考虑整体空间作用的高支模数值分析及试验研究

Numerical Analysis and Experimental Study of High⁃formwork Support System Considering Overall Spatial Action

为保证盘扣式高支模体系施工安全,浇筑混凝土前,通过建立符合现场加载方式的高支模数值模型进行受力模拟,可掌握其受力状态。针对现有高支模数值模型的加载方式与实际施工差异问题,以及高支模浇筑混凝土时的整体空间作用,以青岛市某在建高支模工程为研究对象,使用ANSYS有限元软件建立高支模刚性板模型和弹性板模型进行分析。为验证2个模型的适用性,通过现场试验测得高支模施工期间的立杆轴力和剪刀撑应力,并对比2个模型的数值分析结果与试验值,结果表明,2个模型的计算结果整体均能反映施工中高支模的受力变化趋势,但对跨度较小(10m内)的梁板结构,刚性板模型计算结果与试验值更吻合,而对于跨度较大(30m左右)的梁结构,则弹性板模型计算结果更吻合。分析高支模受力时,根据不同跨度的结构,结合2个模型进行分析,其计算结果更可靠。

In order to ensure the construction safety of the coiled high⁃formwork support system,the force state can be grasped by establishing a numerical model of the high⁃formwork support form,to simulate the force in accordance with the loading method on site before placing concrete.For the problem that the loading mode of the existing numerical model of the high⁃formwork support differs from the actual construction,and considering the overall spatial action of the high⁃formwork support when placing concrete,this paper takes an under⁃construction high⁃formwork support project in Qingdao as the research object,and uses ANSYS finite element software to establish the rigid plate model and elastic plate model of the high⁃formwork support for analysis.In order to verify the applicability of the two models,the results of the numerical analysis of the two models were compared with the experimental values,and the results showed that,the calculation results of the two models as a whole could reflect the trend of the force changes of the high⁃formwork support.However,for beam⁃slab structures with smaller spans(up to 10m),the results of the rigid plate model are more consistent with the test values,while for beam structures with larger spans(around 30m),the results of the elastic plate model are more consistent.When analyzing the force of high⁃formwork support,the calculation results are more reliable by combining the two models according to the different span structures.