摘要
本文对美国《基础工程手册》中推荐的块式埋置基础地基刚度和阻尼比的计算公式和我国《动力机器基础设计规范》(GB 50040—96)中的相关规定和公式进行了对比分析。求得两种方法对应的块式埋置基础地基刚度和阻尼比的提高系数,并进行对比分析。对比分析表明,块式埋置基础的地基刚度和阻尼比不仅与基础埋置比相关而且还受激振频率的影响。分析结果可供分析土-结构动力相互作用时参考。
In this paper, two methods of evaluating the effects of embedment on stiffness and damping ratio of subsoil for embedded block foundations were compared. One method was presented in Foundation Engineering Handbook of USA, and the other method was included in Code for design of dynamic machine foundation （ GB 50040-96）. Embedment amplification factor of stiffness and damping ratio were compared for both methods to evaluate the effects of embedment on stiffness and damping ratio of embedded block foundations. The results of comparison between the two methods show that the stiffness and damping ratio are not only affected by embedment but also significantly influenced by the vibration frequency. The results could be referred in dynamic response analysis considering the soil-structure interaction.
出处
《结构工程师》
2008年第3期107-112,共6页
Structural Engineers
关键词
块式埋置基础
地基刚度
地基阻尼比
提高系数
embedded block foundation, stiffness of subsoil, damping ratio of subsoil, amplification factor
