Field Measurement and Analysis of Early-age Mechanical Response of Continuously Reinforced Concrete Pavement
Field Measurement and Analysis of Early-age Mechanical Response of Continuously Reinforced Concrete Pavement
复制标题
连续钢筋混凝土路面早期力学响应现场实测与分析
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Wang, Yan-Hui
中科院分区：
文献类型：
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作者：
Zuo, Zhi-Wu;Zhang, Hong-Liang;Wang, Yan-Hui
为了确定连续钢筋混凝土路面在环境荷载作用下的力学分析中合适的边界条件，对连续钢筋混凝土路面在环境荷载作用下的早期应变和应力进行了测量。利用嵌入半圆柱体的应变片，测量了与应力无关的应变。采用应变片测量了不同深度下混凝土的总应变、钢的应变、混凝土的热膨胀系数、混凝土凝结时的温度和应变。计算了混凝土的应力。结果表明：在环境荷载作用下分析CRCP的应力应变时，钢筋与混凝土粘结不完全，不存在完全自由或约束的跨裂缝边界条件，在跨裂缝边界条件下会出现钢筋纵向跨裂缝应变。计算的混凝土应力与实测抗拉强度接近。
In order to determine proper boundary condition in mechanical analysis of continuously reinforced concrete pavement(CRCP) under environmental loads,the strains and stresses of CRCP in early age under environmental loads were measured.Using strain gages embedded in half cylinders,the stress independent strains were measured.Using strain gages at different depths,the total strains in concrete,the strains in steels,the thermal expansion coefficient of concrete,temperature and strain at setting of concrete were measured.The stress of concrete was calculated.Results show that the steel is not completely bonded with concrete,the perfectly free or restrained boundary condition across cracking is not true,and the longitudinal steel strains across cracking will appear in boundary condition across cracking when analyzing the stress and strain of CRCP under environmental loads.The calculated concrete stress is close to the measured tensile strength.