Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams
Existing research on reduced beam section (RBS) connections in steel frames rarely addresses H-shaped beams with middle and wide flanges. Therefore, this study investigates the hysteretic behavior of RBS connections in H-shaped columns connected to H-shaped beams with middle and wide flanges. Using...
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2025-01-01
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| author | Saleem Mohammed Ali Ahmed Al-Saeedi Linfeng Lu Osama Zaid Yahya Al-Ansi Saddam Ali |
| author_facet | Saleem Mohammed Ali Ahmed Al-Saeedi Linfeng Lu Osama Zaid Yahya Al-Ansi Saddam Ali |
| author_sort | Saleem Mohammed Ali Ahmed Al-Saeedi |
| collection | DOAJ |
| description | Existing research on reduced beam section (RBS) connections in steel frames rarely addresses H-shaped beams with middle and wide flanges. Therefore, this study investigates the hysteretic behavior of RBS connections in H-shaped columns connected to H-shaped beams with middle and wide flanges. Using finite element analysis, the influence of key parameters (<i>a</i>, <i>b</i>, and <i>c</i>, where “<i>a</i>” represents the unweakened beam flange extension length, “<i>b</i>” represents the weakened beam flange length, and “<i>c</i>” represents the weakened beam flange depth, respectively) on structural performance was evaluated, focusing on rotational stiffness, load-carrying capacity, plastic rotation capacity, and ductility. The results indicate that increasing <i>a</i> enhances initial rotational stiffness and load capacity but reduces plastic rotation and ductility, making lower <i>a</i> values (near 0.5<i>b</i><sub>f</sub>) optimal for ductile performance. Similarly, higher <i>b</i> values (up to 0.85<i>b</i><sub>f</sub>) marginally reduce stiffness and load capacity, improving plastic rotation capacity, with a greater benefit in wide-flange beams. Meanwhile, a lower <i>c</i> value (around 0.20<i>b</i><sub>f</sub>) offered balanced performance, with higher <i>c</i> values decreasing stiffness and load capacity but enhancing ductility. Overall, wider flanges improve plastic rotation and ductility but slightly decrease rotational stiffness, providing insights to guide RBS connection designs for seismic resilience. |
| format | Article |
| id | doaj-art-860001503b5f4a7a9860d6f85de12715 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-860001503b5f4a7a9860d6f85de127152025-01-10T13:16:11ZengMDPI AGBuildings2075-53092025-01-0115114710.3390/buildings15010147Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape BeamsSaleem Mohammed Ali Ahmed Al-Saeedi0Linfeng Lu1Osama Zaid Yahya Al-Ansi2Saddam Ali3School of Civil Engineering, Chang’an University, 75 Chang’an Middle Rd, Xi’an 710062, ChinaSchool of Civil Engineering, Chang’an University, 75 Chang’an Middle Rd, Xi’an 710062, ChinaSchool of Civil Engineering, Chang’an University, 75 Chang’an Middle Rd, Xi’an 710062, ChinaSchool of Civil Engineering, Chang’an University, 75 Chang’an Middle Rd, Xi’an 710062, ChinaExisting research on reduced beam section (RBS) connections in steel frames rarely addresses H-shaped beams with middle and wide flanges. Therefore, this study investigates the hysteretic behavior of RBS connections in H-shaped columns connected to H-shaped beams with middle and wide flanges. Using finite element analysis, the influence of key parameters (<i>a</i>, <i>b</i>, and <i>c</i>, where “<i>a</i>” represents the unweakened beam flange extension length, “<i>b</i>” represents the weakened beam flange length, and “<i>c</i>” represents the weakened beam flange depth, respectively) on structural performance was evaluated, focusing on rotational stiffness, load-carrying capacity, plastic rotation capacity, and ductility. The results indicate that increasing <i>a</i> enhances initial rotational stiffness and load capacity but reduces plastic rotation and ductility, making lower <i>a</i> values (near 0.5<i>b</i><sub>f</sub>) optimal for ductile performance. Similarly, higher <i>b</i> values (up to 0.85<i>b</i><sub>f</sub>) marginally reduce stiffness and load capacity, improving plastic rotation capacity, with a greater benefit in wide-flange beams. Meanwhile, a lower <i>c</i> value (around 0.20<i>b</i><sub>f</sub>) offered balanced performance, with higher <i>c</i> values decreasing stiffness and load capacity but enhancing ductility. Overall, wider flanges improve plastic rotation and ductility but slightly decrease rotational stiffness, providing insights to guide RBS connection designs for seismic resilience.https://www.mdpi.com/2075-5309/15/1/147RBS connectionhysteretic behaviorfinite element analysisseismic performancerotational stiffnessductility |
| spellingShingle | Saleem Mohammed Ali Ahmed Al-Saeedi Linfeng Lu Osama Zaid Yahya Al-Ansi Saddam Ali Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams Buildings RBS connection hysteretic behavior finite element analysis seismic performance rotational stiffness ductility |
| title | Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams |
| title_full | Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams |
| title_fullStr | Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams |
| title_full_unstemmed | Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams |
| title_short | Hysteretic Behavior Study on the RBS Connection of H-Shape Columns with Middle-Flanges or Wide-Flange H-Shape Beams |
| title_sort | hysteretic behavior study on the rbs connection of h shape columns with middle flanges or wide flange h shape beams |
| topic | RBS connection hysteretic behavior finite element analysis seismic performance rotational stiffness ductility |
| url | https://www.mdpi.com/2075-5309/15/1/147 |
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