广州地区三维地下速度结构模型建立及优化研究
|
摘要
利用广州地区详尽的深、浅部地震勘探资料,大深度钻孔和测速等资料,运用自主开发的建模程序和多功能商业软件的二次开发功能高速处理海量数据进行建模,采用开发的二元三次B-Spline函数建模方法解决大城市圈建模数据空间分布不均匀的问题并进行模型优化,建立了广州地区符合地质学和地形学理论三维不均匀地下速度结构模型,为基于活断层探测和地震动危险性评价基础上的强地震动预测(模拟)奠定了基础。
This paper presents the modeling of underground velocity structure for the target area in Guangzhou region. Based on results and detailed data from Guangzhou Active Faults and Seismic Hazard Assessment Project, such as shallow and deep sections of seismic reflection/ refraction surveys, boring database, velocity exploration and so on, the 3D velocity structure model was set up. Modeling codes and developed tools based on multi-function software were used to analyze the mass data and information. The 2D third order B-spline function was proposed to produce the given data points which are spread widely and randomly in the target area in order to optimize the model. The study provides a scientific basis for evaluating near-fault strong ground motions from future earthquakes to mitigate earthquake damages in urban areas.
This paper presents the modeling of underground velocity structure for the target area in Guangzhou region. Based on results and detailed data from Guangzhou Active Faults and Seismic Hazard Assessment Project, such as shallow and deep sections of seismic reflection/ refraction surveys, boring database, velocity exploration and so on, the 3D velocity structure model was set up. Modeling codes and developed tools based on multi-function software were used to analyze the mass data and information. The 2D third order B-spline function was proposed to produce the given data points which are spread widely and randomly in the target area in order to optimize the model. The study provides a scientific basis for evaluating near-fault strong ground motions from future earthquakes to mitigate earthquake damages in urban areas.
引文
[1]赵伯明.广州市活断层探测与地震危险性评价-广州市地震危害性评价研究[R].北京交通大学,2007,10.
[2]Koketsu,K.and Higashi,S.Three-dimensional topography of the sediment/basement interface in the Tokyo Metropolition Area,central Japan[J].Bull.Seim.Soc.AM.,1992,82:2328-2349.
[3]Zhao,B.M.and Kagawa T.,Study on3D hybrid modeling method for strong motion simulation with high accuracy[A].Proceedings of the Japan Society of Civil Engineers Fall Meeting[C].2004.
[4]Zhao,B.M.and Kagawa T.,3D hybrid structure modeling method with locally detailed model and spline function model[A].Proceedings of the Japan Earth and Planetary Science Joint Meeting,S981[C].2004.
[5]Zhao,B.M.and Kagawa,T.A study on modeling Osaka shallow layered structure using3-D spline functions[A].Proceedings of the Japan Earth and Planetary Science Joint Meeting,S1021[C].2004.
[2]Koketsu,K.and Higashi,S.Three-dimensional topography of the sediment/basement interface in the Tokyo Metropolition Area,central Japan[J].Bull.Seim.Soc.AM.,1992,82:2328-2349.
[3]Zhao,B.M.and Kagawa T.,Study on3D hybrid modeling method for strong motion simulation with high accuracy[A].Proceedings of the Japan Society of Civil Engineers Fall Meeting[C].2004.
[4]Zhao,B.M.and Kagawa T.,3D hybrid structure modeling method with locally detailed model and spline function model[A].Proceedings of the Japan Earth and Planetary Science Joint Meeting,S981[C].2004.
[5]Zhao,B.M.and Kagawa,T.A study on modeling Osaka shallow layered structure using3-D spline functions[A].Proceedings of the Japan Earth and Planetary Science Joint Meeting,S1021[C].2004.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心