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预应力混凝土箱梁桥腹板局部应力监测与分析

Monitoring and Analysis of Web Partial Stress on Prestress Concrete Box Girder Bridge
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摘要 而大量箱梁桥在建阶段和使用阶段便在腹板上产生较多的斜裂缝,这些裂缝的存在对结构产生了十分不利的影响。以某在建大桥为背景,针对大桥腹板出现斜裂缝后,在后期施工块中添加防崩钢筋,对预定测点进行现场应力监测与有限元分析,以了解腹板局部应力的变化,给出相应的设计建议,可供同类问题参考。 The box-beam bridge which has many advantages is quite a common one in Chinese highway bridges. However, a large number of box-beam bridges, only in the under-construction or use stage, have already generated many oblique cracks on the web, which has quite a negative impact on the structure. Taking a under-construction bridge as engineering background, the anti bar is added in the following construction block aiming at the oblique cracks on the web. The on-site stress monitoring and finite element analysis are done to the predetermined measuring points, in order to know the change of the stress in the web and give the appropriate design proposals, which provides the reference for similar engineering.
作者 朱伟清
出处 《建筑监督检测与造价》 2015年第3期26-28,共3页 Supervision Test and Cost of Construction
关键词 箱梁桥 腹板斜裂缝 应力监测 有限元分析 box beam bridge oblique cracks of web stress monitoring finite element analysis
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