噪声与振动控制2018，Vol.38Issue(z1)：547-550,4.DOI:10.3969/j.issn.1006-1355.2018.Z1.118
预应力混凝土T梁桥长期监测数据分析
Analysis of a Prestressed Concrete T-shaped Girder based on Long-term Monitoring
齐怀展 1何立忠1
作者信息
- 1. 天津市交通科学研究院 桥梁结构安全与耐久性国家实验室,天津 300300
- 折叠
摘要
Abstract
The vertical and transverse cracks are not allowed for fully prestressed and class A prestressed concrete beams. In order to evaluate the safety performance of a highway bridge, a vibrating wire sensor system was used for long-term online monitoring of the deflection, strain and crack width of a prestressed concrete T-shaped beam bridge. Combined with the bridge load test, the long-term monitoring data was quantitatively analyzed. The results show that under actual operating conditions, the ratio of the maximum deflection to the span of the girder is less than 1/3 000, and the strain increment due to seasonal temperature variation is equivalent to the increment of vehicle’s load. The width of the transverse crack at the bottom of the beam is stable. The research results can provide a technical support for the maintenance of bridges.关键词
振动与波/预应力混凝土桥/力学分析/长期监测/T梁Key words
vibration and wave/prestressed concrete bridge/mechanics analysis/long-term monitoring/T-shaped girder分类
交通工程引用本文复制引用
齐怀展,何立忠..预应力混凝土T梁桥长期监测数据分析[J].噪声与振动控制,2018,38(z1):547-550,4.
