有限单元法在首都圈地区跨断层水准测量监测能力初步评价中的应用

Abstract

Abstract: With the purpose of establishing more effective cross-fault leveling station, we established three-dimensional finite element models that involve different fault angles and vertical inhomogeneity to study the impact patterns of fault dip and strike on cross-fault leveling monitoring, using the twenty-four cross-fault leveling stations scattered over different faults in the capital area as research objects. Based on cross-leveling data analysis, earthquake case study, and R-value assessment, we carried out preliminary evaluation of cross-fault level monitoring effectiveness in capital area. Result from finite element modeling, earthquake case study, R-value assessment show that: ① the monitoring effectiveness of cross-fault leveling are affected by both fault dip and strike; ② the station located across fault with dip between 30°~70° and strike perpendicular to crustal general motion has relatively stronger monitoring effectiveness in terms of earthquake prediction; ③ the cross-fault leveling in the capital area possesses satisfactory monitoring capacity in general.

Key words: Cross-fault leveling, Finite element method, Earthquake cases, Prediction effectiveness, Capital area

CLC Number:

P315.7

HE Ping, LI Zhi-xiong, LU Yuan-zhong, SHAO Zhi-gang. Application of 3D Finite Element Numerical Simulation in Preliminary Evaluation of Cross-fault Leveling Monitoring Capacity in the Capital Area[J]. EARTHQUAKE, 2010, 30(2): 89-99.

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Application of 3D Finite Element Numerical Simulation in Preliminary Evaluation of Cross-fault Leveling Monitoring Capacity in the Capital Area

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