Abstract
Beam-column joints (“BCJ”) are critical members in low-rise to mid-rise buildings. Failure of BCJ may lead to collapse of building. To strengthen non-seismically designed BCJ, a comprehensive study has been commissioned to develop a strengthening strategy for BCJ using unsymmetrical chamfers. Specifically, chamfers are proposed to be installed at beam-column corners and under the soffit only to alleviate the undesirable joint-shear failure. Tests were carried out on four 2/3-scale BCJ, comprising one control specimen and three strengthened specimens including 300 mm chamfers with and without U-bars and 150 mm chamfers with U-bars. The specimens were subjected to moderate level of axial load and loaded to failure under quasi-static cyclic loading. It has been shown that unsymmetrical chamfers are effective to protect a non-seismically designed BCJ against failure at joint core. Mode of failure is shifted from joint-shear in the control specimen to column-flexure in the strengthened specimens. To enhance the performance of BCJ, size of chamfer is more crucial in comparison with providing reinforcements inside the chamfers.
| Original language | English |
|---|---|
| Pages (from-to) | 575-582 |
| Number of pages | 8 |
| Journal | Engineering Structures |
| Volume | 191 |
| DOIs | |
| Publication status | Published - 15 Jul 2019 |
ASJC Scopus subject areas
- Civil and Structural Engineering