复合水泥混凝土路面板底应力及位移仿真

马云龙¹，岳贤君²，胡朋^1*

1.山东交通学院 交通土建工程学院，山东 济南  250357；

2.山东省人民防空建筑设计院有限责任公司，山东 济南  250023

摘要：为提高复合水泥混凝土路面的力学性能，采用ABAQUS有限元软件建立模型，分析在不同面板厚度、基层厚度、面板长度下，复合水泥混凝土路面板底应力和位移的变化，并与普通混凝土面板对比。结果表明：与普通混凝土路面一致，临界荷载位于纵缝边缘中部时复合水泥混凝土路面板底产生最大拉应力；临界荷载作用在板角，板底产生最大位移，复合水泥混凝土路面容易开裂。复合水泥混凝土路面层厚度变化对板底应力与位移的影响较大，基层厚度变化对板底应力与位移的影响较小，面板长度变化对板底应力与位移的影响极小，可忽略不计。复合水泥混凝土路面板对板底应力与位移变化的抵抗效果比普通混凝土面板好，较高强度水泥混凝土的厚度变化对复合水泥混凝土路面板底位移与应力有更大影响。设计混凝土路面时可适当调整不同强度水泥混凝土的厚度，改善路面的力学性能。

关键词：复合水泥混凝土路面；临界荷载位置；有限元模拟；应力；位移

Simulation of bottom stress and displacement of composite cement concrete pavement

MA Yunlong¹，YUE Xianjun²，HU Peng^1*

1.School of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China；

2.Shandong Civil Air Defense Architectural Design Institute Co., Ltd., Jinan 250023, China

Abstract:In order to improve the mechanical properties of composite cement concrete pavement, the finite element software ABAQUS is used to establish a model to analyze the changes of stress and displacement at the bottom of composite cement concrete pavement slab under different panel thickness, base thickness and panel length, and is compared with ordinary concrete slab. The results show that the maximum tensile stress occurs at the bottom of the composite cement concrete pavement slab, consistent with the ordinary concrete pavement, when the critical load is located in the middle of the longitudinal joint. The critical load acts on the slab corner and the maximum displacement occurs on the slab bottom, and the composite cement concrete pavement is easy to crack. The change of panel thickness of composite cement concrete pavement has a great impact on the stress and displacement of slab bottom, the change of base thickness has little effect on the stress and displacement of slab bottom, and the change of panel length has slight impact on the stress and displacement of slab bottom, which can be ignored. The resistance effect of composite cement concrete pavement slab to the change of slab bottom stress and displacement is better than that of ordinary concrete slab. The thickness change of higher strength concrete has greater influence on the displacement and stress of composite cement concrete pavement slab bottom. The thickness of different strength cement concrete can be appropriately adjusted to improve the mechanical properties of pavement while it is designed.

Keywords:composite cement concrete pavement; critical load location; finite element simulation; stress; displacement