共查询到18条相似文献，搜索用时 140 毫秒
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第16届欧洲地震工程大会于2018年6月18—22日在希腊塞萨洛尼基市召开,笔者全程参加了本次大会。本文简要介绍了大会的概况,通过对大会相关交流报告和论文的分析,重点对地震危险性、工程地震和强地面运动,土动力学,场地效应与小区划研究,岩土地震工程等4个主题分会和"欧洲—中国地震工程与风险合作"1个专题分会的相关研究进展进行了综述,并阐述了欧洲抗震设计规范(Eurocode8)推广应用与修订、韧性城市、新近地震启示、大尺度地震工程试验装备和土-基础-结构相互作用等方面的研究动向。可为我国相关领域研究提供参考。 相似文献
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第六届国际地震岩土工程大会于2015年11月1-4日在新西兰克莱斯特彻奇市召开。本文介绍了大会概况;阐述了大会设置的21个专题,并综述了场地效应和小区划,斜坡、河堤、大坝与废弃物填埋场,地震危险性与强地面运动,土壤液化与侧向扩展共4个重要专题分会的交流内容;通报了国际地震岩土工程及其问题技术委员会(TC203)全委会内容和决议事项;论述了相关领域的研究进展与亮点,包括新西兰坎特伯雷地震灾后重建催生了岩土工程共享数据库建设取得突破性进展;土壤液化与侧向扩展研究成为国际岩土地震工程一大热点研究领域;提出了在液化机理、液化势评价、液化后变形和基于性能的抗液化工程设计等方面需要进一步研究的重要问题;运动颗粒模拟方法实现了对斜坡破坏的全过程数值模拟;"Ishihara-Idriss-Finn演讲特别分会"成为本次会议一大亮点;2010-2011年新西兰坎特伯雷地震序列(CES)发生后,美国与新西兰开展了非常紧密的合作调查与研究工作,并在地震序列认识、灾害快速评估、确保稳健恢复的政策与规划分析等方面取得了多方受益的科学进展。 相似文献
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第16届世界地震工程大会于2017年1月9—13日在智利圣地亚哥市召开。大会主题为:"快速恢复—地震工程新挑战"。经中国地震局批准,在国际合作司的大力支持和指导下,自己有幸赴智利圣地亚哥市参加了第16届世界地震工程大会。本论文对会议概况做了简介,对其中3个大会特邀报告、2场辩论会和12个专题分会报告内容进行了综述,并与读者分享了我个人的体会和思考。论文综述涉及的3个大会特邀报告题目分别为"快速恢复:地震工程的下一个挑战"、"钢筋混凝土建筑物抗震设计中对快速恢复的探索——智利的实践"和"长持时地震动对土液化灾害的作用";2场辩论会主题分别为"性态设计:是承诺还是陷阱?"和"抗震设防要求规定:概率性与确定性";12个专题分会主题包括:结构倒塌概率的评估,改善发展中国家住房地震安全的非技术战略,近期破坏性地震(包括2015年尼泊尔地震)的现场调查与分析,深基础的土-结构相互作用,地面破坏与液化,地震引起的天然斜坡滑坡,岩土室内试验和现场试验,城市层面的地震危害性、危险性与地震风险管理,快速恢复,地震风险经济与保险,城市的未来:今天规划明天的地震风险,管理政策等。 相似文献
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介绍了第13届世界地震工程大会的概况。内容涉及大会报告和6个专题(工程地震、岩土地震工程、结构工程、生命线工程、综合减灾与社会经济问题以及近期地震的经验教训与地震工程实践)。作者还对目前国际范围内的地震工程最新进展及其发展趋势作以论述。最后，根据对本届世界地震工程大会的认识，作者对如何办好由中国地震局主办2008年在我国北京举行的第14届世界地震工程大会谈了一些初步的看法。笔者愿以此文使国内同行对本届大会有一个概略的了解。 相似文献
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本刊编辑部 《地震工程与工程振动》2006,26(2):19-19
由中国建筑学会抗震防灾分会、中国地震学会地震工程专业委员会主办,广州大学承办,广东省地震局、广东省土木工程学会和华南理工大学协办的第七届全国地震工程学术会议将于2006年11月16日至19日在广州市召开。会议将邀请全国地震工程领域的著名专家和学者作特邀报告,同时将举行地震工程领域的专著、学术刊物、防震减灾技术和产品展示,并组织参观典型防震减灾工程。◆征文范围1.地震和震害调查与分析;2.强震观测和地面运动;3.地震危险性分析和抗震设防区划;4.场地效应和地基、基础抗震;5.结构地震反应;6.结构抗震设计、鉴定、加固和改造;7.结… 相似文献
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通过分析由强烈地震引发的场地振动、地面破裂、地基失效和边坡破坏等震害效应令高架交通工程的墩桩基础产生位移、下沉、变形、折断,进而导致高架线路交通工程遭到破坏的实况．提出了一些基于工程场地地震安全性评价的高架线路场地地震地质灾害防御对策与工程地震勘测的建议。 相似文献
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Identification and inverse problem techniques play an important role in the characterization and modeling of geotechnical systems. These techniques have been used in estimation of system parameters, model development and calibration, as well as simulation of earthquake ground motions. The recent availability of high quality seismic records of sites equipped with downhole accelerometer arrays led to a burgeoning of identification and inverse problem studies involving geotechnical systems. This paper presents a survey of system identification techniques and analyses of full- and small-scale soil systems, with an emphasis on geotechnical earthquake engineering problems. 相似文献
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This paper describes recent efforts that incorporate remote sensing techniques and platforms into geotechnical earthquake reconnaissance to document damage patterns, collect three-dimensional geometries of failures, and measure ground movements. The most-commonly used remote sensing techniques in geotechnical engineering (satellite imagery and LIDAR), as well as unmanned aerial vehicles (UAV), are introduced and recent case histories of the use of these techniques in reconnaissance efforts are provided. These examples demonstrate the potential for remote sensing to improve our understanding of geotechnical effects both at a regional scale and at a local level. The use of remote sensing to measure ground movements is particularly noteworthy and has the potential to provide data sets that will improve our ability to quantitatively predict the consequences of liquefaction and landslides. However, to realize this potential, investments must be made in collecting appropriate pre-earthquake data. 相似文献
