施工过程中高铁连续梁桥日照温差效应分析

Analysis of Solar Temperature Effect on Continuous Beam Railway Bridge Construction

高速铁路连续梁桥的日照温差效应在工程设计与施工中不可忽视。在杭甬客运专线某连续梁桥施工过程中,对箱梁结构进行了现场24h温度观测。将实测的温度应力值与采用各国桥梁规范中5种不同的温度梯度模式下的有限元计算分析值进行对比,研究预应力混凝土连续梁桥在施工过程中,的温度效应问题,得出有益于温度效应分析的结论。

The temperature range effect of continuous bridge caused by solar radiation could not be ignored in the processes of design and construction. To analyze the tem- perature effect on the construction of pre-stressed concrete continuous bridge, a 24-hour observation is carried out on the box beams in the construct of continuous bridge on Hang-Yong Passenger Special Line. Finally, the measured stress-value is compared with the finite element analysis value, which is calculated under the temperature gradient from five different domestic and foreign bridge specifications. The result indicates that the finite element measure agrees with the practical fact, thus some valuable conclusions about the temperature effect have been proved.