【摘要】 为避免结构物与场地地基的共振效应,基于传统波速法、一致质量矩阵剪切质点系法及剪切梁法的基本原理,分析和比较了各方法计算场地自振频率的计算精度和影响因素.结果表明:传统波速法不能反映土层剖面结构特征的影响,而且仅在土层剖面在深度方向较为对称的情况下才能获得工程可接受的精度;一致质量矩阵剪切质点系法则表现出计算稳定、精度高的特点,且作为一种离散方法,具有良好的计算适应性和灵活性.更多还原

【Abstract】 In order to avoid the resonance between structure and ground,the natural frequency of engineering establishments should be different from that of ground.On the basis of fundamental principles of traditional wave velocity method,shear particle method with consistent mass and shear beam method,the computational accuracy and influence factor for above different methods are analyzed and compared.Computing results show that the traditional wave velocity method can’t response the influence of the soil profile structure and has relatively satisfactory accuracy only in relatively symmetrical profile condition.Comparatively,shear particle method with consistent mass shows characteristics of computational stability and high accuracy and as a discrete method,has good computing adaptability and flexibility.更多还原