某梁拱组合体系吊杆内力变化实测与分析

Actual Measurement and Analysis on Internal Force Variation of Suspender in a Beam-Arch Combination System

某梁拱组合桥在开通运营的3年时间内即发现吊杆索力偏离设计索力较大,且主梁不同部位伴有裂纹产生的现象。在桥梁现状检查和分析的基础上,结合第三方数次对桥梁进行检查测试的情况,对吊杆内力及其时程变化进行理论分析,并与实测吊杆内力进行比较,进而对类似桥梁的分段施工和运营维护提出合理的参考建议。

A beam-arch combination bridge has been put into operation for three years, and in the meantime, the cracks were found in different parts of the main beam, and the values of internal forces of the suspender had deviated from the design values. In this article, based on the checking and analysis on the practical situation of this bridge structure, and combined with the cases of this bridge structure inspected and tested several times by the third party, the internal forces and time-history variations of the suspender are analyzed theoretically, and then the theoretical analysis results are compared with the actually measured internal forces of the suspenders, so as to provide a reasonable reference for the segmental construction and operation maintenance of the similar bridge.