刚架式系杆拱桥施工过程结构稳定性分析

Analysis of Structural Stability for Rigid Frame Tied-Arch Bridge in Construction

刚架式系杆拱桥在施工过程中要经历多次拼装和张拉。因此,施工过程中的结构稳定性常常控制设计。结合工程,对大跨度钢管混凝土系杆拱桥在施工过程中的稳定性进行有限元分析,探讨拱肋横撑等因素对侧向稳定模态和稳定因子的影响。对桥梁施工过程中的稳定性进行评价,并提出增强结构稳定性的措施。

As the rigid frame tied-arch bridge would be assembled and tensioned for multiple times in the construction, and the design often depends on structural stability during the construction course. Introduced hereby are the finite element analysis on stability of large span steel tube reinforced concrete tied-arch bridge in the construction, the discussion on impacts on lateral stability modalities and stability factors exerted by factors such as lateral brace of arch rib etc. Besides, the evaluation on bridge stability in the construction and the measures to strengthen the structural stability are also described here.