Experimental Research on Flexural Performance of Integral Grilles for New-Type Grille Composite Formworks
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摘要: 新型格栅组合模架由整体式铝合金格栅、塑料模板及可调支撑等组成。以该组合模架中的整体式铝合金格栅为对象,对其在竖向均布荷载作用下的受弯性能进行了试验研究与有限元分析。结果表明:格栅受弯的变形与应力试验数据及有限元计算结果基本吻合,以此确定了该格栅的应用范围,即适用于厚度在350 mm以内的混凝土楼板支模施工,其最大承受荷载为8.79 kN/m2,且由次楞刚度控制。在此基础上,根据格栅受力特点,提出了便于应用且安全可行的简化计算方法,该方法可快捷评估格栅的受力状态。Abstract: The new-type grille composite formwork is composed of integral aluminum alloy grilles, plastic templates and adjustable supports. Taking the integral aluminum alloy grille as the object, experimental study and finite element analysis of its flexural performance were carried out under vertical uniformly distributed loads. The results showed that the bending deformation and stress test data of the grille were basically consistent with the finite element calculation results, so the application scope of the grille was determined, that is, it would be suitable for the formwork construction of the concrete floor with thickness less than 350 mm. Its maximum bearing load was 8.79 kN/m2, which was controlled by the secondary ridge stiffness. On this basis, according to the force characteristics of the grille, a simplified calculation method, which is easy to apply, safe and feasible, was proposed. This method could quickly evaluate the force state of the grille.
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Key words:
- grille /
- mechanical properties /
- experiment /
- simplified method
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