考虑地基—混凝土非线性相互作用关系的CRCP端部锚固力计算方法

Calculation method on the anchor force at CRCP terminal using the nonlinear relation of subgrade and concrete interaction

在分析温度荷载作用下连续配筋混凝土路面 ( CRCP)端部变形与受力特点的基础上 ,根据地基与混凝土接触面剪切变形非线性相互作用关系 ,求得端部力学计算的解析解 ,分析了不同条件下端部 CRCP温度应力及其变形 ,并与线性模型的计算结果进行了对比 ,结果表明非线性模型的计算结果更加符合实际。通过分析设计参数变化对计算结果的影响 ,提出了端部锚固力实用计算方法。

Through the analysis of the response characteristics at CRCP terminal under thermal load,the solutions of the equlibrium difference equation for calculating the anchor force are derived based on the nonlinear interactional relation between the subgrade and concrete.The formula for the free movement and the anchor force at CRCP ends are present.The thermal stress and deformation under the different boundary conditions are analyzed and compared with the results from the linear relation between the subgrade and concrete,which shows the later is more coincident with the fact.The method to calculate the anchor force at CRCP ends is provided for the design of the anchor terminal structure.