黑龙江科技大学学报2024，Vol.34Issue(3)：394-400,7.DOI:10.3969/j.issn.2095-7262.2024.03.010
温湿效应下寒区水泥路面的破坏模式
Failure modes of cement concrete pavement in cold region under temperature and humidity effect
摘要
Abstract
This paper attempts to explore the reason of early damage of cement concrete pavement in north China.The study taking the cement concrete pavement during its service period in Heilongjiang Province as an object,analyzes the mechanical properties of the cement concrete pavement under environ-ment loads,coaxial types and axial loads combined with numerical simulation.The results show that the maximum tensile stress on the surface of cement concrete pavement increases sharply under the coupling effect of axial load-temperature and humidity,which is about 14 times of that under the action of load-dead weight.With the increase of axle load,the tensile stress at the surface of slab has a two-stage devel-oping trend from nonlinear to linear.The maximum tensile stress of the cement concrete pavement surface increases continuously under the superposition of stress from multiple wheel axes,in which the tensile stress from three-axis with double-wheel group is 1.079 times of the single-axis with double-wheel group,and the stress growth trend under action of different axes conforms to the two-stage model.The coupling effect of axle load and temperature-humidity environment factors leads to the surface-bottom tensile de-struction of the cement concrete pavement,and the overload and stress superposition effect from multi-ax-le result in the breakage of pavement panel angle.The two-stage regression model can describe the devel-opment trend of tensile stress of cement concrete pavement under different axles and loads.关键词
水泥混凝土路面/轴-温湿耦合/最大拉应力/破坏模式/寒区Key words
cement concrete pavement/coupling of load-temperature and humidity/maximum ten-sile stress/failure modes/cold region分类
交通工程引用本文复制引用
董连成,金圣豪,杨文静..温湿效应下寒区水泥路面的破坏模式[J].黑龙江科技大学学报,2024,34(3):394-400,7.基金项目
黑龙江省省属高等学校基本科研业务费项目(2021-KYYWF-1470) （2021-KYYWF-1470）
