大跨径桥梁施工控制温度应力研究

针对大跨径桥梁施工控制中温度变化能导致的结构内力的变化和形状的改变,在分析温度应力的内涵及产生原因的基础上,提出了温度应力计算的简化处理方法。并通过工程实例分析了温度应力对桥梁施工控制的影响。结果表明:考虑温度影响的理论值与实测应力值接近,为工程应用提供了理论依据。

Research on temperature stress in construction control of long-span bridge

Temperature distribution and Temperature stress calculation for prestressed concrete box girders are discussed in this paper. The change of temperature can lead to the change of the internal forces and the alteration of shape in the construction control of the long - span bridge, based on analysis on the connotation and the causes for temperature stress, a simplified calculation method for temperature stress has been put forward, The influence to the construction of bridges produced by the temperature stress have been studied through analysis on the actual examples. The result shows that the theoretical values approach to the actual value obtained from test when the temperature is considered, which provides some theoretical reference to the bridge construction.