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Damage Control of Composite Steel Beams Using Flexible Gel-Covered Studs
| 题名： | Damage Control of Composite Steel Beams Using Flexible Gel-Covered Studs |
| 正文语种： | 英文 |
| 作者： | Kailai Deng; Xianzhi Zeng; Masahiro Kurata, A.M.ASCE; Canhui Zhao; Kako Onishi |
| 作者单位： | Southwest Jiaotong Univ |
| 关键词： | Damage control; Flexible gels; Slab cracking; Partial composite; Numerical simulation |
| 摘要： | This paper proposes flexible-gel-covered (FGC) studs to reduce the seismic damage of a concrete floor slab in a steel frame. Flexible gel strips intentionally release the shear constraint between the slabs and the steel beams. To evaluate the effectiveness of the proposed FGC studs, a proof-of-concept test was conducted. Three beam-column connection specimens with different shear-constraint configurations were designed and quasistatically tested according to a seismic loading protocol. The load-deformation relationship, crack development, and other results were obtained and indicated that the slab cracking and beam strain were reduced, whereas the initial stiffness and load-carrying capacity also slightly decreased. The results are promising but not satisfactory, and the current design still requires extensive floor slab repair after a large earthquake. Thus, the appropriate shape and configuration of the FGC stud must be further investigated. Based on the test results, a sophisticated finite-element numerical model was developed using widely used commercial finite-element computer software, and could reproduce the hysteresis behavior, including the beam-end fracture. Finally, parametric analyses were conducted to obtain the desirable shear-constraint behavior. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.03 |
| 页码： | 04019216 |
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