论文部分内容阅读
采用非线性土层平稳随机地震反应分析的等价线性化方法 ,运用半无限长剪切梁上剪切型多质点系地震反应分析的 Fourier变换分析方法 ,结合自由场地地表处测得的地震加速度记录反演分析了非线性成层地基基岩的地震运动 ,并编制了相应的分析程序。用随机地震概率描述方法来求解考虑土层非线性特性所需的等效参数 ,在地基及土石坝等大型上部结构的抗震设计计算中向动力可靠设计方向发展 ,避免了在采用等价线性化法进行近似计算时 ,引入限制条件过多 ,分析繁杂 ,难以实现应用的缺点。根据杭州某自由场地实际地质情况反演分析了该场地基岩的地震运动 ,数值结果表明了反演分析的必要性和方法的正确性
Using the equivalent linearization method of nonlinear stochastic seismic response analysis of nonlinear soil, using the Fourier transform analysis method of seismic response analysis of shear-type multi-point shear on semi-infinite shear beams, combined with the seismic acceleration measured at the surface of free ground The inversion of records is used to analyze the seismic motion of bedrock with nonlinear stratification, and the corresponding analysis program is compiled. The method of stochastic seismic probability is used to solve the equivalent parameters for considering the nonlinear characteristics of soil. It is developed to the design of reliable power in the design of seismic design of large superstructure such as foundations and earth-rock dams, avoiding the use of equivalent linearization When the method is used for approximate calculation, the introduction of too many restrictive conditions and complicated analysis makes it difficult to realize the shortcomings of the application. According to the actual geology of a free field in Hangzhou, the seismic motion of bedrock in this field is analyzed inversely. The numerical results show the necessity of inversion analysis and the correctness of the method