首页 | 官方网站   微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   205篇
  完全免费   43篇
地球科学   248篇
  2017年   7篇
  2016年   3篇
  2015年   2篇
  2014年   10篇
  2013年   9篇
  2012年   10篇
  2011年   11篇
  2010年   10篇
  2009年   13篇
  2008年   13篇
  2007年   21篇
  2006年   16篇
  2005年   15篇
  2004年   7篇
  2003年   8篇
  2002年   7篇
  2001年   10篇
  2000年   12篇
  1999年   4篇
  1998年   10篇
  1997年   6篇
  1996年   15篇
  1995年   12篇
  1994年   6篇
  1993年   4篇
  1992年   3篇
  1991年   2篇
  1990年   1篇
  1988年   1篇
排序方式: 共有248条查询结果,搜索用时 125 毫秒
1.
基于已有震害矩阵模拟的群体震害预测方法研究   总被引:7,自引:6,他引:1  
本文提出了一种群体震害预测方法,根据已有建筑物震害预测结果或震害统计分析结果,按照影响建筑物抗震能力的主要因素,由普查资料统计出的建筑物各影响因素的建筑面积比例得出模拟震害矩阵与已知矩阵的贴近度,最后进行加权平均,建立具体预测对象群体建筑物的震害矩阵。  相似文献   
2.
青新交界8.1级地震生命线工程震害   总被引:15,自引:5,他引:10  
介绍了青新交界8.1级地震中青藏公路沿线各类生命线工程的震害,初步分析了产生震害的原因。  相似文献   
3.
珠江三角洲通信系统震害预测   总被引:1,自引:1,他引:0  
张竞  杜修力 《华南地震》1995,15(3):47-51
基于珠江三角洲通信建筑物的调查资料,对典型的通信建筑物做了时程地震反应分析和单体震害预测;对另一些建筑物做了群体震害预测;并就通信设备震害预测问题做了简单评述。  相似文献   
4.
1987年9月19日富蕴北5.8级地震   总被引:1,自引:1,他引:0  
1987年6月19日新疆富蕴县可可托海镇西北发生了Ms=5.8级地震,震中位于喀依尔提河与阿拉散河交汇处,震中烈度为Ⅶ度,等震线长轴方向与可可托海——二台断裂基本一致。震中区人员无伤亡,仅有山石滚落;Ⅵ、Ⅴ度区内的土平房、有不同程度的损坏个别砖平房,楼房出现裂缝。这次地震属于孤立型地震,震前有中短期异常。  相似文献   
5.
The intensity and focal mechanism of the Bullas earthquake of 29 January 2005 have been determined. The intensity assessment has been carried out using the EMS-98 scale and plotted on an intensity map. The focal mechanisms for the main shock and largest aftershock have been estimated from moment tensor inversion of body waves. The mechanisms obtained show left-lateral strike-slip faulting and foci at shallow depths, 3–4 km. These results are compared with those of the Bullas 2002 and Mula 1999 earthquakes in the same region.This paper has not been submitted elsewhere in identical or similar form, nor will it be during the first three months after its submission to Journal of Seismology.  相似文献   
6.
Archaeological techniques and methodology are used to identify seismic traces and disorders in ancient buildings. Clear evidence could be identified as direct seismic consequences or as communities’ technical answers for repair or reinforcement of buildings in order to reduce their vulnerability. This methodology is called “archaeological reading of buildings.” It is based on the identification of different construction phases, modifications and past events (human actions or natural phenomena) suffered by buildings during their life. The data read from the buildings are successively observed, identified, described, and recorded, following the principal of archaeological stratigraphy, in order to explain the buildings history. The seismic pathologies are identified according to detailed engineering knowledge of the behaviour of buildings during seismic motion. In this case study, our approach is applied to the historical city of Manosque, located in a seismic area along the “Moyenne–Durance” active fault. As a result of historical researches (Quenet G, Baumont D, Scotti O, Levret A, Ann Geophys, 47(2/3):583–595, 2004), many historical documents gave evidence about this earthquake’s effects. Among these documents, was an exceptional one: the record of a survey made in Manosque by bricklayers a few days after the 14th August 1708 shock. This gave us specific information concerning the seismic damage caused in the town of Manosque and was the starting point to validate the method. In the present paper, the archaeological reading of buildings method is illustrated by two specific cases: the Charité building in Manosque and the Sainte-Agathe chapel in Saint-Maime village. The buildings suffered various modifications during many centuries. This complicates the application of the method, however the observations made from the buildings correlate well with the indications deduced from written sources, validating our approach. The study highlights the necessity to cross correlate different field data in the frame of a multidisciplinary approach in order to obtain valuable results concerning details of seismic damage, its approximate dating by architectural chronology and the communities’ reaction in terms of repairs and reinforcement techniques.  相似文献   
7.
