Effect of concrete creep on pre-camber of continuous rigid-frame bridge
The effect of concrete creep on the pre-eamber of a long-span pre-stressed concrete continuous rigid-frame bridge constructed by cantilever casting method was investigated. The difference of creep coefficients calculated with two Chinese codes was discussed. Based on the calculations, the pre-camber of a pre-stressed concrete continuous rigid-frame box bridge was computed for construction control purpose. The results show that the short-term creep coefficient and long-term creep coefficient calculated with the CC-1985 are larger than those calculated with the CC-2004, while the medium-term creep coefficient calculated with the CC-1985 is smaller than that calculated with the CC-2004. The difference of creep deformation calculated with these two codes is small, and the influences of conerete creep on the pre-camber for most of the segments are negligible. The deflections and stresses of the box girder measured during the construction stages agree very well with the predictions.
creep pre-stressed concrete continuous rigid-frame bridge cantilever casting method pre-camber
HE Guo-jing(贺国京) LI Yuan-yuan(李媛媛) ZOU Zhong-quan(邹中权) DUAN Liang-liang(段靓靓)
College of Civil and Architecture and Mechanics, Central South University of Forestry and Technology College of Civil and Architecture and Mechanics, Central South University of Forestry and Technology School of Civil and Architectural Engineering, Central South University, Changsha 410075, China
国际会议
长沙
英文
337-341
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）