Seismic analysis of base-isolated liquid storage tanks using the BE–FE–BE coupling technique     

Moon Kyum Kim  Yun Mook Lim  Seong Yong Cho  Kyung Hwan Cho  Kang Won Lee 《Soil Dynamics and Earthquake Engineering》2002,22(9-12):1151-1158

A three-dimensional soil–structure–liquid interaction problem is numerically simulated in order to analyze the dynamic behavior of a base-isolated liquid storage tank subjected to seismic ground motion. A dynamic analysis of a liquid storage tank is carried out using a hybrid formulation, which combines the finite shell elements for structures and the boundary elements for liquid and soil. The system is composed of three parts: the liquid–structure interaction part, the soil–foundation interaction part, and the base-isolation part. In the liquid–structure interaction part, the tank structure is modeled using the finite elements and the liquid is modeled using the internal boundary elements, which satisfy the free surface boundary condition. In the soil–foundation interaction part, the foundation is modeled using the finite elements and the half-space soil media are modeled using the external boundary elements, which satisfy the radiation condition in the infinite domain. Finally, above two parts are connected with the base-isolation system to solve the system's behavior. Numerical examples are presented to demonstrate the accuracy of the developed method, and an earthquake response analysis is carried out to demonstrate the applicability of the developed technique. The properties of a real LNG tank located in the west coast of Korea are used. The effects of the ground and the base-isolation system on the behavior of the tank are analyzed.  相似文献   

液化场地桩-土-桥梁结构动力相互作用振动台试验研究进展   总被引：20，自引：3，他引：20  

凌贤长  王东升 《地震工程与工程振动》2002,22(4):53-59

本文在全面归纳与总结液化场地桩－土－桥梁结构动力相互作用振动台试验及与之相关领域的国内外研究进展基础上，直接针对我国桥梁工程中的主要震害问题，提出在我国开展液化场地桩－土－桥梁结构动力相互作用振动台试验研究的必要性，并阐述作者对液化场地桩－土－张桥梁结构动力相互作用振动台试验中若干问题的认识。  相似文献   

Evaluation of the seismic hazard of Lebanon     

M. Harajli  S. Sadek  R. Asbahan 《Journal of Seismology》2002,6(2):257-277

This paper presents the results of a study undertaken todetermine the seismic hazard of Lebanon. The seismic hazard evaluation wasconducted using probabilistic methods of hazard analysis. Potential sourcesof seismic activities that affect Lebanon were identified and the earthquakerecurrence relationships of these sources were developed from instrumentalseismology data, historical records, and earlier studies undertaken toevaluate the seismic hazard of neighboring countries. The sensitivityof the results to different assumptions regarding the seismic sources in theLebanese segment and choice of the attenuation relationship wasevaluated. Maps of peak ground acceleration contours, based on 10percent of probability of exceedance in 50 years and 100 years time spans,were developed.  相似文献   

Investigating Landslides Caused by Earthquakes – A Historical Review     

David K. Keefer 《Surveys in Geophysics》2002,23(6):473-510

Post-earthquake field investigations of landslide occurrence have provided a basis for understanding, evaluating, and mapping the hazard and risk associated withearthquake-induced landslides. This paper traces thehistorical development of knowledge derived from these investigations. Before 1783, historical accounts of the occurrence of landslides in earthquakes are typically so incomplete and vague that conclusions based on these accounts are of limited usefulness. For example, the number of landslides triggered by a given event is almost always greatly underestimated. The first formal, scientific post-earthquake investigation that included systematic documentation of the landslides was undertaken in the Calabria region of Italy after the 1783 earthquake swarm. From then until the mid-twentieth century, the best information on earthquake-induced landslides came from a succession ofpost-earthquake investigations largely carried out by formal commissions that undertook extensive ground-based field studies. Beginning in the mid-twentieth century, when the use of aerial photography became widespread, comprehensive inventories of landslide occurrence have been made for several earthquakes in the United States, Peru, Guatemala, Italy, El Salvador, Japan, and Taiwan. Techniques have also been developed for performing ``retrospective' analyses years or decades after an earthquake that attempt to reconstruct the distribution of landslides triggered by the event. The additional use of Geographic Information System (GIS) processing and digital mapping since about 1989 has greatly facilitated the level of analysis that can applied to mapped distributions of landslides. Beginning in 1984, syntheses of worldwide and national data on earthquake-induced landslides have defined their general characteristics and relations between their occurrence and various geologic and seismic parameters. However, the number of comprehensive post-earthquake studies of landslides is still relatively small, and one of the most pressing needs in this area of research is for the complete documentation of landslides triggered by many more earthquakes in a wider variety of environments.  相似文献   

泾阳4.8级地震的构造背景   总被引：12，自引：1，他引：12       下载免费PDF全文

王卫东 《地震工程学报》2002,24(2):145-149

1998年1月5日烃阳Ms 4.8地震是陕西省近40年来发生的最大一次地震。研究了此次地震的构构背景和地球物理场特征。  相似文献   

大同市万泉河盆地地下水研究     

吕继峰  张喜峰 《中国煤田地质》2003,15(1):31-32,38

利用遥感及物探资料通过对大同市万泉河盆地地质构造的分析，合理地解释了万泉河盆地地下水的成因机制及其补给、径流、排泄关系。同位素年龄测试，进一步提示出沿口泉断裂破碎带有远源地下水进入本区，使盆地内的地下水来源趋于多样化。  相似文献   

晋祠泉断流与地下水资源保护关系   总被引：4，自引：0，他引：4  

黄皓莉 《中国煤田地质》2003,15(2):26-28

通过对晋祠泉域岩溶地下水水文地质条件的分析,阐述了晋泉形成机理和断流原因,认为晋泉断流是多种因素的综合效应。说明地下水资源保护是一项系统工程,应采取统一的、科学的、多层次的全面管理,才能有效地保护有限的地下水资源,唤醒人们在进行经济建设的同时,要注意保护我们赖以生存的地球环境。  相似文献   

金风口地面塌陷及水源干枯成因及防治     

张发林 《地质灾害与环境保护》2003,14(1):11-14

通过对金风口片区地表的调查，分析了地面降沉、塌陷的原因；研究了塌陷对水源的影响；总结了水源干枯的规律及影响因素；并提出了防治的办法及合理化建议。  相似文献   

山东省集雨增补地下水与水资源可持续利用探讨   总被引：7，自引：0，他引：7  

陈克森 《水文》2003,23(1):28-31

分析了山东省水资源特点、开发利用状况以及水资源持续利用所面临的形势，在阐述山东省降雨、地理等自然特点的基础上，认为集雨增补地下水是实现水资源可持续利用的有效途径，提出了集雨增补地下水的技术措施。  相似文献   

南京市玄武湖水下交通隧道环境地质评价   总被引：3，自引：0，他引：3  

孙亚哲  阎长虹  许崧  许宝田 《水文地质工程地质》2003,30(4):72-75

玄武湖地下交通隧道既在城市,又在水下,环境地质条件极为复杂,是一种脆弱环境下的典型的地质工程。本文对玄武湖地下交通隧道的环境地质条件特别是水文地质条件进行了评价,预测了可能出现的如水污染、地面沉降、地面塌陷、巷道突水等环境地质问题,并提出了相应的防治对策。  相似文献