墩顶横隔板对连续刚构箱梁顶板力学性能的影响

为增强箱梁结构顺桥向的抗弯刚度和横向抗扭刚度,一般都在墩顶和跨中设置横隔板,但横隔板对附近区段箱梁的受力性能是否有不可忽略的影响,这是通常设计中未曾清晰认识的问题.现以某大桥墩顶附近顶板开裂这一情况为例,具体分析墩顶横隔板对顶板力学性能的影响.结果表明顶板的受力情况在横隔板附近与远离横隔板的区域存在明显差异.

Influences of Diaphragm at the Root of Pier on the Behaviors of Roof-board

Generally a diaphragm is set between the roof of the pier and the mid-span in order to enhance the rigidity refers to the bend-resistance of the box-beam structure in the same direction with the bridge and the twist-resistance crosswise.However,near the diaphragm section,the difference of strength function is obvious comparing to the convention section,which is usually be ignored during the design process.Taking the roof-board crack near the pier of a bridge for example,the diaphragm's influences on the mechanics function of the roof-board are analyzed specifically.The results show that the strength situation is obviously different between the roof-board around the diaphragm and those section far away from it.