- 摘 要
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（中國五洲工程設(shè)計集團(tuán)有限公司，北京 100053）
［摘要］動力基礎(chǔ)彈性半空間理論將地基假設(shè)為勻質(zhì)彈性體，力學(xué)分析、數(shù)學(xué)運算均非常嚴(yán)密。然而地基土體遠(yuǎn)非勻質(zhì)，理論與實際情況差別較大，須經(jīng)測試對比予以修正；為了便于實用計算，在理論計算上作簡化，將半空間等效于單、雙自由度的集總體系，但與實際情況亦有所差別，故可將動力基礎(chǔ)彈性半空間理論的計算視作半理論半經(jīng)驗。將半空間等效之后，最大優(yōu)點是考慮了振波能量在傳播中消耗及產(chǎn)生的輻射阻尼，大大提高了地基阻尼比，經(jīng)濟(jì)效益顯著。
［關(guān)鍵詞］彈性半空間理論； 實用化分析； 半理論半經(jīng)驗； 輻射阻尼
中圖分類號：TU435文獻(xiàn)標(biāo)識碼：A文章編號：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
作者簡介：吳邦達(dá),教授級高級工程師, Email: wubangda@sina.com。