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A methodology for seismic microzonation and earthquake damage scenarios may be considered as composed of two stages. In the first stage, microzonation maps with respect to estimated earthquake characteristics on the ground surface are generated for an investigated urban area. The effects of local geological and geotechnical site conditions are taken into account based on site characterization with respect to representative soil profiles extending down to the engineering bedrock. 1D site response analyses are performed to calculate earthquake characteristics on the ground surface using as many as possible, hazard compatible real acceleration time histories. In the second stage, vulnerability of buildings and pipeline systems are estimated based on site-specific ground motion parameters. A pilot study is carried out to evaluate seismic damage in a district in Istanbul, Turkey. The results demonstrate the significance of site characterization and site response analysis in calculating the earthquake characteristics on the ground surface in comparison to simplified empirical procedures. 相似文献
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Earthquake-induced hazards are profoundly affected by site effects related to the amplification of ground motions, which are strongly influenced by local geologic conditions such as soil thickness or bedrock depth and soil stiffness. In this study, an integrated geographic information system (GIS)-based system for geotechnical data, called the geotechnical information system (GTIS), was developed to establish a regional counterplan against earthquake ground motions in the Seoul metropolitan area. In particular, to reliably predict spatial geotechnical information, a procedural methodology for building the GTIS within a GIS framework was developed and applied to the Seoul area in Korea. To build the GTIS, pre-existing geotechnical data were collected in and around the study area, and then a walk-over site survey was conducted to acquire surface geo-knowledge data. In addition, the representative shear wave velocities for geotechnical layers were derived by statistically analyzing many seismic test data in Korea. The GTIS was used in a practical application to estimate site effects in the study area; seismic zoning maps of geotechnical earthquake parameters, such as the depth to bedrock and the site period, were created and presented as a regional synthetic strategy for earthquake risk assessment. Furthermore, seismic zonation of site classification was also performed to determine the site amplification coefficients for seismic design and seismic performance evaluation at any site and administrative sub-unit in the study area. The methodology and results of the case study of seismic zonations in the Seoul area verified that the GIS-based GTIS can be very useful for the regional estimation of seismic risk and also to support decisions regarding seismic hazard mitigation, particularly in the metropolitan area. 相似文献
