检索结果-南通市图书馆

Qualitative Analyses of Correlations between Strong Ground motions of the Three Large Earthquakes and Landslide Distributions

引用

Journal of Earth Science 2023年第2期34卷 369-380页

作者： Yuzhu Bai Chong Xu Institute of Geology China Earthquake AdministrationBeijing 100029China National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing 100085China

In this work,the correlations between spatial distributions of landslide point density(LPD)and strong Ground motions of the three strong earthquakes are qualitatively investigated.Meanwhile the qualitative relationship between the distribution of LPD and the fault rupture process is also characterized.Three strong events are the Lushan,Wenchuan,and Jiuzhaigou earthquakes.In order to reconstruct the near filed strong Ground motions and the fault processes of these earthquakes,the broadband ground simulation method of University of California Santa Barbara(UCSB)and the simplified crustal layer structures are applied.To show the rationality of the UCSB method,the fault slip distributions of the three earthquakes reconstructed by the kinematic rupture generator model in the UCSB method are compared with those by inversed.Furthermore,the validation of the UCSB method for the three earthquakes is also carried according to the validation exercise of the Southern California Earthquake Center(SCEC)Broadband Platform(BBP).Lastly,the fields of peak ground acceleration(PGA)and peak ground velocity(PGV)in three mutually perpendicular directions of the three earthquakes are achieved.Generally,the landslide distribution length of large LPD values along the fault strike is less than the fault strike length.Therefore,the slip modes of earthquake faults affect the distributions of landslides.For the strike slip earthquakes,the distributions of large LPD values relate well to PGA and PGV components of the parallel and normal to the fault strike.For the reverse slip earthquakes,distributions of LPD relate to ground motion components in all directions.Moreover,distributions of landslides in near fields of earthquakes are significantly affected by the focus parameters and fault scales.

关键词： Lushan earthquake Wenchuan earthquake Jiuzhaigou earthquake landslide Ground motions engineering geology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The qualitative analyses of correlations between strong Ground motions of the three large earthquakes and landslide distributions

引用

Journal of Earth Science 2021年

作者： Yuzhu Bai Chong Xu Institute of Geology China Earthquake Administration

In this work， the correlations between spatial distributions of landslide point density (LPD) and strong Ground motions of the three strong earthquakes are qualitatively investigated. Meanwhile the qualitative relationship between the distribution of LPD and the fault rupture process is also characterized. Three strong events are the Lushan， Wenchuan， and Jiuzhaigou earthquakes. In order to reconstruct the near filed strong Ground motions and the fault processes of these earthquakes， the broadband ground simulation method of University of California Santa Barbara (UCSB) and the simplified crustal layer structures are applied. To show the rationality of the UCSB method， the fault slip distributions of the three earthquakes reconstructed by the kinematic rupture generator model in the UCSB method are compared with those by inversed. Furthermore， the validation of the UCSB method for the three earthquakes is also carried according to the validation exercise of the Southern California Earthquake Center (SCEC) Broadband Platform (BBP). Lastly， the fields of peak ground acceleration (PGA) and peak ground velocity (PGV) in three mutually perpendicular directions of the three earthquakes are achieved. Generally， the landslide distribution length of large LPD values along the fault strike is less than the fault strike length. Therefore， the slip modes of earthquake faults affect the distributions of landslides. For the strike slip earthquakes， the distributions of large LPD values relate well to PGA and PGV components of the parallel and normal to the fault strike. For the reverse slip earthquakes， distributions of LPD relate to ground motion components in all directions. Moreover， distributions of landslides in near fields of earthquakes are significantly affected by the focus parameters and fault scales.

