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一、前言 桥上温度的变化有它自身的特性,“桥下有水桥面凉”,说明桥上的温度较桥外温度要低。但是,桥上的温度低多少,气温、轨温和梁温的变化规律如何,是目前扩大桥上无缝线路铺设需要研究的问题之一。 温度的变化,在钢轨及桥梁结构中产生温度应力,影响桥梁结构的受力状态,严重时可使构件产生严重的裂纹,甚至引起结构的破
First, the foreword The change of temperature on the bridge has its own characteristics, “the water bridges under the bridge is cold,” indicating that the bridge temperature is lower than the temperature outside the bridge. However, the low temperature on the bridge, temperature, rail temperature and the law of how the temperature changes, it is one of the problems to be studied in expanding the seamless track laying on the bridge. Temperature changes in the rail and bridge structures produce temperature stress, affecting the bridge structure of the stress state, severe cases can cause severe cracks in the components, and even cause structural damage