原文传递
Strength and Plastic Rotation Capacity of Ⅰ-Shaped Beams with Grid-Purlin System Subjected to Cyclic Loading
| 题名： | Strength and Plastic Rotation Capacity of Ⅰ-Shaped Beams with Grid-Purlin System Subjected to Cyclic Loading |
| 正文语种： | eng |
| 作者： | Matsui, Ryota;Koizumi, Koichi;Lin, Pao-Chun;Iwanaga, Masanobu;Wu, An-Chien;Takeuchi, Toru;Tsai, Keh-Chuyan |
| 作者单位： | Hokkaido Univ Grad Sch Engn Kita Ku A5-04 Kita 13 Nishi 8 Sapporo Hokkaido 0608628 Japan;Tokyo Inst Technol Dept Architecture & Bldg Engn Meguro Ku M1-29 2-12-1 Ookayama Tokyo 1528552 Japan;Natl Cheng Kung Univ Dept Civil Engn 1 Univ Rd Tainan 701 Taiwan;Kyushu Daiichi Ind Co Ltd 672 Arisa Kagamimachi Kumamoto 8694213 Japan;Natl Ctr Res Earthquake Engn 200 Sect 3 Xinhai Rd Taipei 106 Taiwan;Tokyo Inst Technol Dept Architecture & Bldg Engn Meguro Ku M1-29 2-12-1 Ookayama Tokyo 1528552 Japan;Natl Taiwan Univ Dept Civil Engn 1 Sect 4 Roosevelt Rd Taipei 10617 Taiwan |
| 关键词： | Beam;Purlin;Stability bracing of beams;Plastic rotation capacity;Cyclic loading test |
| 摘要： | This paper introduces a grid-purlin system, which was composed of secondary rectangular-hollow-section grids welded onto the top flange of I-shaped beams of moment frames. The welded grid-purlin itself may play a role of a lateral bracing member for the welded beam. However, the ultimate strength, plastic rotation capacity, or other structural characteristics of this grid-purlin system remain poorly understood. This paper presents two full-scale cyclic loading tests on specimens with I-shaped beams 700 mm deep, 240 mm wide, and 13 m long. The diagonal length of grids in the square grid-purlin of the specimen was 1.3 m on-center, and two different depths of the sections were selected for the purlin sections. Both specimens successfully achieved fully plastic moments at a plastic rotation exceeding 0.04 rad. This shows that the grid-purlin system provides reliable lateral bracing. Continuum finite-element (CFE) analysis was performed to simulate the hysteretic experimental response of the grid-purlin system. This CFE model was used to examine the plastic rotation capacity for a variety of combinations of I-shaped beams and grid-purlins. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 7 |
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