原文传递
Seismic Retrofit of Real Beam-Column Joints Using Fiber-Reinforced Cement Composites
| 题名： | Seismic Retrofit of Real Beam-Column Joints Using Fiber-Reinforced Cement Composites |
| 其他题名： | ACI(American Concrete Institute).(2014)."Building code requirements for structural concrete and commentary."ACI 318-14,Farmington Hills,MI,520. |
| 正文语种： | 英文 |
| 作者： | C. Del Vecchio |
| 关键词： | Old-type beam-column joints; Real building; Fiber-reinforced concrete (FRC); Seismic retrofit; Smooth bars; Poor quality concrete |
| 摘要： | This paper studies the seismic behavior of old-style reinforced concrete beam-column joints and the effectiveness of an innovative application of fiber-reinforced concrete (FRC) as a seismic strengthening solution. Two real joint subassemblies were extracted from an existing building damaged and demolished after the L'Aquila 2009 earthquake and tested in the laboratory. The joints exhibited poor-quality concrete and reinforcement details typical of old design practice, which are very difficult to reproduce in laboratory simulations. The joint tested in the as-built configuration shows brittle failure with joint diagonal cracking, as commonly observed in the aftermath of recent devastating earthquakes. The FRC thin jacketing prevents the joint panel shear failure, promoting amore favorable beam yielding. This results in a significant increase of the shear strength (until 50％) and energy dissipation (85％). The strengthening phases and the details of the proposed strengthening layout are described. The as-built and strengthened specimens are compared in terms of global and local behavior. Strain measurements on the FRC jacketing are also discussed as an effective design parameter. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N05004 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001999 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 05 |
| 页码： | 28-39 |
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