箱梁边腹板温度梯度影响分析

桥梁箱梁结构在温度荷载作用下会产生温度应力,对该应力的研究通常集中于整体升降温和桥面顶板的温度应力,而对于边腹板的温度应力仍需进一步研究。结合工程实例,对边腹板温度梯度所引起的箱梁应力与自重、桥面顶板温度梯度引起的应力进行比较分析,从而得出在保证结构安全方面,预应力结构能更有效地应对温度梯度的结论。

Analysis on Influence of Temperature Gradient on Edge Web of Box Girder

The temperature stress of the bridge box girder structure will be generated under temperature load.The study of this stress is usually focused on the overall temperature rise and drop,and the temperature stress of the bridge deck roof.The temperature stress of the edge web is still to be further studied.Combined with an engineering example,the stress of the box girder caused by the temperature gradient of the edge web is analyzed and compared with the dead weight and the stress caused by the temperature gradient of the bridge deck roof.It is concluded that the prestressed structure can response more effectively to the temperature gradient in terms of ensuring structural safety.