The main tower of Changtai Yangtze River Bridge adopts the steel-concrete mixed space diamond shape,the structure is complex and the construction is difficult.In order to explore the structural performance of the lower pylon during construction,the finite element model of the pylon was established by MIDAS/Civil software and the construction of the lower pylon was analyzed.The results show that setting two pull rod can improve the tensile stress at the root of the tower limb during construction.The disconnection of the transverse bridge support is beneficial for its linear control of the lower cross beam;The effective push force of the lower beam of the longitudinal bridge has a linear relationship with the relative displacement of the closing port and the tensile stress at the root of tower limb.The maximum tensile stress of the bracket is 106MPa,and the maximum compressive stress is 125MPa;The on-site measurement results are in good agreement with the theoretical calculation results.
关键词
桥梁工程/斜拉桥/钻石形索塔/下塔柱/有限元分析/施工技术
Key words
bridges/cable stayed bridges/diamond-shaped pylon/lower pylon/finite element analysis/construction
维普
万方数据