湖南大学学报（自然科学版）2016，Vol.43Issue(3)：8-14,7.
预制RPC柱降低大跨PC刚构桥跨中长期下挠分析
Analysis of Precast RPC Column on Reducing Long-term Mid-span Deflection of Rigid Frame Bridge
摘要
Abstract
To reduce long-term and excessive mid-span deflections of long-span PC rigid frame bridges, a method of adding precast RPC (reactive powder concrete)columns into the bottom plate of the negative moment region and the mid-span roof of the rigid frame bridge to form RPC-NC (Normal Concrete)com-posite section was proposed.The RPC-NC composite column was analyzed to investigate the influence of RPC on reducing creep and shrinkage effects of the composite column and the stress redistribution between RPC and NC as well as the mechanical capability of shear bond.Based on the above research,design scheme of prefabricated RPC column used in actual bridge was put forward,and then the influence of the precast RPC column on the whole bridge stress and the mid-span deflection was analyzed by finite element method.The results demonstrate that the added precast RPC obviously reduces the rotation of the negative moment region and the compression stress of NC near RPC,which decreases the long-term mid-span de-flection after the construction of the rigid frame bridge by 5 3 .9%.关键词
长期下挠/收缩徐变/活性粉末混凝土/RPC-普通混凝土复合截面/内力重分布Key words
long-term deflection/creep and shrinkage/reactive powder concrete/RPC-NC composite section/internal force redistribution分类
交通工程引用本文复制引用
张阳,鲍超,刘榕..预制RPC柱降低大跨PC刚构桥跨中长期下挠分析[J].湖南大学学报（自然科学版）,2016,43(3):8-14,7.基金项目
国家自然科学基金资助项目（51578226），National Natural Science Foundation of China （51578226）；湖南省交通运输厅科技进步与创新项目（201425）；广东省交通运输厅科技项目 （）
