半空间上水平层状场地自振频率计算方法比较  

Comparisons of Computing Methods for Natural Frequency of Horizontal Layered Soils on Half Space

作　　者：邓亚虹[1,2,3] 彭建兵[1,2,3] 范文[1,2,3] 孙振峰[3] 薛捷[3] 

机构地区：[1]长安大学西部矿产资源与地质工程教育部重点实验室,西安710054 [2]长安大学国土资源部岩土工程开放研究实验室,西安710054 [3]长安大学地质工程系,西安710054

出　　处：《河南大学学报（自然科学版）》2015年第1期113-116,共4页Journal of Henan University:Natural Science

基　　金：国家自然科学基金项目(41372327);长安大学中央高校基本科研业务专项项目(CHD2010JC098)

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.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.

关 键 词：半空间 水平层状场地 自振频率 计算方法 

分 类 号：TU352.12[建筑科学—结构工程]