李正英1  林文修2  郑硕才1  段成禄2
    （1 重庆大学土木工程学院  400045； 2 重庆建筑科学研究院  400015）

[提要]  通过对18m跨雁形板用体外预应力筋加固前后的静载试验，分析研究了体外预应力加固雁形板这种薄壁板梁组合体系加固前后的受力性能及力学性能指标改善情况，得出体外预应力钢筋对提高梁受力性能的贡献。在此基础上，考虑不同布筋形式对加固效果的影响，寻求合理的加固方法，以满足实际工程需要。
[关键词]  体外预应力  雁形板  试验研究  比拟梁法

By means of static loading and destruction test on tw0 18m span bird-shape plates before and after strengthening with external prestresslng, the mechanical property of the strengthened plate is analyzed, and the capability of improving the property of the bird-shape plate is obtained.  The influence of different reinforcement method is studied, and the experimental results indicate that the curved line-shape tendon is superior to the straight line-shape tendon. These results are useful in the practical engineering.
Keywords:  external prestressing; bird-shape plate; experimental research; analogous beam method; strengthening