不同张拉顺序下的斜拉桥施工索力分析

Cable force analysis of cable-stayed bridges under different tension sequences

在斜拉桥施工中,因施工条件有限导致拉索张拉顺序的改变,其施工索力也随之改变。通过差值法分析西北高原上某独塔非对称斜拉桥,比较不同张拉顺序下拉索的施工索力,结果表明:改变张拉顺序后,对一张力影响较小,对二张力影响较大,对实际工程有一定参考意义。

In the construction of cable-stayed bridges,due to the limited construction conditions,the tensioning sequence of the cable changes,and the construction cable force also changes. Through the difference method,a single tower asymmetric crossstayed bridge on the northwestern plateau of China is analyzed to compare the cable tension of the tension cables in different sequences. The results show that after changing the tension sequence,the cable tension of the first tension construction is less affected,the impact on the cable tension of the second tension construction is large. There are certain reference significance to practical engineering.