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Study on Reasonable Cracked Size for Old Concrete Pavement Slab

机译:旧混凝土路面合理裂缝尺寸的研究

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For the old concrete pavement with large proportion damage, it can be reconstructed by paving asphalt surface after cracked and stabilized with punching technique. But the cracked size is different in every country and there is no corresponding theory basis. With 3-D finite element method, the relationships between cracked size for concrete slab and load stress, thermal stress, coupling stress in asphalt overlay together with pressure stress on base surface were analyzed. The results show that the influence of cracked size on thermal stress and coupling stress is much greater than that of load stress. With the decrease of cracked size, the thermal stress and coupling stress in asphalt overlay decrease rapidly, the stress centralization at joints and cracks lessens evidently, while the pressure stress on base surface increases. Considering the factors synthetically, it is reasonable for the cracked size from 80 cm to 100 era.
机译:对于破损较大的旧混凝土路面,可采用打孔技术将裂缝开裂并稳定后的沥青路面摊铺,进行重建。但是每个国家的破解大小都不一样,也没有相应的理论基础。利用3D有限元方法,分析了混凝土板的裂缝尺寸与荷载应力,热应力,沥青覆盖层中的耦合应力以及基础表面的压力应力之间的关系。结果表明,裂纹尺寸对热应力和耦合应力的影响远大于载荷应力的影响。随着裂缝尺寸的减小,沥青覆盖层中的热应力和耦合应力迅速减小,接缝和裂缝处的应力集中明显减小,而基面上的压力应力则增大。综合考虑因素,裂纹尺寸从80厘米到100年代是合理的。

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