| One of the important engineering measures adapted to resist the damage of the ground motion is the site’s earthquake response analysis. Also, the result of the earthquake response analysis provides crucial reference frame for resistance protection and improvements of the engineering structures. According to the soil’s dynamic characteristics, analyzes methods to the result of earthquake responses can be divided in two: equivalent linearization and non-linearization. The equivalent linearization is easy to adapt; it’s manipulation and axiom are simple, which enable it to be suitable for the condition of small earthquake results and transverse uniformity. Meanwhile, in the last step of analysis, it adopts the method called "amplifying the low-frequency conversion,magnifying the high-frequency conversion".When handling the response analysis under strong earthquake motions and complicated sites, the accuracy will be influenced. Therefore, there are boundedness in adopting linearization; adopting non-linearization for non-uniform sites is more reasonable. However, in the practical operation, there are lots of parameters,which are influenced by many factors.And it tends to be used in professionals citified researches.In practical engineering projects,it is not prevalent and the non-linearization needs to be studied.According to the results of drilling seismic wave speed testing and site drilling parameters in the earthquake safety assessment, the site earthquake response analysis program is adopted to proceed a great deal of numerical calculation and study to two specific sites. There are the major research contents as follows.1.It sketches out the research background of this project and summarizes the relevant developments, major research methods and current situation in this field at home and abroad.2. It introduces,assess,and discusses several dynamic constitutive models and nonlinear constitutive models which are on a skeleton curve.3.It also focus on analyzing two mature methods’ axiom and the range of application in many response analysis of horizontal layered site. They are adopting analytic methods to analyze one-dimensional site model and adopting semi-analytic methods to analyze the parameters nonlinear soil’s dynamic characteristics and the earthquake response analysis.4. It analyzes detailedly the time-domain analysis which adopts the axiom of lump- mass method in the earthquake response analysis of horizontal layered site. In the specific program MATLAB,it uses Fourier transform to reduce the quantity of calculation and three programs(DENSOR98,SHAKE91,LSSRLI-1) are often adopted in earthquake response. In the seismology, the widely used ones also are the major equivalent linearization program and the method’s developing process. It focuses on introducing the axiom of nonlinear program DEEPSOIL and researching the operational version.5. According to the drilling practical observation result and dynamic parameters of two specific engineering, it uses equivalent linearization to calculate the site earthquake analysis on the ideal soil one-dimensional fluctuation model basis, gains the site peak ground acceleration and response spectrum analysis result, standardizes the ground acceleration average response spectrum curve and gives guage response spectrum curve of this engineering site in ground horizontal direction damping ratio of 5%. And it is adopted to be the scientific basis of technical cohesion of designing the form of response spectrum asked by the Norm.6. It concludes the response analysis models adopted in complicated stratum’s two-dimensional and three-dimensional sites and the advice on the remained problems and the way of carrying out work. |
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