（中国五洲工程设计集团有限公司，北京 100053）

［摘要］动力基础弹性半空间理论将地基假设为匀质弹性体，力学分析、数学运算均非常严密。然而地基土体远非匀质，理论与实际情况差别较大，须经测试对比予以修正；为了便于实用计算，在理论计算上作简化，将半空间等效于单、双自由度的集总体系，但与实际情况亦有所差别，故可将动力基础弹性半空间理论的计算视作半理论半经验。将半空间等效之后，最大优点是考虑了振波能量在传播中消耗及产生的辐射阻尼，大大提高了地基阻尼比，经济效益显著。

［关键词］弹性半空间理论； 实用化分析； 半理论半经验； 辐射阻尼

中图分类号：TU435文献标识码：A文章编号：1002-848X(2019)12-0129-05

Practical analysis of elastic half-space theory for dynamic foundation

Wu Bangda

(China Wuzhou Engineering Group Co.,Ltd, Beijing 100053, China)

Abstract:The elastic half-space theory of dynamic foundation assumes that the foundation is a homogeneous elastic body, and the mechanical analysis and mathematical calculation are very strict. However, the foundation soil is far from homogeneous, and the difference between theory and practice is great, so it needs to be revised by test and comparison. In order to facilitate practical calculation, the theoretical calculation was simplified, and the half-space was equivalent to the set system of single and double degrees of freedom, but it was also different from the actual situation. Therefore, the calculation of elastic half-space theory of dynamic foundation could be regarded as semi-theoretical and semi-empirical. After half-space was equivalent, the greatest advantage is that the energy consumption of vibration wave and the radiation damping produced in the propagation were considered, which greatly improved the foundation damping ratio and had remarkable economic benefits.

Keywords:elastic half-space theory; practical analysis; semi-theoretical and semi-empirical; radiation damping

作者简介：吴邦达,教授级高级工程师, Email: wubangda@sina.com。