泵送混凝土对铝合金模板的冲击

对铝合金模板在泵送混凝土浇筑过程中的非线性冲击响应进行有限元分析，考虑泵送混凝土的黏度和密度、泵送管道的直径、模板的宽度和边界条件、混凝土浇筑位置和初始冲击速度等不同因素的影响。研究结果表明：浇筑过程中泵送混凝土的初始冲击速度对模板的冲击响应影响最大，混凝土黏度的影响较小；提高混凝土的泵送速度、增大泵送管道的管径和模板宽度，模板的冲击响应随之增大；模板边界约束越弱其位移响应越大，但其最大等效应力和最大塑性应变越小。

Impact of pumped concrete on aluminum alloy formwork

The nonlinear dynamic response of aluminum alloy formwork during the pouring of the pumping concrete is analyzed using finite element method. Different parameters are considered, such as the viscosity and density of the pumping concrete, the diameter of pumping pipe, the boundary condition and the width of the formwork, the casting position and initial impact velocity of the pumping concrete. The study results show that the greatest influence on the impact response is the initial impact velocity of the pumping concrete, while the influence of concrete viscosity is little; the impact response on formwork increases with the increase of the pumping velocity and the diameter of pump pipe and the width of the formwork; while the boundary constraint is reduced, the displacement response increases, but the maximum equivalent stress and the maximum plastic strain decrease.