绿色装配式硬化面受力影响因素研究

Study on the Influencing Factors of the Forces on the Green Assembled Hardened Surface

通过有限元软件建立了预制装配式硬化面结构模型,分析了面层配筋率、基层类型及厚度、垫层厚度、预制板尺寸及厚度、土基模量和超载率等对硬化面结构沉降、预制板最大主拉应力和最大主压应力的影响规律。结果表明预制板厚度、土基模量和超载率对绿色装配式硬化面受力影响较大。预制板厚度从16 cm增加到22 cm时,最大主压应力减小了近50%,最大主拉应力减小了近40%,当土基模量从50 MPa增加到90 MPa时,最大沉降减小了36%,随着超载率的增加,结构沉降、预制板最大主拉应力和最大主压应力近似线性增大。

The prefabricated hardened surface structure model was established using the finite element software.Then the influences of the reinforcement ratio of the surface layer,the type and thickness of the base layer,the thickness of the cushion layer,the size and thickness of the prefabricated slab,the modulus of the soil foundation and the overload ratio on the settlement of the hardened surface structure,the maximum principal tensile stress and the maximum principal compressive stress of the prefabricated slab were analyzed.The results show that the thickness of precast slab,modulus of soil foundation and overload rate have great influence on the stress of green assembled hardened surface.When the thickness of precast slab increases from 16cm to 22cm,the maximum principal compressive stress decreases by nearly 50%,the maximum principal tensile stress decreases by nearly 40%.When the modulus of soil foundation increases from 50MPa to 90Mpa,the maximum settlement decreases by 36%.With the increase of overload rate,the structural settlement,the maximum principal tensile stress and the maximum principal compressive stress of precast slab increase approximately linearly.