波纹钢板-混凝土界面黏结滑移性能试验

为研究波纹钢板-混凝土界面黏结滑移性能，综合考虑混凝土强度、保护层厚度及钢板埋置长度，设计了10个波纹钢板混凝土试件进行推出试验，研究其破坏形态、受力机理、应变分布、黏结强度与黏结滑移本构关系等关键问题。结果表明：波纹钢板混凝土组合构件主要发生黏结劈裂破坏和黏结锚固破坏，试件荷载-滑移曲线可分为微滑移段、滑移段、陡降段、缓降段及残余段；在荷载上升段，波纹钢板应变沿埋置长度呈指数分布形式，钢板自由端应变可能出现过零点现象；通过分析混凝土强度、保护层厚度及钢板埋置长度对波纹钢板-混凝土界面黏结强度的影响，线性拟合得出特征黏结强度计算式，理论值与试验值误差较小；基于波纹钢板-混凝土界面黏结滑移本构模型，通过ABAQUS软件对典型试件进行数值模拟，有限元模型曲线与试验曲线吻合度较高。

Bond-slip behavior of interface between corrugated steel plate and concrete

To study the bond-slip behavior of interface between corrugated steel plate and concrete, ten corrugated steel plate-concrete specimens were designed for push-out test, considering concrete strength, concrete cover thickness, and embedded length of steel plate. The failure modes, stress mechanism, strain distribution, bond strength, and bond-slip constitutive relations of the specimens were studied. Test results show that bond splitting failure and bond anchorage failure mainly occurred in the corrugated steel plate-concrete composite members. The load-slip curve could be divided into micro-slip stage, slip stage, steep-drop stage, gentle-drop stage, and residual stage. At the load rising stage, the strain of the corrugated steel plate distributed exponentially along the embedded length, and the phenomenon of zero-point crossing of strain might occur at the free end of the steel plate. By analyzing the influences of concrete strength, concrete cover thickness, and embedded length of steel plate on the bond strength of interface between corrugated steel plate and concrete, the calculation formulas of characteristic bond strength were fitted linearly, and the error between theoretical values and test results was small. Based on the bond-slip constitutive model of interface between corrugated steel plate and concrete, typical specimens were simulated by using ABAQUS software, and the curves of finite element model were in good agreement with test results.