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温度作用是混凝土曲线梁桥产生典型病害的原因之一,为了研究混凝土曲线梁桥的温度效应问题,以一座城市混凝土曲线梁模型桥为对象,对桥跨结构进行了两年多的温度场和支反力的观测。研究了用Abaqus程序并结合箱梁温度场边界热力学参数计算方法对该桥温度场进行仿真计算,计算值与实测值吻合良好。基于温度场的观测数据,确定了该桥的升温温度梯度和降温温度梯度模式,并与现行规范中的温度梯度模式进行了对比。最后,对该桥的温度梯度效应进行了数值分析,实测支反力与计算支反力吻合较好,验证了分析模型的可行性和可靠性。
In order to study the temperature effect of concrete curved beam bridge, taking a city concrete curved beam model bridge as an object, the temperature field of concrete bridge with curved beam is more than two years. Supportive reaction observation. The temperature field of the bridge was simulated by Abaqus program combined with the thermodynamic parameters of the box girder temperature field. The calculated values agree well with the measured values. Based on the observation data of the temperature field, the temperature and temperature gradient modes of the bridge were determined and compared with the current temperature gradient model. Finally, the temperature gradient effect of the bridge is numerically analyzed. The calculated results show that the calculated results are in good agreement with the calculated backbuffer forces, which verifies the feasibility and reliability of the analytical model.