Modification of Dynamic Foundation Response Due to Soil-Structure Interaction

This paper presents the results from extensive parametric dynamic analyses of soil-structure systems that focus on the clear modification (increase or decrease) of the acceleration amplitude at the foundation with respect to the free-field, especially for squatty structures. Properties of the systems are selected such as to cover a wide range of meaningful geometries and materials for engineering practice. The results are presented in terms of weighted modification factors of the maximum foundation acceleration amplitude with reference to the corresponding maximum acceleration amplitude at free-field, for squatty and more slender structures. For the large majority of the studied systems, foundation acceleration decreases from the free-field by 10–15% on average. Nevertheless, acceleration demand at the foundation increases compared to the free-field, for 30% of squatty and for 15% of the more slender structures. Modification of the foundation acceleration amplitude is also correlated with the ratio of the predominant period of the input motion to the flexible-base system period. Finally, the findings of this study are compared with sparse available recorded data from the Seismic Hazard Harmonization in Europe database.     

An Investigation of the Ground Motion Scaling Procedures for the Nonlinear Seismic Analyses of Concrete Gravity Dams

Seismic assessment of gravity dams is generally carried out using time history analyses. Scaling of the motions is commonly used; however, in contrast to buildings, the performance of scaling procedures at predicting the mean and reducing the dispersion in engineering demand parameters (EDPs) is not known. The main goal of this study is to assess the performance of different scaling procedures in predicting seismic demands on dams. The performance regarding the prediction of the damage and the required number of motions for effective analysis was investigated. The results show that techniques commonly used for moment frames should not readily be applied to these structures.     

魏晋南北朝方志初探

魏晋南北朝时期,在继承秦汉杂述及地理志书的基础上,进入了中国古方志发展史上的一个特殊的繁盛阶段。在国家分裂,朝代更迭的背景下,各种方志层见错出。计有:"记"、"志"、"录"、"传"、"赞"、"图"等多种体例的方志,呈现出不同的特点。这一现象和魏晋南北朝时期的时代特点有紧密的联系,结合时代特点来考察此一时期的方志,才会在总体上得出一个比较客观的评价。     

《扬州画舫录》与扬州清曲

清代康乾时期,《扬州画舫录》已成为一个相当成熟和具有鲜明特点的地方曲种。该曲种表现在活动方式趋于多样,名家辈出,影响深广,曲牌、曲目题材和内容丰富多彩,与昆曲相互吸收和融合,一些文士参加了清曲唱本的创作等诸多方面。     

Multiple Histories: Three Journeys through Academic Records,Medieval Yemen,and Current Anthropology's Encounters with the Past

This chapter sets out to reconsider the interrelation and non-identity between tribal and kinship relations in South-Western Arabia's history through three cumulative methodological steps that are in part inspired by renewed debates on kinship in anthropology, but also by the École des Annales and other historians such as David Sabaean. A first step identifies different legacies of interactions between history and anthropology in the Euro-American academic record after 1945, and specifies their relevance for today. In a next step, prevailing relations between tribal structures and kinship relations will be assessed through a long-distance comparison between the medieval constellations in the Zaydi highlands of Yemen and elsewhere in Asia for an eleventh century time horizon. Thirdly, the outcome of this comparative analysis should then provide some indicators for a fresh assessment of existing source materials through anthropological perspectives, with special emphasis on gender, kinship and hierarchies. The argument concludes with a discussion of “multiple histories”, and how to approach and write them.     

实录体起源、发展与特点

实录的直接源头是起居注 ,实录仅是名称借用 ;实录体的编年性 ,是由起居注的编年性所规定的。编年体与实录虽问为编年史 ,但记录单位不同 ;前者是多帝多朝史 ,后者是一帝一朝史 ,单位更小 ,内容更详。最初出现的实录为“今上实录” ,唐代始逐步向“前上实录”过渡 ;五代、宋、元、明、清的实录编纂 ,完全规范化 ,是清一色的老皇帝实录。实录体有两种模式 ,一有大臣附传 ,如唐、宋、明 ;一是大臣传单独成书 ,如元朝与清朝。实录是最基本的皇家历程史长编 ,实录的传播与否 ,直接决定民间当代史撰修活动的兴衰。     

《通典·吐蕃传》的史料价值

《通典》是第一部为吐蕃设立专传的史书 ,包括三个方面的内容 :第一 ,吐蕃的族源风俗与典章制度 ;第二 ,吐蕃大事记及唐蕃关系大事纪年 ;第三 ,吐蕃大相论钦陵与唐朝使者郭元振的长篇对话及郭元振上疏文。本文认为《通典·吐蕃传》是唐代人所著唐代吐蕃史 ,可靠性更高 ,同时也保存了不少为两唐书“吐蕃传”所忽略的珍贵史料 ,值得研究者给予新的重视。     

博物馆文物的防震保护研究（三）——陈列文物的地震安全性分析

通过分析博物馆馆藏文物的悬吊、固定、浮放等基本放置形式,探讨了文物的陈列特征及其可能造成的震害因素。综合考察和分析研究了国内外浮放式物体及陈列文物的运动状态,指出陈列文物在地震发生时的主要危害性运动是滑移和倾覆。根据相关浮放物在地震作用下的计算方法、上海博物馆文物的陈列特征及防震设计参数,提出简便实用的浮放式陈列文物稳定性计算模型,编制了适合上海博物馆文物安全性分析的计算程序。并以上海博物馆文物陈列的3类接触材料、4楼中国古代玉器馆的典型陈列文物为试点,计算了陈列文物在地震中遭受破坏的临界值。表明在设防水准的大震和中震情况下,目前陈列现状的绝大多数文物均存在倾覆和滑移安全隐患,但当文物所受到的地震动减小到110gal时可满足陈列安全。     

安徽省图书馆藏《正德三年进士登科录》的修复

2013年初,为配合古籍数字化,安徽省图书馆开始修复馆藏《正德三年进士登科录》。通过分析破损现状、查找相关资料、咨询修复专家、制订修复方案、选配纸张、清洗书页、修补书页、书皮及托纸、修整书页、装订书册、残片修复与函套制作、完善修复记录,经精心修复,修复质量合格、效果满意。论文着重探讨了"古籍修复需要讲究依据"、灵活运用"修旧如旧"原则、保留修复资料等相关问题。此修复研究可为行业修复此类古籍提供相关借鉴。     

论《三国史记》的编撰方法、历史观及史学思想

《三国史记》在编撰方法上借鉴了中国古代史籍的编撰体例和原则,体现曲编年体和纪传体的某些特点,同时又具有自己的编写特点;在历史观上,《三国史记》不仅体现出中国古代史籍中所具有的正统史观、天命史观以及尊儒崇礼、重民观念等史学思想,还体现了它以中原王朝为正统的史观。