INTRODUCTIONDuetotheincreaseddemandsofmarineengineeringseismologyandseismicsafetyassessmentinlittoralmegalopolisesinrecentyears ,thestudyofhistoricalearthquakebackgroundandtheseismicitypatternsintheYellowSeaanditsadjacentareahasarousedgeneralconcern .Geog…  相似文献   
8.
It has taken more than a hundred years for seismic observations in the Philippines to evolve to a modern observation system.The responsibility of seismic observations was likewise transfeered from one agency to another during this same period of time.At present,the mandate of conducting seismic observatins in the Philippines rests with the Philippine Institute of Volcanology and Seismology(PHIVOLCS),In 2000,through a grant aid from the Japan International Cooperation Agency(JICA),the Philippine Seismic netowrk was upgraded to a digital system.As a result,a new set of seismic monitoring equipments was installed in all of the 34 PHIVOLCS seismic stations all over the country,Digital waveforms are now available for high level seismic data processing.and data acquisition and processing are now automated.Included in the upgrade is the provision of strong motion accelerographs in all stations whose data can now be used for studying ground motion and intensity attenuation relations,The new setup is now producing high-resolution data that can now be used for conducting basic seismological researches,Earthquake locations have now improved allowing for the modeling and delineation of earthquake source regions necessary for earthquake hazard studies.Current seismic hazard studies in the Philippines involve the estimation of ground motion using both probabilitstic and deterministic approaches,seismic microzonation studies of key cities using microtremor observations,paleoseismology and active faults mapping ,and identification of liquefaction-prone,landslide-prone nd tsunami-affected areas.The earthquake database is now being reviewed and completed with the addition of historical events and from data from regional databases,While studies of seismic hazards were primarily concentrated on a regional level ,PHIVOLCS is now focusing on doing these seismic hazard studies on a micriolevel.For Metro Manila,first generation hazard maps showing ground rupture,ground shaking and liquefaction hazards have recently been completed.Other large cities that are also at risk from large earthquakes are the next targets.The elements at risk such as population,lifelines,and vertical and horizontal structures for each of these urban centers are also being incorporated in the hazard maps for immediate use of planners,civil defense officials,policy-makers and engineers.The maps can also now be used to describe possible scenarios during times of strong events and how appropriate socio-economic and engineering responses could be designed.In addition,a rapid earthquake damage assessment system has been started which will attempt to produce immediate or rapid assessments identification of elements at risk durin times of strong earthquakes  相似文献   
9.
XieLili 《中国地震研究》2002,16(3):275-282
This paper describes briefly the recent advances and acievements of the research projects conducted by the Institute of Engineering Mechanics(IEM) in the period of the Ninth Five-Year Plan(1995-2000) with the support of the China Seismological Bureau(CSB),These projects are related with key problems in the field of earthquake engineering.They are:development of the methods for determining earthquake resistant design load level,study on mechanisms of earthquake damage to buildings.development of new technology of base isolation,and study on earthquake damage prediction and seismic losss assessment methods.Through these studies,quite a number of problems have een solved and some of them have een applied in earthquake engineering design and practice.  相似文献   
10.
Microzonation of Bucharest: State-of-the-Art   总被引:3,自引:0,他引:3  
— The 1940 (Mw=7.7) and 1977 (Mw=7.4) Vrancea earthquakes (Romania) inflicted heavy damage and casualties in Bucharest and the statistics indicate a recurrence interval of 25 years for Mw 7.0 events. Under these circumstances, the seismic microzonation represents important information for detailed urban planning that establishes an appropriate level of preparedness to the earthquake threat. This paper reviews the main studies concerning the seismicity of the Vrancea region, the site conditions of the city, the characterization of the building stock, and the codes of practice that regulate the antiseismic design. The first-order microzonation of Bucharest was performed starting from the existing database of structural and geotechnical parameters. New insights originating from direct instrumental observation and interpretation of the local effects as well as realistic numerical modeling that update and improve the input data necessary for a detailed microzoning map of the city are also discussed.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号