构配件缺陷对混凝土浇筑期模板支撑体系受力性能影响

Influence of Defects in Components on Mechanical Performance Analysis of Formwork Support System During Concrete Placement

目的研究混凝土浇筑期内构配件性能缺陷对模板支撑体系受力性能的影响。方法模拟搭建一个扣件式模板支撑体系,利用Python脚本驱动ABAQUS进行随机有限元分析。考虑构配件性能缺陷条件与空间位置分布,分析不同混凝土浇筑路径下的模板支撑体系体系受力性能。结果在加载过程中有性能缺陷的构配件自身承载能力降低,导致周围立杆轴力突增;立杆所受最大轴力值受混凝土浇筑路径的影响较小。结论构配件有性能缺陷会造成部分立杆的实际受力值大于现行规范的要求值,在模板支撑体系的设计和计算中,应当将构配件性能缺陷的不利影响加以充分考虑。

The effect of component components defects on the mechanical performance of a formwork support system during concrete placement is studied.A fastener-type formwork support system was simulated,and ABAQUS was driven by Python programs for random finite element analysis.The mechanical properties of a formwork support system under different concrete placement paths were analyzed with performance defect conditions and component spatial location distribution.In formwork support system,the bearing capacity of the components with performance defects decreases during load loading,and the axial force of the surrounding vertical posts increases abruptly.The maximum axial force of vertical posts is less affected by concrete placement path.Because of component performance defects,the actual force value of some vertical posts will be greater than the current code.The adverse effects of component performance defects should be fully considered in the design and calculation of the formwork support system.