Bi-axially loaded RC beam-column joints and haunch retrofit

被引：0
作者：
Angelo, Marchisella [1 ]
Giovanni, Muciaccia [1 ]
机构：
[1] Politecn Milan, Dept Civil & Environm Engn, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
来源：
BULLETIN OF EARTHQUAKE ENGINEERING | 2024年 / 22卷 / 6期
关键词：
Reinforced concrete; Beam-column joints; Bi-axial; Seismic; Haunch retrofit; SEISMIC RESPONSE VECTORS; CONCRETE; PERFORMANCE; CONNECTIONS; RESISTANCE; ENVELOPES; DESIGN; STRUT; MODEL;
D O I：
10.1007/s10518-024-01881-5
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
In this study, seismic bi-axially loaded RC beam-column joints are investigated. An experimental campaign on shear-critical corner joints is presented, including two as-built specimens and one retrofitted using fully-fastened-haunches (FFHR). Bi-axial tests adopted hexagonal protocol which is essentially to apply load in one direction double with respect to the other. Results obtained for as-built condition were included in a database of corner joints tested bi-axially and discussed in the light of the impact of bi-axial load on joint's shear strength. Further, non-linear finite elements were employed to thoroughly evaluate the bi-axial response. Haunch retrofit was capable to reduce both shear stresses and distortion at joint. Experimentally-derived internal forces were used to validate three-dimensional Strut-and-Tie model of the joints. Such design tool is recommended for practice cases adopting FFHR.
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收藏
页码：3125 / 3167
页数：43
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