Development of technology for constructing finite element models of ground for seismic response analysis

抄録

A technology was proposed to construct Grid Ground Model, which is a general-purpose mediation model using ground information such as borehole data and soil test results. By building a common data structure once, flexible data manipulation can be performed. In existing study, the authors developed a model building function based on this technique that can be used for more advanced applications, including finite element code, by providing a high level of generality in material parameters setting and geometry processing. In this study, two functions were developed to enable the use of this technology for seismic response analysis. The first is a function to automatically construct a model of ground around the target area for use in lateral boundary conditions. The second is a function to input seismic wave data to the bottom of the model. With these functions, input data for seismic response analysis with boundary conditions can be obtained immediately based on ground and seismic data. When a simple model for seismic response analysis of the FEA software DACSAR-I is constructed using the developed technology, it was confirmed that the man-hours required could be reduced to about 1/50 of those required in constructing the model by Excel. The developed technology is useful for constructing FEA models for earthquake damage estimation and seismic design of construction works.