大跨连续梁临时锚固设计与仿真分析

Analysis of Large-span Continuous Beam Temporary Anchorage Design and Simulation

在大跨预应力混凝土连续梁悬臂浇筑施工中,需对梁体采取临时固结措施以保证梁体在施工期间结构的稳定和安全。目前大多数工程均采用结构力学方法进行手算反力,进而确定临时固结体系的强度和稳定,但墩顶临时固结部位的局部受力十分复杂,属于混凝土构件的应力扰动区(D区),为更好地了解施工状态下该部位混凝土的应力状态,有必要建立三维实体模型进行局部仿真分析,为该类工程的设计计算提供参考。

During cantilever cast in construction of large - span prestressed concrete continuous beam, temporary consolidation measures need to be taken to ensure the stability and security of the beam structures. Most projects carried out manual calculation reacting force by the method of structural mechanics, to determine the strength and stability of the temporary consolidation system. But local stress of pier top temporary consolidation is very complex, which belongs to stress disturbed zone （ D zone） of concrete members. In order to better understand the site~ concrete stress state at the construction, it is necessary to establish three - dimensional solid model to carry out partial simulation analysis, to provide reference for the design and calculation of such projects.