Abstract:To investigate the crustal strain state of the regional geological structure, we construct a digital three-dimensional terrain model using digital elevation model(DEM) data, and we establish a three-dimensional geological model with regional geological rock properties by adding finite element analysis. We apply gravity and thermal loads to conduct finite element and measured strain analysis. Taking the Jiujang Seismic Station as an example, we use finite element modeling and station-measured temperature and strain data to carry out regional strain analysis. The results show that the strain calculation results of finite element modeling are consistent with the measured strain, and the average order of magnitude is 10-5, which shows an obvious seasonal periodic change trend. The model’s thermal strain and directional strain reflects the strain differences caused by temperature and the changes in strain in different directions. The model strain can to some extent reflect the range and magnitude of regional strain changes, which is beneficial to the strain analysis of regions with no measured strain conditions.
LI Meng,LU Hexiong,ZHAO Aiping et al. Finite Element Modeling and Measured Strain Analysis: A Case Study of Jiujiang Seismic Station[J]. jgg, 2023, 43(10): 1063-1067.