Abstract: Converting simply-support into continuous is the effectual reinforcement measure to improve ultimate bearing capacity of multi-span T shape flee beam bridge But some problem was also found in practice．Take example for reinforcing T shape free beam bridge with double spans(16.76m+16.76m)by using the measure，the result of theoretic analysis and calculation indicates that the bend bearing capacity in the middle of span Was improved，as the same time，the sheer bearing capacity of the continuous end of beam Was reduced.The advice Was advan ced that reinforcing the sheer bearing capacity of the continuous end of beam when the measure Was adopted to improve bend bearing capacity of multi-span T shape simply-support beam bridge．

Key words: reinforcing of old bridge, multi-span T shape free beam bridge, reinforcement measure of converting simply-support into continuous

摘要： 多跨简支T梁变连续加固措施是多跨简支T梁桥加固改造、提高承载能力的行之有效的方法．但实践中 发现该方法存在着一定的问题．以跨径为l6．76m+16．76m的两跨简支T梁为例，通过理论分析计算表明，该 方法在提高跨中抗弯承载能力的同时，却降低了中间支点处梁的抗剪承载能力．建议在采用此方法加固多跨简 支T梁的同时应对中间支点梁的抗剪能力进行加固．

关键词: 旧桥加固, 多跨简支T梁桥：简支变连续加固方法