基于薄层分析的反应位移法研究

介绍薄层单元分析法结合容积法求解半无限空间层状地层中地下结构水平、回转、垂直及轴向的地层阻抗函数过程,并将地层阻抗函数运用到地下结构抗震设计方法-反应位移法中,综合考虑地下结构水平、回转、垂直运动特性,较大程度上提高了反应位移法的计算精度.在北京地区典型地质条件下的典型地铁车站结构模型振动台试验的基础上,进行一般反应位移法及基于薄层分析的反应位移法的计算分析,并将其内力及变形值与一般反应位移法及振动台试验结果进行比对.结果表明,该方法与地铁车站结构振动台的试验结果符合良好,验证了这种基于薄层分析的反应位移法的适用性.

Displacement Response Method Based on Thin Layer Method

This paper introduces the calculation procedure of impedance function of stratified soil with underground structures through thin layer method(TLM) combining flexible volume method,which is applied to displacement response method.Horizontal,vertical and rotating motion characteristics are considered,and its calculation accuracy is improved significantly.Based on the shaking table test of typical subway station in Beijing,general displacement response method and displacement response method based on TLM are used to analyze the stress and deformation of the subway station.Then,the stress and deformation values of the subway station calculated by general displacement response method and displacement response method based on TLM are compared with those of shaking table tests.Results show that displacement response method based on TLM agrees well with the shaking table test of subway station,and its applicability can be verified.