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通过对浙江省2座处于典型气候环境中混凝土连续箱梁温度梯度的长期观测,掌握箱梁温度场和温度梯度的变化和分布规律,验证新规范温度梯度计算模式的合理性,最后通过数值计算方法对箱梁温度梯度分布模式进行了理论分析。结果表明,《公路桥梁设计通用规范》(JTG D60-2004)规定的混凝土箱梁温度梯度计算模式的基本形式和实际相符,但是对内陆地区和海岛地区还存在取值方面的偏差,建议可根据不同气候条件分别取值。
Through the long-term observation of the temperature gradient of two concrete continuous box girders in a typical climate environment in Zhejiang Province and the change and distribution of the temperature and temperature gradient of the box girder, the rationality of the temperature gradient calculation model of the new code is verified. Finally, Methods The temperature gradient distribution model of box girder is theoretically analyzed. The results show that the basic form of the temperature gradient calculation model for concrete box girder provided by JTG D60-2004 is in line with the actual situation, but there still exist some discrepancies in the values for inland areas and island areas. According to different climatic conditions, respectively.