CAJ | 학술논문

传统钢筋强度较低,不能满足现代化的建设需求；HRB500级钢筋强度满足要求,但是延性性能较差。因此,本文提出了一种采用新型工艺加工、生产的高性能钢筋(HRB500E),对配置HRB500E钢筋混凝土梁柱边节点的抗震性能进行了相关研究。通过3个梁柱边节点的足尺试件在低周往复荷载作用下的加载试验,研究柱轴压比和核心区配箍率对梁柱边节点的破坏模式、滞回特征、延性性能和耗能性能的影响。试验结果表明,配置HRB500E钢筋混凝土梁柱边节点具有良好的延性性能和耗能性能。其中,3个试件均属于梁端弯曲破坏,边节点核心区裂缝较少。随着核心区配箍率的增加,梁柱边节点的延性性能和耗能能力显著提高。然而,随着轴压比的增加,试件的延性系数和耗能能力下降均比较明显。
전통강근강도교저,불능만족현대화적건설수구；HRB500급강근강도만족요구,단시연성성능교차。인차,본문제출료일충채용신형공예가공、생산적고성능강근(HRB500E),대배치HRB500E강근혼응토량주변절점적항진성능진행료상관연구。통과3개량주변절점적족척시건재저주왕복하재작용하적가재시험,연구주축압비화핵심구배고솔대량주변절점적파배모식、체회특정、연성성능화모능성능적영향。시험결과표명,배치HRB500E강근혼응토량주변절점구유량호적연성성능화모능성능。기중,3개시건균속우량단만곡파배,변절점핵심구렬봉교소。수착핵심구배고솔적증가,량주변절점적연성성능화모능능력현저제고。연이,수착축압비적증가,시건적연성계수화모능능력하강균비교명현。
The traditional reinforcements fail to satisfy the modern constructional requirements due to the relatively low strength. Even HRB500 has higher capacity, its ductility lead to poor seismic behavior. Hence, a high performance reinforcement with new process and fabrication was proposed in this paper. The author focused on the seismic behavior of exterior RC beam-column joints with HRB500E reinforcements. Three full-scale exterior beam-column joint specimens were tested to failure under cyclic and low-frequent loading to investigate the influence of axial load ratio and core stirrup ratio on the failure mode, hysteretic characteristic, ductility behavior and energy dissipation. The results verified the excellent ductility behavior and energy dissipation of the exterior RC beam-column jointswith HRB500E reinforcements. Specifically, flexural failure occurred at the beam end of 3 specimens with small amount of cracks in the core. The increase of the core stirrup ratio enhanced the ductility behavior and energy dissipation of the joint. However, larger axial load ratio weakened those behaviors.