| 断层破裂方式对银川盆地强地面运动的影响 |
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| 引用本文： | 张冬丽,张伟,徐锡伟,柴炽章,张献兵. 断层破裂方式对银川盆地强地面运动的影响[J]. 地震工程与工程振动, 2009, 29(4) |
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| 作者姓名： | 张冬丽 张伟 徐锡伟 柴炽章 张献兵 |
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| 作者单位： | 中国地震局,地质研究所,国家活动断层研究中心,北京,100029;北京大学,空间与地球科学学院,北京,100871;宁夏回族自治区地震局,宁夏,银川,750001 |
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| 基金项目： | 国家自然科学基金项目，中国地震局地质研究所中央级公益性科研院所基本科研业务专项，地震科学联合基金项目 |
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| 摘 要： | 银川盆地是受断层控制的断陷性盆地,边缘和内部发育了多条断裂带,特别是其内部晚更新世-全新世活动的银川隐伏断层可能对银川市的建设规划和抗震设防影响较大.为了研究银川隐伏断层活动对银川盆地强地面运动特征的影响,本文以银川隐伏活动断层作为目标断层,模拟了断层发生Mw6.5特征地震时,在单侧破裂和双侧破裂两种方式下,银川盆地的强地面运动分布特征.分析结果表明在两种破裂方式下,盆地内强地面运动表现出不同形态的地震条带状分布特征和上盘效应;同时受到银川盆地边缘断裂"西陡东缓"构造特征的影响,地表强地震动分布和断层附近观测点的时程也呈现出独特的盆地边界反射作用.在单侧破裂和双侧破裂两种模式下,近场强地面运动集中区总体上呈现北强南弱的现象,银川市及附近的芦花台等地区是强地面运动分布的主要区域.
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| 关 键 词： | 银川隐伏断层 强地面运动 数值模拟 破裂方式 |
Influence of seismic source rupture mode on strong ground motion in Yinchuan Basin |
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| ZHANG Dongli,ZHANG Wei,XU Xiwei,CHAI Chizhang,ZHANG Xianbing. Influence of seismic source rupture mode on strong ground motion in Yinchuan Basin[J]. Earthquake Engineering and Engineering Vibration, 2009, 29(4) |
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| Authors: | ZHANG Dongli ZHANG Wei XU Xiwei CHAI Chizhang ZHANG Xianbing |
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| Affiliation: | ZHANG Dongli1,ZHANG Wei2,XU Xiwei1,CHAI Chizhang3,ZHANG Xianbing2(1.National Center for Active Fault Studies,Institute of Geology,China Earthquake Administration,Beijing 100029,China,2.School of Earth , Space Sciences,Peking University,Beijing 100871,3.Earthquake Administration of Ningxia Hui Autonomous Region,Yinchuan 750001,China) |
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| Abstract: | Yinchuan is a graben-like downfaulted Cenozoic era basin with many faults inside basin or along west and east edges.As a late Pleistocene epoch-Holocene active fault,Yinchuan buried fault is one of the active faults which perhaps affect the urban planning and development and earthquake resistance of Yinchuan City seriously.In order to study the influence of Yinchuan buried fault on the strong ground motion in the basin,we simulated the near-field ground motion by means of two rupture modes,unilateral ruptur... |
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| Keywords: | Yinchuan buried fault strong ground motion numerical simulation rupture mode |
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