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为了确定环境荷载作用下连续配筋混凝土路面(CRCP)力学分析模型中的边界条件,对环境荷载作用下CRCP的早期应力、应变进行测试。将应变计植入无应力瓦中测试混凝土与应力无关的应变,将应变计纵向埋入CRCP不同深度处测试混凝土的总应变、钢筋的应变、混凝土的膨胀系数以及凝结时的温度和应变,并计算出混凝土的应力。结果表明:在进行环境荷载作用下CRCP应力、应变分析时,混凝土与钢筋不是完全粘结的,裂缝处不能采用固定或自由边界条件,测试出的裂缝处钢筋的应力可以直接体现在裂缝处边界条件中;路面开裂时混凝土的应力与直接拉伸强度比较接近。
In order to determine the boundary conditions in the mechanical analysis model of continuous reinforced concrete pavement under environmental loading, the early stress and strain of CRCP under environmental loading were tested. The strain gauge is placed in a stress-free tile to test the strain-independent strain of the concrete. The strain gauge is longitudinally embedded into the CRCP at different depths to measure the total strain of the concrete, the strain of the reinforcement, the expansion coefficient of the concrete and the temperature and strain at the condensation Calculate the stress of concrete. The results show that the concrete is not completely bonded with the steel bar during stress and strain analysis under environmental loading, and the fixed or free boundary conditions can not be used in the crack. The stress of the steel bar at the crack can be directly reflected in the boundary of the crack Conditions; concrete cracking stress and direct tensile strength are relatively close.