弹性地基上双层板板间结合状态的影响

Effects of slab in-between contact conditions on the stress status for double-layer concrete slabs on elastic foundation

根据克希霍夫薄板理论,分析了轴对称垂直荷载作用下弹性地基上双层板板间结合状态及中性面位置对板受力状态的影响。研究结果表明:结合式双层板的中性面位置对其受力特性有重要影响;双层板的板间结合状态由完全光滑变为完全连续时,板的抗变形能力增强;结合式双层板的板弯刚度较分离式双层板的板弯刚度要大,当结合式双层板的中性面位于两板的接触面上时,其板弯刚度达到最大,可为水泥混凝土路面设计提供一些理论参考。

G. Kirchhoff thin slab theory was employed to analyze the effects of contact conditions between slabs and the neutral plane position under the stresses of double layer concrete slab on elastic foundation under vertical axisymmetric loading. It indicated that the neutral plane position strongly affects the stress conditions of the bonded doublelayer concrete slabs. The deformation resistance of the slab increases as the slab in-between contact conditions changes from being fullslip to fully-bonded. The bending rigidity for the fully-bonded slabs is larger than that for the full-slip slabs. The bending rigidity reaches its maximum val-ue when the neutral plane coincides with the slab interface for the fully-bonded slabs. The results can provide some theoretical references for the cement concrete pavement design.