Abstract: Changing?T?beam?into?box?beam?is?a?new?method?to?reinforce?the?bridge?with?T?girder.?To?improve?the?bearing?capacity?of?the?bridge,?the?original?section?is?changed?from?T-section?into?box?section,?through?using?the?high-strength?bolts?and?epoxy?mortar?expansion?paste?plate?in?the?end?of?the?ribs?of?the?T-beam.?This?new?method?makes?good?use?of?anti-bending?ability?and?torsional?rigidity?of?box?beam;?therefore,?it?achieves?the?target?of?improving?the?overall?performance?significantly?comparing?with?the?traditional?T-beam?technology?theory.?This?new?method?is?advantageous?to?reduce?the?eonstruetion?period,?simplify?the?construction?process?and?have?no?traffic?disruption.?A?ease?study?of?T-beam?bridge?reinforcement?is?provided?to?be?referenced.

Key words: reinforcement , paste plate technique , section changing , changing T beam into box beam

摘要： ??T变箱加固梁桥是一种加固T型梁桥的新方法,通过在T梁的肋底采用高强膨胀螺栓和环氧树脂砂浆黏 贴钢板,将原截面由T型截面转变成箱型截面,从而达到提高原桥承载力的目的。以一座T梁桥的加固实例说明 该法很好的利用了箱型梁抗弯、抗扭刚度以及整体性能大大优于T型梁的技术原理,具有节省工期,施工简便且不 中断交通施工等优点。

关键词: 加固, 黏贴钢板法, 截面转换, T变箱