文学章,蒋林,尚守平.形状不规则筏基在SH波下的动力响应研究[J].湖南大学学报:自然科学版,2014,41(3):14~19
形状不规则筏基在SH波下的动力响应研究
Research on Dynamic Response of Irregularly Shaped Raft Foundation to SH-wave Excitation
  
DOI:
中文关键词:  土-结构动力相互作用  动力响应  不规则形状筏板基础  扭转
英文关键词:soil structure interactions  dynamic response  irregularly shaped raft foundation  torsion
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作者单位
文学章,蒋林,尚守平 (湖南大学 土木工程学院湖南 长沙410082) 
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中文摘要:
      采用薄层元素法,建立了土-筏板基础动力相互作用分析模型,并研究了形状不规则筏板基础在倾斜SH波作用下的动力响应.对平面形状为“L”形和“C”形的刚性筏板基础的动力响应进行了比较分析,结果表明:在倾斜SH波作用下,在一定的频率范围内,随着其入射角的增大以及其频率的增大,基础的水平响应减小,同时还会产生扭转响应.基础的不规则对其水平响应产生较大的影响,由于缺口位置的不同,“L”形基础与“C”形基础表现出不同的变化趋势.基础的不规则对其扭转响应在低频区域的影响较小,而对“C”形基础在高频区域的影响较大.
英文摘要:
      A numerical model for dynamic soil-raft foundation interaction was developed by using the thin layered element method, and the dynamic response of irregularly shaped raft foundation subjected to inclined SH wave excitation was studied. L-shaped foundations and C-shaped foundations were considered. The results have shown that, when subjected to a non-vertically incident SH wave, with the increase of frequency as well as the increase of incident angle, the horizontal response decreases in a certain frequency range. And the torsional response is also generated. The irregularity of raft foundation has a great effect on the horizontal response. The trends are different in L-shaped foundations and C-shaped foundations, due to the different positions of the hole. The effects of the irregularity of raft foundation on the torsional response are very little in low-frequency region, but are great for the C-shaped foundations in high-frequency region.
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