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本文回顾了预应力及钢筋混凝土桥梁考虑周围温度荷载影响的现状。讨论限于太阳照射于桥面产生的垂直温度梯度。论述了根据当地气象条件预测设计温度梯度的方法,并提出了计算温度应力垂直分布的通用分析方法。实验室及现场试验证实了这种分析方法的有效性。
This paper reviews the current status of prestressed and reinforced concrete bridges considering the effects of ambient temperature loads. The discussion is limited to the vertical temperature gradient created by the sun’s exposure to the bridge deck. The method of predicting the temperature gradient according to the local meteorological conditions is discussed, and a general analysis method for calculating the vertical distribution of temperature stress is put forward. Laboratory and field tests confirm the effectiveness of this method.