四方台松花江大桥索塔锚固区环向应力分析与试验

Experiment and Analysis of Annular Pre-stressed Steel Bundles on Cable Tower Anchor Segments of Sifangtai Songhuajiang River Large Bridge

通过索塔锚固区节段足尺模型试验结果和有限元仿真分析比较,结合索塔受力的实际工况,对异型截面斜拉桥索塔锚固区节段最不利断面在环向预应力与索力共同作用下塔壁的应力响应进行了研究。给出了塔壁特征点处的应力值,为异型截面索塔的设计优化与理论分析模型的建立提出了有效的方法。

Stress response of the tower wall at the least favorable section of all of the single section on the cable tower anchor segments of the cable-stayed bridge was studied under the annular pre-stress with cable force and tensile force by comparing the experiment results of the full-scale model of segment with the results of the finite element simulation analysis according to the forced status of the cable tower under practical conditions. Stress value of the characteristic spot on the tower was supplied, and some effective methods were put forward for optimizing the design of the single section cable tower and the establishment of the analytical model in theory.