| 大跨度PC连续刚构桥合拢施工措施 |
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| 引用本文： | 周舟,苏智,颜东煌,郭志远.大跨度PC连续刚构桥合拢施工措施[J].长沙理工大学学报(自然科学版),2006,3(4):39-42. |
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| 作者姓名： | 周舟 苏智 颜东煌 郭志远 |
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| 作者单位： | 长沙理工大学,桥梁与结构工程学院,湖南,长沙,410076 |
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| 摘 要： | 连续刚构桥一般都做成超静定的结构形式,因此砼收缩、徐变和温度变化等因素都会在结构内产生附加内力,因此对结构产生不利影响.介绍了大跨度预应力混凝土连续刚构桥减少营运期砼收缩徐变的新的合拢施工措施———主跨静置4个月后合拢,并用理论计算分析了该种合拢方式与常规合拢方式之间徐变影响的不同,为连续刚构桥的徐变控制提供了科学依据.
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| 关 键 词： | 预应力混凝土连续刚构桥 收缩 徐变 合拢 |
| 文章编号： | 1672-9331（2006）04-0039-04 |
| 收稿时间： | 2006-07-03 |
| 修稿时间： | 2006年7月3日 |
A closure method of the large span PC concrete continuous rigid frame bridge |
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| ZHOU Zhou,SU Zhi,YAN Dong-huang,GUO Zhi-yuan.A closure method of the large span PC concrete continuous rigid frame bridge[J].Journal of Changsha University of Science and Technology:Natural Science,2006,3(4):39-42. |
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| Authors: | ZHOU Zhou SU Zhi YAN Dong-huang GUO Zhi-yuan |
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| Institution: | College of Bridge and Structure Engineering, Changsha University of Science and Technology, Changsha 410076, China |
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| Abstract: | The rigid frame bridges are all constructed in the super-static style in general,therefore the factors of concrete contraction,creep,temperature change and so on can create extra innerforce in the structure,and will have the adverse effect on the structure.More attentions should be paid during designing and constructing a bridge.In this paper,a new closure method is introduced to reduce concrete contraction and creep during the construction period of the large span PC concrete continuous rigid frame bridge,the main span is folded after being placed for four months.Meanwhile,the differences of the creep effects between the new closure method and the general one are calculated and analyzed theoretically. |
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| Keywords: | PC concrete continuous rigid frame bridge shrinkage creep closure |
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