摘要
本文基于弹性半空间理论及所采用的动力分析模型,由结构-地基体系的特征方程出发,推导出结构-地基体系的Dunkerley-Southwell公式。它克服了原来Dunker-ley-Southwell公式的局限性,考虑到结构基础埋置深度、基础转动惯量、基础质量及平移-旋转运动的耦合效应等因素,能更合理地反映结构-地基体系的工程实际。本文公式尚可推广应用于结构-桩-地基体系基频的计算。该公式不仅计算简捷,且计算结果具有较高精度。
In this paper based on the theory of elastic half-space and dynamic analyticalmodel, a generalized Dunkerley-Southwell's formula is derived from the charac-teristic equation of structure-foundation system. The formula presented hasthe advantages of overcoming the limitations of the available Dunkerley-South-well's formula as well as taking into account the effect of foundation embed-ment, mass and rotational inertia of foundation, and coupling effect of trans-lation-rocking motion. This leads to more rational estimation of foundamen-tal frequencies considering practical situations in engineering design. This for-mula can be extended to estimate the fundamental frequencies of structure-pile-foundation systems. The formala is simple and convenient in calculation andsatisfactory results of fundamental frequencies with high degree of accuracycan be obtained
出处
《土木工程学报》
EI
CSCD
北大核心
1989年第4期73-78,共6页
China Civil Engineering Journal
