-03-12T23:04:18Z |
| publishDate | 2023-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-066d26aa6ee64c33ae183c839e860b9d2023-07-19T04:23:31ZengKeAi Communications Co., Ltd.Defence Technology2214-91472023-07-0125174191Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frameYu-Xu Guo0Feng Xi1Ying-Hua Tan2Feng Liu3Ya-Chao Hu4School of Civil Engineering, Shandong Jianzhu University, Jinan, 250101, PR China; Key Laboratory of Building Structural Retrofitting and Underground Space Engineering, Shandong Jianzhu University, Jinan, 250101, PR ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan, 250101, PR China; Key Laboratory of Building Structural Retrofitting and Underground Space Engineering, Shandong Jianzhu University, Jinan, 250101, PR China; Corresponding author. School of Civil Engineering, Shandong Jianzhu University Jinan, 250101, PR China.School of Civil Engineering, Shandong Jianzhu University, Jinan, 250101, PR China; Key Laboratory of Building Structural Retrofitting and Underground Space Engineering, Shandong Jianzhu University, Jinan, 250101, PR ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, 266590, PR ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan, 250101, PR China; Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, 266590, PR ChinaBased on the background of structural protection and Disaster Reduction Engineering, the dynamic behaviour and failure mechanism of restrained beams in portal steel frames in localised fire are investigated via experimental measurement and numerical simulation techniques. Comprehensive parametric studies are carried out to discuss the influence of end connection types, temperature, impact velocity, impact mass and span-to-depth ratio (SDR) on the dynamic response of the beams. The characteristics of deformation, internal force and energy distribution about the restrained beams and its joints are investigated. A temperature dependent criterion for evaluating the frame joint performance is proposed to measure the degree of performance degradation and impact resistance of the joint. The dynamic displacement amplification factor in different temperature environments are proposed for the different beam end constraint types and SDRs. Results of the experimental and numerical analysis show that the welded connection (WC) of three typical joint types is the strongest, and the extended endplate connection (EEC) is the weakest in terms of the impact resistance performance. With regard to the failure mode of the joint, the failure positions of the WC and the welded-bolted connection are located in the inner web of the column. Meanwhile, the EEC is located in the connection position between the beam and the endplate. Three different internal force stages and two obvious critical temperature boundaries of the restrained beams emerge with the increase in temperature, and they have significant characteristics in terms of deformation trend, internal force transfer and energy distribution. During the impact, a phenomenon known as “compression arch action” develops into “catenary action” with the increase in deflection in the frame beam mechanism.http://www.sciencedirect.com/science/article/pii/S2214914722000915Restrained beamConnectionTemperatureImpactFailure modesInternal force mechanism |
| spellingShingle | Yu-Xu Guo Feng Xi Ying-Hua Tan Feng Liu Ya-Chao Hu Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame Defence Technology Restrained beam Connection Temperature Impact Failure modes Internal force mechanism |
| title | Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame |
| title_full | Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame |
| title_fullStr | Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame |
| title_full_unstemmed | Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame |
| title_short | Effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame |
| title_sort | effects of connection types and elevated temperature on the impact behaviour of restrained beam in portal steel frame |
| topic | Restrained beam Connection Temperature Impact Failure modes Internal force mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2214914722000915 |
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