以花纹钢板为上翼缘的钢-混凝土组合梁试验研究

发布时间：2018-04-09 21:20

本文选题：钢-混凝土组合梁　切入点：花纹钢板　出处：《建筑结构学报》2017年02期

【摘要】：为研究以花纹钢板为上翼缘的钢-混凝土组合梁的承载力和破坏机理,对花纹钢板-混凝土界面受剪试件进行了推出试验,对组合梁试件进行了受弯性能试验,分析了试件的破坏特征、应变分布和荷载-位移曲线。试验结果表明:扁豆型花纹钢板与混凝土界面的黏结强度介于光圆钢筋和螺纹钢筋混凝土黏结强度之间,混凝土对钢板的包裹作用对界面黏结强度有重要影响;组合梁受弯性能试件的最大挠度达到L/45(L为组合梁跨度),呈现明显的延性破坏特征;钢梁-混凝土翼板处于良好的共同工作状态,达到完全抗剪组合承载力;组合梁抗弯刚度组合作用系数约为0.4,界面滑移对变形的影响不可忽略。根据试验结果,给出组合梁的钢-混凝土界面受剪承载力和界面抗剪刚度计算方法。
[Abstract]:In order to study the bearing capacity and failure mechanism of steel-concrete composite beam with pattern steel plate as the upper flange, the shear specimens at the flange of the steel-concrete composite beam were tested and the flexural behavior of the composite beam specimens were tested.The failure characteristics, strain distribution and load-displacement curve of the specimen are analyzed.The experimental results show that the bond strength of the interface between lentil pattern steel plate and concrete is between the light circular steel bar and the reinforced concrete, and the bonding strength of the interface is affected by the enclosing effect of the concrete on the steel plate.The maximum deflection of composite beam is L / 45 L, which shows obvious ductile failure, and steel beam-concrete flange is in a good working state to achieve full shear bearing capacity.The combined action coefficient of flexural stiffness of composite beam is about 0.4, and the effect of interface slip on deformation can not be ignored.Based on the experimental results, the calculation method of the shear bearing capacity and the shear stiffness of the steel-concrete interface of composite beams are presented.
【作者单位】：浙江大学建筑工程学院;
【分类号】：TU398.9

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