桥梁限位器抗震设计方法研究

本文建立了两跨简支梁桥和五跨多跨刚架桥两结构模型，针对限位器的种类、刚度、强度、安装位置，输入地震动等进行了大量工况下的数值模拟研究。研究表明限位器与柱（框架）的刚度比在0.5-2之间较优。将现有的限位器设计方法应用于两算例结构，对现有限位器设计方法进行了比较研究。     

The Advances and Prospects of Research on Earthquake Engineering at IEM

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.     

上海地震台阵的地震定位方法

详细介绍了上海地震台阵数据处理软件系统中的地震定位方法，用台阵的聚束方法得到地震的方位角和视慢度，根据统计得到的视慢度－震中距表推算震中距。并结合了地震台网的定位方法，由单台记录的各类主要震相从J－B走时表得到震中距，然后进行地震定位。该定位方法可对近震、远震进行定位处理，并由深震相得到震源深度。     

F-K分析在上海地震台阵建设中的应用

利用F K分析处理地震台阵数据 ,进行地震波场分析 ,按频率分量、速度矢量来分解几乎同时到达台阵的信号 ,识别不同慢度的波 ,有助于地震波类型鉴别研究 .主要讨论了F K分析具体实现的方法和如何应用于上海地震台阵的选址与建设     

Recent developments in seismically isolated buildings in Japan

The Building Standard Law of Japan and related Enforcement Order and Notifications have been substantially revised since the year 2000 to introduce a performance-based regulatory and deregulation system for building control systems. Up to then, time-history analyses were mandatory for isolated buildings and had to be specially approved by the Minster of the Ministry of Construction (MOC). Simplified design procedures based on the equivalent linear method for seismically isolated buildings have been issued as “Notification 2009 — Structural calculation procedure for buildings with seismic isolation” from MOC, and are now integrated into the Ministry of Land, Infrastructure, and Transportation (MLIT). Along with Notification 2009, “Notification 1446 of year 2000 — Standard for specifications and test methods for seismic isolation devices” was also issued. Buildings with heights equal to or less than 60m and that are designed according to these Notifications, including base isolated buildings, only need approval from local building officials, and no longer require the special approval of the Minister of MLIT. This paper summarizes: 1) some statistics related to buildings with seismic isolation completed up to the end of 2001; 2) simplified design procedures required by Notification 2009 of year 2000; and 3) performance of seismic isolation devices required by Notification 1446 of year 2000.     

辽宁省抚顺市区地质灾害监测系统设计方案

抚顺市地质灾害监测系统，由5方面工作内容组成：(1)建立统一可靠的城市高程起算基准；(2)扩展现有的沉降监测网，使分散的监测点联合形成全面、统一的监测网；(3)对浑河断裂带主断层实施监测；(4)对西露天采坑北坡滑坡重点区和采煤沉陷重点区实施水平位移监测；(5)利用计算机技术和地理信息系统(GIS)技术，建立抚顺市地质灾害信患系统。该系统是城市地质灾害防治的基础工程。系统应用了先进的监测手段及数据处理技术。文章介绍了系统的设计方案。     

抗拔桩设计方法

当地下水位较高时,地下车库等附属建筑物不得不对抗浮问题进行考虑,抗拔桩被越来越多的应用于工程中。依据工程实例对抗拔桩设计荷载条件、抗浮桩单桩承载力设计、抗浮桩桩身结构设计、群桩地基整体稳定性、单位面积抗浮力、抗拔桩抗裂分别进行了阐述,以及抗拔桩设计中应考虑的问题进行了论述。     

机械卡盘设计中的计算误差分析与应用

通过对普通机构二维力因素影响的分析，利用修正公式计算求值，以修正单因素影响最大值计算所产生的误差。利用这一计算方法，对CD—3型钻机卡盘进行了计算，得到了正确的设计结果，说明用修正公式对多因素影响采用单因素影响最大值计算进行修正是可行的。     

差异性风化岩石作为桩基持力层设计应注意的若干问题

基岩中存在软弱夹层为岩石的差异性风化的主要特征。在不均匀性地基土上选用该类地层作为钻孔灌注桩持力层时，它的存在将对桩长、单桩承载力、桩体沉降等带来不同程度的影响。以黄石电厂为例，指出在选用差异性风化岩石作为桩基持力层时应注意的若干问题。     

现代抗震设计理论的发展过程

介绍了现代抗震设计理论的发展过程，基于性态的抗震设计理论的提出背景、发展情况及研究内容；详细介绍了基于性态的抗震设计理论的抗震设防方法；指出了基于性态的抗震设计理论与传统抗震设计理论的主要区别及特点。