Seismic performance of reinforced concrete interior beam-column joints with novel reinforcement detail
نویسندگان
چکیده
Horizontal stirrups are normally required in reinforced concrete (RC) beam-column joints (BCJs) for resisting shear forces seismic design. For RC moment-resisting frames subjected to a high lateral load, large number of needed joint cores. This may cause reinforcement congestion, leading construction difficulty and insufficient compaction, which can result poor performance. In this study, novel detail the form unbonded diagonal bars mechanically anchored at beam ends is proposed interior BCJs. The alleviates congestion through partially replacing horizontal stirrups, improves performance BCJs by plastic hinge relocation input force reduction mechanisms. Four 2/3-scale BCJ specimens were prepared tested under quasi-static cyclic including one specimen designed with current code three adopting detail. Test results show that able relocate hinges away from beam-joint interfaces as well improve loading capacity, energy dissipation stiffness, bonding condition reinforcements within cores combined use significantly enhances cracking resistance reduces distortion, while additional amount marginal improvement. Moreover, an analytical model considering adequately predict failure mode capacity specimens.
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ژورنال
عنوان ژورنال: Engineering Structures
سال: 2021
ISSN: ['0141-0296', '1873-7323']
DOI: https://doi.org/10.1016/j.engstruct.2020.111408