齐嫩公路桥大吨位预应力锚下局部承压问题的理论分析及试验研究

Theoretical and Test Research on Anchor Strength under Large Prestressing Anchorage of Qi-Nen Highway Bridge

本文针对齐嫩公路桥的具体情况，从机理分析、规范方法分析、有限元分析及实验分析等多方面对预应力连续薄壁箱梁的腹板在两个大吨位锚具作用下的局压强度和抗裂性进行了论证、计算和实验。并在此基础上提出了改进布锚的建议，确保了该桥施工、运营的安全及耐久性，带来了良好的经济效益。

In this paper, for the practical situation on the Qi-Nen Highway Bridge, annchorage strength and cracking load on the webs of P. C continuous box girders with two large anchorages are demonstrated, calculated and tested based on mechanism, standard method, finite element method and experimental analysis. From the research work, a proposal on rearranging the anchorages is presented, insuring safety and durability of the bridge during construction and operation and bringing a good economic benefit.