| 广州地区三维地下速度结构模型建立及优化研究 |
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| 引用本文： | 赵伯明.广州地区三维地下速度结构模型建立及优化研究[J].华南地震,2008,28(4):45-52. |
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| 作者姓名： | 赵伯明 |
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| 作者单位： | 北京交通大学,北京,100044 |
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| 基金项目： | 国家自然科学基金
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国家"十五"重大科学工程《中国活断层探测与地震危险性评价》
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科技部地震行业基金
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| 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。
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| 关 键 词： | 活断层 地下速度结构模型 B-Spline函数 强地震动预测 广州地区 |
Modeling of 3D Underground Velocity Structure in Guangzhou |
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| ZHAO Boming.Modeling of 3D Underground Velocity Structure in Guangzhou[J].South China Journal of Seismology,2008,28(4):45-52. |
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| Authors: | ZHAO Boming |
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| Institution: | ZHAO Boming (1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Engineering Research Center of Tunnel and Underground Engineering, Beijing Jiaotong University Ministry of Education, Beijing 100044, China) |
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| Abstract: | 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-fauh strong ground motions from future earthquakes to mitigate earthquake damages in urban areas. |
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| Keywords: | Active fault Underground velocity structure model B-spline function Prediction of strong ground motion Guangzhou |
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