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通过9组18个剪力键推出试件的静载破坏试验,研究开孔波折板剪力键在外荷载作用下的破坏特征及各工作阶段的荷载~滑移性能。对试验数据回归统计分析得出,在弹性段内,开孔波折板剪力键的荷载~滑移关系呈线性,曲线斜率与混凝土榫抗剪刚度有关,在弹塑性段,荷载~滑移关系呈幂函数,曲线斜率主要与贯穿钢筋抗拉强度和混凝土榫抗剪刚度相关,影响开孔波折板剪力键荷载滑移性能的主要影响因素为开孔折板横向投影面积、钢板的开孔面积、混凝土立方体强度,贯穿钢筋抗拉屈服强度,贯穿钢筋的横截面积。最终提出了开孔波折板剪力键的荷载~滑移关系分阶段计算公式。
Through nine groups of 18 shear keys, the static load failure test of the test piece is introduced to study the failure characteristics of open shear wave plate shear plate under external load and the load-slip performance of each working stage. The regression analysis of test data shows that in the elastic section, the load-slip relationship of the shearing key of the perforated corrugated plate is linear and the slope of the curve is related to the shearing stiffness of the concrete tenon. In the elastic-plastic section, the relationship between load and slip The slope of the curve is mainly related to the tensile strength of the through rebar and the shear stiffness of the concrete tenon. The main influencing factors of the sliding properties of the shear stress of the perforated plate are the transverse projection area of the perforated flap, the opening of the steel plate Area, concrete cube strength, tensile strength across the reinforcement, cross-sectional area throughout the reinforcement. Finally, the formula of stage-load relationship of load-slip relationship is proposed.