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Site response to earthquake loading is one of the fundamental problems in geotechnical earthquake engineering. Most site response analyses assume vertically propagating shear waves in a horizontally layered soil–rock system and simply ignore the effect of site response to vertical earthquake motion, although actual ground motions are comprised of both horizontal and vertical components. In several recent earthquakes very strong vertical ground motions have been recorded, raising great concern over the potential effect of vertical motion on engineering structures. Being a step toward addressing this concern, this paper presents a simple and practical procedure for analysis of site response to both horizontal and vertical earthquake motions. The procedure involves the use of the dynamic stiffness matrix method and equivalent-linear approach, and is built in the modern MATLAB environment to take full advantages of the matrix operations in MATLAB. The input motions can be specified at the soil–bedrock interface or at a rock outcropping. A detailed assessment of the procedure is given, which shows that the procedure is able to produce acceptable predictions of both vertical and horizontal site responses. 相似文献
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Existing studies for site response analysis in geotechnical earthquake engineering have widely concentrated on the horizontal component of the ground motion. However, strong vertical ground motions have been repeatedly observed, resulting in significant vertical compression damage of engineering structures. Furthermore, for the seismic design of critical structures(e.g. large-scale dams and nuclear power plants), the ground motions in all three directions should be considered. Therefore, there is a need to investigate the site response subjected to the vertical component of the ground motion, especially for the seismic design of critical structures. Consequently, in this study, a numerical program for vertical site response analysis is proposed based on the commonly used analytical transfer function method. The proposed program is then validated against well-documented case studies obtained from the Japanese KiK-net(Kiban Kyoshin network) downhole array monitoring system. Results show that the response spectra at the ground surface are well predicted in the low frequency range(5 Hz), while discrepancies are observed in the high frequency range. However, the high frequency discrepancies do not significantly affect the overall prediction accuracy, as the overall seismic response of geotechnical structures are usually dominated by low frequency vibrations. Furthermore, the limitations in the analysis are also discussed. 相似文献
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The Influence of Earth Temperature on the Dynamic Characteristics of Frozen Soil and the Parameters of Ground Motion on Sites of Permafrost 总被引：1，自引：0，他引：1
Wang Lanmin 《中国地震研究》2004,18(1):1-12
Earth temperature is one of the most important factors influencing the mechanical properties of frozen soil. Based on the field investigation of the characteristics of ground deformation and ground failure caused by the Ms8.1 earthquake in the west of the Kuniun Mountain Pass,China, the influence of temperature on the dynamic constitutive relationship, dynamic elastic modulus, damping ratio and dynamic strength of frozen soil was quantitatively studied by means of the dynamic triaxial test. Moreover, the characteristics of ground motion on a permafrost site under different temperatures were analyzed for the four profiles of permafrost along the Qinghai-Xizang (Tibet) Railway using the time histories of ground motionacceleration with 3 exceedance probabilities of the Kunlun Mountains area. The influences of temperature on the seismic displacement, velocity, acceleration and response spectrum on permafrost ground were studied quantitatively. A scientific basis was presented for earthquake disaster mitigation for engineering foundations, highways and underground engineering in permafrost areas. 相似文献