复杂随形拱壳混凝土结构施工过程模拟与方案优化

Construction Process Simulation and Scheme Optimization of Complex Profile-followed Arch Shell Concrete Structure

考虑随形拱壳混凝土结构形状复杂、施工过程受力变化大等因素的影响,结合现有混凝土结构施工方案和施工过程数值模拟方法,建立了大型复杂随形拱壳混凝土结构施工阶段模拟的有限元分析模型,有效模拟了大型复杂随形拱壳混凝土结构施工阶段的受力状态。通过计算各阶段模板支撑体系荷载设计值和拱壳结构的内力大小,并调整模板拆卸方式和拱壳上部结构施工次序进行施工方案优化设计。分析结果表明,通过改变逐层模板拆卸方式和拱壳上部结构施工次序,能调控模板支撑体系和拱壳结构受力的状态,优化后的施工方案既能满足模板支撑体系设计要求,又能保证拱壳结构的安全性。

Considering the complex shape of the concrete structure of the profile-followed arch shell and the great change of the stress in the construction process, combined with the existing concrete structure construction scheme and the numerical simulation method of the construction process, the finite element analysis model of the large-scale complex profile-followed arch shell concrete structure in the construction stage is established, which effectively simulates the stress state of the large-scale complex profile-followed arch shell concrete structure in the construction stage. By calculating the load design value of the formwork support system in each stage and the internal force of the arch shell structure, and adjusting the formwork dismantling method and the construction sequence of the upper structure of the arch shell, the construction scheme is optimized. The analysis results show that the stress state of the formwork support system and the arch shell structure can be controlled by changing the layer by layer formwork dismantling method and the construction sequence of the arch shell superstructure. The optimized construction scheme can not only meet the design requirements of the formwork support system, but also ensure the safety of the arch shell structure.