| 摘要: |
| 采用COMSOL Multiphysics软件，对不同温湿度耦合作用下的C30，C40路面混凝土内部所产生的应力和应变进行对比分析.结果表明：不同温湿度环境下，路面混凝土内部应力主要集中于板体棱角、各边和板体中部；C40路面混凝土在温湿度耦合作用下更易产生应力集中，且最大内应力是相同环境下C30路面混凝土的12倍左右；C30路面混凝土更易产生内部形变，最大内应变可达相同环境下C40路面混凝土的11~14倍；上述现象在温湿度均存在大梯度循环的耦合作用下更加显著. |
| 关键词: 路面混凝土 有限元数值模拟 温湿度耦合 内部应力和应变 |
| DOI：103969/j.issn.1007 9629201801013 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51278059)；中央高校基本科研业务费资助项目(0009 2014G1211010) |
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| Internal Stress Simulation of Pavement Concrete under Coupling Action of Temperature and Humidity |
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LI Xin, SHEN Aiqin
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School of Highway, Changan University, Xian 710064, China
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| Abstract: |
| With the aid of the software COMSOL Multiphysics, the analysis was made by comparing the internal stresses and strains between the two kinds of pavement concrete C30 and C40 under the coupling condition of different temperature and humidity.The results show that the internal stress generated in pavement concrete mainly concentrates on the central parts of the plate body, its sides and sharp edges when influenced by the coupling of temperature and humidity environment.In addition, pavement concrete C40 under of temperature and humidity coupling action easily produces stress concentration, the maximum of internal stress can be 12 times that of pavement concrete C30 in the same condition; while pavement concrete C30 is more likely to produce internal deformation, which can be 1114 times that of C40 in the same condition.Such phenomenon appears even more significantly under the coupling effect of big gradient in temperature and humidity. |
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