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以浙江省境内某半穿式钢桁架连续梁桥为研究对象,针对该桥的结构形式和施工特点,采用空间有限元计算方法,建立桥梁施工阶段模型,进行结构稳定性计算分析,同时结合对主要桁架杆件偏位、挠度、应力等施工控制参数的计算,给出了桥梁在施工过程中各个阶段结构稳定安全度精确分析结果,提出了确保施工阶段结构稳定安全的控制措施。
Taking a half-penetrated steel truss continuous girder bridge in Zhejiang Province as the research object, aiming at the structural form and construction characteristics of the bridge, the finite element method was used to establish the bridge construction phase model, and the structural stability analysis was carried out. The calculation of the construction control parameters such as deflection, deflection and stress of the main truss members gives the precise analysis results of the structural stability and safety of the bridges at all stages of the construction process, and puts forward the control measures to ensure the structural stability and safety during the construction phase.