施工周期对连续刚构桥服役线形的影响分析

Effect of Stage Construction Period on Servicr Alignment of Continuous Rigid Frame Bridge

以160m跨预应力混凝土连续刚构桥为例,分析阶段施工周期对混凝土徐变系数的影响及徐变系数对预应力损失和桥梁服役期线形的影响。结果表明:缩短施工周期混凝土结构桥梁徐变影响明显,增大连续刚构桥服役期跨中下挠。

Taking the 160 meter span prestressed concrete continuous rigid frame bridge as an example,this paper analyzed the influence of the construction period on the creep coefficient of concrete and the influence of creep coefficient on the prestress loss and the alignment of the bridge.The results showed that shortening the construction period of concrete structure bridge creep effect was obvious,increase the continuous rigid frame bridge during the service span.