The Advances and Prospects of Research on Earthquake Engineering at IEM     

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   

The experimental studies on electrical con-ductivities and P-wave velocities of anortho-site at high pressure and high temperature   总被引：1，自引：0，他引：1  

白利平  杜建国  刘巍  周文戈 《地震学报(英文版)》2002,15(6):667-676

Introduction The measurements of the compressional wave velocity and electrical conductivity of minerals and rocks are of fundamental importance to look into the earths interior, including composition, geotherm, generation and distribution of fluids and melts. Hydrous minerals formed by metamatu-siom are abundant within the earth. Previous studies have been carried out on the dehydration effect on the electrical conductivity and wave velocity of rocks such as serpentine, amphibole, most of whi…  相似文献   

Models of passive margin inversion: implications for the Rhenohercynian fold-and-thrust belt, Belgium and Germany     

Y Vanbrabant  J Braun 《Earth and Planetary Science Letters》2002,202(1):15-29

Positive tectonic inversion is related to the transmission of compressional stresses along a décollement into the foreland of an orogenic zone. This stress and strain concentration in regions remote from the main orogenic front is commonly related to the presence of pre-existing rheological heterogeneities such as normal syn-depositional faults. During inversion, these pre-existing normal faults are reactivated as reverse faults. Tectonic inversion in the Rhenohercynian fold-and-thrust belt during the Variscan Orogeny shows that inversion is likely synchronous with the onset of collision in the hinterland. Here, we present the results of a simplified thermo-mechanical model (STM) which allows one to study strain partitioning between two orogenic zones. We show that, if the two orogenic zones have the same mechanical properties, the viscosity of the décollement, which links them, controls the initial strain partitioning. During subsequent finite shortening, erosional processes determine the partitioning of strain rate. The presence of a weak structure in the inverted zone and of a low-viscosity décollement leads to initial strain concentration in the inverted track rather than in the collision zone and a progressive decrease in strain partitioning between the two orogenic zones. The STM results are in good agreement with results of a 2D finite-element model. We conclude that, in the western part of the Rhenohercynian Massif, simultaneous uplift and deformation within the Mid-German Crystalline Rise (the main collision zone) and the Ardenne Anticlinorium (the inverted zone) lead to interpreting this orogenic event as a case of vice tectonic rather than the propagation of a ‘wave of folding’ towards the Variscan front, as suggested by previous authors.  相似文献   

环渤海地区油气资源探查的思考   总被引：6，自引：6，他引：6  

刘光鼎  郝天珧  祝靓谊 《地球物理学进展》2002,17(4):559-563

回顾过去渤海勘探实践的经验，对于指导今后的研究工作是十分重要的。40年来渤海地区发现大量新老第三纪陆相石油资源，成为中国的重要产油区，也积累了丰富的勘探经验。深化环渤海地区油气资源的探查，首先应考虑前新生代海相油气资源。但其勘探是高难度的，前景是诱人的。应该认真贯彻下列认识原则：（1）区域指导局部；（2）深部制约浅层；（3）在地震处理解释创新的同时，大力发展综合地质地球物理研究。  相似文献   

黄海及其沿岸历史地震初步研究     

吴戈  刘昌森  江在雄  翟文杰  吴镝 《四川地震》2002,(2):14-22

黄海及其边缘，经历史地震资料整理，地震参数估定与编目，截至1949年8月，共有M≥3级地震2187次，其中M≥43/4级地震259次，资料显示大致有三个相对集中活跃区，16世纪曾有过历史地震活动高潮。  相似文献   

山西地电中短期前兆异常识别方法浅析   总被引：1，自引：0，他引：1  

郭宝娥  李俊拴  白晓勤 《山西地震》2002,(1):29-32

用傅氏滑动法、动态距平法、速率法、均值法等对山西大同台、代县台、临汾台的地电异常进行了分析 ,对地电阻率异常的判定、预报方法效能进行了评价 ,对不同的台站 ,从正常的变化形态中找出了突出异常的有效方法 ,从中提取出因地壳应力变化引起的地震前兆异常 ,结果表明 ,5 .0级以上地震在Δ=15 0 km范围内有明显的中短期前兆异常  相似文献   

基于Exchange Server 5.0前兆网络邮件系统的建立     

周浩  周华  盛宪昆  张凤鸣  王诚志  孟宪森 《山西地震》2002,(2):24-29

各省地震局 95 - 0 1- 0 2地震信息网络项目采用的邮件系统是基于 IRIX 6 .5操作系统的Netscape Mail Server2 .0 ,由于其应用与管理有局限性 ,笔者进行了基于 NT系统的 ExchangeServer5 .0邮件系统的应用研究 ,详细论述了基于 Exchange Server5 .0的黑龙江省地震前兆信息网络邮件系统的安装及配置过程 ,得出该网络邮件系统有管理方便、功能强大的结论  相似文献   

河南豫北地震台网地区波速的探讨     

韩美玲  张炜  郑培玲 《山西地震》2002,(3):5-7,12

为了解决河南豫北地区地震的定位问题 ,对豫北台网内的 10个典型地震 ,使用了 7个地震台站的资料 ,用波速比求出横波速度 ;用和达定位法 (有的同时使用高桥法 )进行了精确定位 ,求出震源深度 ;测量了震中至各台的震中距 ,以此反算出了纵波速度。通过计算 ,确定出了较为适合河南豫北地震台网地区的波速。  相似文献   

山西北部至晋冀蒙交界地区几次中强地震前4.0级地震活动的研究     

薛丁  徐建德  阎海滨  张晁军  朱学健 《山西地震》2002,(4):17-21

对山西北部至晋冀蒙交界地区中强地震前的 4 .0级地震进行了研究 ,得出其特征为异常增强—异常平静—信号地震的结论 ,认为该区某些 4 .0级地震活动似可作为某些中强地震的前兆地震而进行进一步的研究。  相似文献   

人类活动对黄河中游高含沙水流的影响   总被引：7，自引：2，他引：7  

许炯心 《地理科学》2002,22(3):294-299

以黄河中游干流和渭河、无定河的资料研究了人类活动对黄土高原河流高含沙水流的发生频率的影响。人类破坏森林植被，大量拦截黄河上游清水来源区的清水基流，使得高含沙水流发生频率增大，大规模水土保持措施的实施则使高含沙水流发生频率迅速减小。近50年来黄河干流和一些支流的高含沙水流随时间的变化可以用一个三阶段模式来概括，即20世纪50-60年代，由于人类破坏植被，使高含水流频率增大；20世纪60年代末至80年代中期，大规模水土保持措施的实施使高含沙水流发生的频率减小；20世纪80年代末期以来，人类大量拦截利用清水资源，使高含沙水流的发生频率又复增大。  相似文献