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将刚性或半刚性基层上水泥混凝土路面简化处理为弹性地基上不等平面尺寸双层结构模型,面层、基层层间接触采用二元弹簧来模拟水平向从光滑到连续,竖向从连续到分离的情形。进而,通过一些算例,讨论了有限元解的收敛性和单元划分,实体与薄板两种单元的适用性,基层超宽效应和邻板影响,以及半无限弹性体和Winkler两种地基类型的差异。结果表明:实体单元较薄板单元更适用于混凝土路面结构应力分析;基层超宽可降低面层应力0%―22%,但增大了基层自身应力;接缝设传力杆、拉杆可有效降低板底脱空程度;采用不等平面尺寸双层结构模型,由弯沉反算的地基模量k在不同荷位均较为一致。
The rigid or semi-rigid basement concrete pavement simplified to elastic foundation on the unequal plane size two-layer structure model, the surface layer, base layer contact between the use of binary spring to simulate the horizontal from smooth to continuous, vertical from the continuous Isolated situation. In addition, some examples are given to discuss the convergence of finite element solutions and element divisions, the applicability of the two elements of solid and thin plate, the super-wide-area effect and the influence of the adjacent plate, and the semi-infinite elastomers and Winkler difference. The results show that the physical unit is more suitable for the stress analysis of concrete pavement structure than the thin-plate unit. The extra width of the base layer can reduce the stress of the surface layer by 0% -22%, but increases the self-stress of the base layer. The degree of emptying of the bottom of the slab; using a two-layer structure model with unequal planar dimensions, the modulus k of the foundations inversely calculated by the deflection is relatively consistent at different charge levels.