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为了对连续配筋水泥混凝土路面的早期行为影响因素及其影响机制进行更为直观的研究分析,在连续配筋水泥混凝土路面安装了温度传感器、振弦式应变计(VWSG)和钢筋应变计分别观测水泥混凝土从浇筑到达到设计强度过程中其温度和应变变化以及钢筋的变形规律。观测结果表明:水泥混凝土28d龄期内最大拉应变为100με;水泥混凝土水化作用初期,钢筋的拉应变与混凝土应变状态一致;随着裂缝的产生,钢筋应变大于水泥混凝土应变,龄期15d时钢筋应变急剧增大,龄期22d后钢筋应变基本稳定在700με,并随日气温变化而周期性变化,钢筋最大应变达到1 000με;冬季环境温度5℃时裂缝平均宽度为0.52mm,小于设计最大裂缝宽度0.8mm。
In order to make a more intuitive study on the influencing factors of early behavior of continuous reinforced concrete pavement and its influence mechanism, temperature sensors, vibrating wire strain gauge (VWSG) and steel strain gauges were installed on the continuous reinforced concrete pavement respectively Observed cement concrete from pouring to reach the design strength of the process of its temperature and strain changes and the deformation of steel. The results show that the maximum tensile strain of cement concrete is 100με in 28d period. In the early stage of hydration of cement concrete, the tensile strain of reinforcing steel is consistent with that of concrete. With the generation of cracks, the strain of steel reinforcement is larger than that of cement concrete. The strain of steel increases sharply, and the strain of steel reinforcement is basically stable at 700με after 22 days of age and changes periodically with the change of daily temperature. The maximum strain of steel reaches 1000με. The average crack width at 0.5 ℃ in winter is 0.52mm, Crack width 0.8mm.