关键词： Lushan earthquake Wenchuan earthquake Jiuzhaigou earthquake Landslide Ground motions

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Blast damage zone strength reduction method for deep cavern excavation and its application

引用

FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING 2024年第2期18卷 236-251页

作者： Yao, Tianzhi Mo, Zuguo Qian, Li Gao, Yunpeng Zhang, Jianhai Xing, Xianglin Liu, Enlong Zhang, Ru Sichuan Univ State Key Lab Hydraul & Mt River Engn Coll Water Resources & Hydropower Chengdu 610065 Peoples R China Power China Chengdu Engn Corp Ltd Chengdu 610072 Peoples R China

The drill and blast (D&B) method is widely used to excavate underground spaces, but explosions generally cause damage to the rock. Still, no blast simulation method can provide computational accuracy and efficiency. In this paper, a blast equivalent simulation method called the blast damage zone strength reduction (BDZSR) method is proposed. This method first calculates the range of the blast-induced damage zone (BDZ) by formulae, then reduces the strength and deformation parameters of the rock within the BDZ ahead of excavation, and finally calculates the excavation damage zone (EDZ) for the D&B method by numerical simulation. This method combines stress wave attenuation, rock damage criteria and stress path variation to derive the BDZ depth calculation formulae. The formulae consider the initial geo-stress, and the reliability is verified by numerical simulations. The calculation of BDZ depth with these formulae allows the corresponding numerical simulation to avoid the time-consuming dynamic calculation process, thus greatly enhancing the calculation efficiency. The method was applied to the excavation in Jinping Class II hydropower station to verify its feasibility. The results show that the BDZSR method can be applied to blast simulation of underground caverns and provide a new way to study blast-induced damage.

关键词： attenuation of stress wave deep-buried underground building drill and blast in situ stress NUMERICAL-SIMULATION Ground motions CRUSHED ZONE ROCK REDISTRIBUTION PROPAGATION EXPLOSION SIZE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A preliminary report on the Great Wenchuan Earthquake

引用

Earthquake Engineering and Engineering Vibration 2008年第2期7卷 225-234页

作者： Wang Zifa Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China

The May 12, 2008 Great Wenchuan Earthquake has resulted in more than 68,858 deaths and losses in the hundreds of billions RMB as of May 30, 2008, and these numbers will undoubtedly increase as more information becomes available on the extent of the event. Immediately after the earthquake, the China Earthquake Administration （CEA） responded quickly by sending teams of experts to the affected region, eventually including over 60 staff members from the Institute of Engineering Mechanics （IEM）. This paper reports preliminary information that has been gathered in the first 18 days after the event, covering seismicity, search and rescue efforts, observed Ground motions, and damage and loss estimates. The extensive field investigation has revealed a number of valuable findings that could be useful in improving research in earthquake engineering in the future. Once again, this earthquake has shown that the vertical component of ground motion is as significant as horizontal Ground motions in the near-source area. Finally, note that as more information is gathered, the numbers reported in this paper will need to be adjusted accordingly.

关键词： Wenchuan Earthquake field investigation Ground motions vertical acceleration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on the near-field ground motion of Fukuoka earthquake by the method of computing Green’s functions for a layered half-space

Study on the near-field ground motion of Fukuoka earthquake ...

引用

The 4th International Conference on Environmental and Engineering Geophysics

作者： Di Wu~(1,2,3),Qifeng Luo~2,Yan Xiong~3,Ping Tan~1 1.Key Laboratory of Earthquake Engineering and Applied Technique of Guangdong Province Guangzhou University Guangzhou 510405 China 2.Research Institute of Structure Engineer and Disaster Reduction,Tongji University,Shanghai 200092, China 3.State Key Laboratory of Subtropical Building Science South China University of Tech,Guangzhou 510640, China

＜正＞The slip distributions on the fault,the source rupture process and the other seismic parameters of Fukuoka earthquake determined by Japan researchers are accepted in this paper.The station Genkai is chosen as a site to analyze the Fukuoka Earthquake wave in near field by using the Green’s function method for a layered half-space.A comparative study of the acceleration time history of the calculated results and records are carried out.The waveforms of the calculated results are in good agreement with those of the observed records at the station Genkai,and the peak values in the calculated results are close to that of the records.The Fourier spectra of the calculated acceleration time history are basically identical with those of the records while the frequency is below 5.Some useful conclusions are drawn that the near-field ground motion of Fukuoka earthquake can be effectively estimated by the method of computing Green’s functions for a layered half-space in the condition of the uniform geologic site.The seismic parameters of Fukuoka earthquake are helpful to study the near-field and far-field Ground motions and the influence on eastern China including Shanghai.

关键词： Fukuoka earthquake Green’s function near-field Ground motions

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：