钢板夹芯混凝土组合板界面滑移计算分析

在钢板夹芯混凝土组合板中,界面滑移是影响组合板力学性能的一个重要因素。通过对界面滑移的理论分析,建立了其微分方程;根据截面剪力分布和边界条件求出了任意集中载荷和均布载荷作用下界面滑移的计算公式。采用实验结果对本文公式的合理性进行了验证,最大误差为22.22%。根据计算结果及其比较分析可知:界面滑移沿组合板纵向呈非线性变化,组合板端部界面滑移最大,沿组合板纵向向跨中逐渐减小,跨中界面滑移为零;剪力连接程度、含钢率对界面滑移影响较大,混凝土强度等级对其影响较小;界面滑移随着剪力连接程度的提高、含钢率的降低、混凝土强度等级的提高而减小。

Analysis of interfacial slip of steel-concrete-steel sandwich panel

The interfacial slip of the steel-concrete-steel sandwich panel greatly affects its mechanical properties.The interfacial slip is analyzed theoretically and the differential equations of the interfacial slip are established.According to the sectional shear distribution and boundary conditions,the computational formulas of the interfacial slip are presented under any concentrated load and the uniform load.The maximum error is 22.22% between the calculating results and the experimental results.The results obtained show that the interface slip changes nonlinearly along the longitudinal composite board,it attains its maximum in the end of the sandwich panel and gradually reduces along the longitudinal direction to the cross-section of largest moment,and the interfacial slip is approximately zero at the mid-span.The interfacial slip is greatly influenced by the shear connection degree and the steel content but independent of the strength grade of concrete.It decreases with the increasing of shear connection degree,the reducing of steel content and the upgrading of the strength of concrete.