摘要
为了研究塔底铰接型独塔斜拉桥施工阶段的力学行为,通过有限元软件建立空间梁格的数值模型,研究了该结构在各个施工阶段桥塔、主梁的位移、内力和应力变化情况,并对塔底铰接和固结两种设计方案的整体力学行为进行对比分析。结果表明:桥塔最大弯矩位置随着施工阶段不同斜拉索的张拉而发生改变;张拉主梁拉索时,主梁曲率半径外侧受拉,内侧受压;塔底铰接对结构整体受力更加有利。可见塔底铰接型独塔斜拉桥与常规斜拉桥施工阶段的力学行为不同,研究结论可以为未来类似结构的设计、施工和监控提供参考。
To study the mechanical characteristics of the pylon-hinged single-pylon cable-stayed bridge during construction,a numerical model of the spatial beam was established by finite element software,and the displacement,internal force,and stress of the pylon and super structure were calculated.The overall mechanical behavior of the two design schemes with hinge and consolidation of pylons was compared and analyzed.The results show that the maximum bending moment position of the pylon changes with the tension of different stay cables during the construction phase.When the superstructure is tensioned,the outer side of radius of curvature superstructure is tensioned outside and the inner side was compressed;the root of the pylon was hinged to the structure,under which the overall force is more favorable.It can be seen that the mechanical behavior of the pylon-hinged single-pylon cable-stayed bridge is different from that of the conventional cable-stayed bridge.Therefore,the outcome of such a research can provide valuable reference for the design,construction,and monitoring of similar structures in the future.
作者
周勇军
田瑞欣
吴领领
赵煜
ZHOU Yong-jun;TIAN Rui-xin;WU Ling-ling;ZHAO Yu(School of Highway,Chang an University,Xi an 710064,China)
出处
《科学技术与工程》
北大核心
2020年第21期8785-8790,共6页
Science Technology and Engineering
基金
国家自然科学基金(51678061)
长安大学重点科研平台开放项目(310821171121)
中央高校基本科研业务费(300102210511)。
关键词
桥梁工程
独塔斜拉桥
有限元分析
施工过程
塔底铰接
bridge engineering
single-pylon cable-stayed bridge
finite element analysis
construction process
pylon-hinged
