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为了防止联肢剪力墙中小跨高比连梁发生低延性剪切破坏,在单连梁中部设置一条通缝,形成开缝连梁改善其抗震性能。试验完成了3个小跨高比带板开缝连梁的低周反复加载,通过与其他配筋形式连梁对比,分析了开缝连梁的破坏形态、滞回特征、承载力退化、刚度退化、延性、耗能等一系列抗震性能。利用软件ABAQUS对试件滞回曲线的骨架曲线进行模拟,并将模拟结果和试验结果相对比。结果表明,小跨高比开缝连梁具有良好的承载能力及变形能力,施工较为方便且经济,能有效防止小跨高比连梁延性较差的剪切破坏,具有较好的抗震性能,可在实际工程中推广。
In order to prevent low ductile shearing failure of the connecting beam with small span ratio in the associated shear walls, a through-seam is set in the middle of the single beam to form a slit beam to improve the seismic performance. The test was completed three low-span repeated loading with a small span ratio plate with slot joints, compared with other beams in the form of reinforcement, analyzed the failure mode, the hysteretic characteristics, the bearing capacity degradation, the stiffness Degradation, ductility, energy consumption and a series of seismic performance. The software ABAQUS was used to simulate the skeleton curve of the specimen hysteresis curve, and the simulation results were compared with the experimental results. The results show that the small span ratio of slotted beams has good carrying capacity and deformation capacity, the construction is more convenient and economical, which can effectively prevent the shear damage of poor ductility of the beams with small span ratio, and has good seismic performance. Can be promoted in practical projects.