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移动模架设计阶段考虑到在其行走过程中对桥墩结构产生一定影响,为分析在实际工程中移动模架行走对桥墩结构作用,以泉州湾跨海大桥A5标段秀涂互通主线桥为依托工程,利用FEA软件对桥墩进行仿真模拟,分析由于变截面移动模架自身重量大在行走过程中对桥墩产生推力的效果,得出秀涂互通主线桥右幅墩号B028-B027浇筑工况移动模架荷载墩位最大,局部最大拉应力应力达到0.874MPa,出现在系梁和桥墩结合部位,虽然小于承台混凝土C40的抗拉强度设计值1.65MPa,钢筋应力最大点出现在系梁底部,远小于HRB335级的钢筋的抗拉强度设计值,处在安全的范围之内,为福建省相关工程实际提供参考。但这仅限于桥墩高度小于17m,当桥墩高度大于17m时,需施工过程中应对桥墩的应力和变形进行监测。
In order to analyze the role of the movable formwork walking on the pier structure in the actual project, taking the A5 section of the Quanzhou Bay Sea-Crossing Bridge as an example, , The FEA software was used to simulate the piers, and the effect of thrust on the piers was analyzed as a result of the heavy weight of the variable cross-section moving die. The displacement modulus of the pier B028-B027 The maximum loading stress is 0.874MPa, which appears at the joint of the tie beam and bridge piers. Although the designed value of tensile strength is less than 1.65MPa for C40, the maximum stress point appears at the bottom of tie beam. The design value of tensile strength less than HRB335 grade steel is in the safe range and provides a reference for the related engineering practice in Fujian Province. However, this is limited to the pier height less than 17m. When the pier height is greater than 17m, the stress and deformation of the pier should be monitored during the construction.