【摘要】 利用拟夹层板法对矩形正交正放类平板网架进行竖向振动分析,包括固有振动分析和竖向地震作用下的反应谱分析,并将计算结果与有限元法计算结果进行对比,表明拟夹层板法作为一种简化的计算方法,同样适用于矩形平板网架结构,且精度较高,固有振动分析的基频误差在±4%以内,竖向地震作用下反应谱分析的误差多在±10%以内,可以满足工程需要.更多还原

【Abstract】 Equivalent sandwich plate method (ESPM) is a simplified method for double-layer space grids in which space grids structure is assumed as orthogonal and ortho-laid plate and analyzed by the theory of plate with consideration of shear deformation and three generalized displacement. However, the accuracy of ESPM used to analyze rectangular space grids needs to be further validated. In this paper the vertical vibration of rectangular orthogonal and ortho-laid space grids which includes nature vibration analysis and response spectrum analysis under vertical seismic action is analyzed by ESPM. Then the results will be further validated by finite element method (FEM). Comparing these results of two methods shows that ESPM, as a simplified method, is suitable for rectangle space grids, whose errors are in the allowed range for engineering structure. The errors of primary frequency for nature vibration analysis are all within the ±4% and for seismic internal force less than ±10%.更多还原