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混凝土桥梁因太阳辐射和气温变化所引起的温度应力,影响颇大,而目前桥梁设计规范对于气候的昼夜变化所引起桥梁内部的温度分布和温度应力的计算尚乏规定。在桥梁设计中,多引用半无限厚壁结构受一侧谐波热作用时的指数曲线方程T_x=T_0·e~((-x)((ω/2a)~(1/2)))以确定混凝土结构内部温度变化规律,并据以计算温度应力和配筋。T_0为结构外表面点相对于内部的温差,该值须根
Concrete bridges due to solar radiation and temperature changes caused by temperature stress quite influential, and the current bridge design norms for the diurnal changes in the climate caused by the bridge within the temperature distribution and temperature stress calculation is still not provided. In the bridge design, the exponential curve equation T_x = T_0 · e ~ ((-x) ((ω / 2a) ~ (1/2))) of the multi-reference semi-infinite thick- Determine the internal structure of concrete temperature changes, and based on the calculation of temperature stress and reinforcement. T_0 is the temperature difference between the outer surface and the inner surface of the structure, the value of the root