SEISMIC ENERGY DEMAND IN STEEL MOMENT FRAMES

The present paper investigates the seismic energy demand in steel moment-resisting frames. The frames, with 3, 6 and 10 storeys, and 4 and 8 spans, are designed according to current seismic code provisions. The energy response (energy quantities and their distributions) in the frames subjected to an ensemble of six earthquake ground motions recorded on different soil conditions, is investigated by nonlinear time history analysis. The study concludes that (1) the results of energy response can be developed into a rational method of seismic evaluation and design for steel moment-resisting frames; (2) the energy concept based on the single-degree-of-freedom has limitations when extended to the realistic structural system for design purposes; and (3) it is necessary to develop the energy-based approach for seismic evaluation and design based on the seismic response of a realistic multi-degree-of-freedom structural system.     

Ivane Tarkhnishvili (Tarchanoff): A Major Georgian Figure from the Russian Physiological School

This article is dedicated to one of the outstanding scientists of the nineteenth century: Ivane Tarkhnishvili (Tarchanoff), a Russian physiologist of Georgian origin who graduated from the St. Petersburg Medico-Surgical Academy and worked under the supervision of the founder of Russian physiology, Ivan Sechenov. Among his numerous contributions was the discovery of the skin galvanic reflex; however, Tarkhnishvili's most significant contribution was the discovery of the influence of X-rays on the central nervous system, animal behavior, the heart and circulation, and embryonic development. Indeed, these works have given rise to a new field in science (radiobiology).     

中部地区典型煤炭城市接续产业响应模式分析及比较

在煤炭城市转型的基础上采取适宜的转型路径和适当的响应模式,是煤炭城市实现可持续发展的必须条件。本文基于产业生命周期发展理论,在确定中部地区典型煤炭城市接续产业的前提下,利用SOFM模型,将中部地区典型煤炭城市发展接续产业响应模式进行了系统分类,并确定了具体的四类响应模式及相应阶段的特征,最后针对城市煤炭城市接续产业响应模式提出了相应的政策建议。     

蒙东地区与东北三省煤炭资源开发的区域合作研究

我国蒙东地区与东北三省煤炭资源开发的区域合作是建设新兴的蒙东资源基地和振兴东北老工业基地的必然要求。通过在蒙东地区及东北三省的深入调查,发现这两大区域煤炭资源开发的区域合作已经形成一些典型案例,可以分别从上级政府强势干预、地方政府积极推动、中央、地方、企业联动、企业自发参与这四种模式来认识这些案例所反映的区域合作特征、效应与问题。为深入推进蒙东与东北三省煤炭资源开发的区域合作,政府干预应着重协调区域合作的地区格局,促进企业的多元参与,建设跨地区运输通道与生态工程,推进地方政府间的配合与协调。     

传统村落文化对城乡一体化的统筹性响应机理

后改革时代中国的城乡发展亟需改变以往城市偏向型发展观导向下忽视甚至漠视乡村的发展,逐步转向区域同步发展观下的城乡统筹协调发展。城乡一体化实质上是城乡联动发展中不断实现城乡文化共融的过程。传统村落是整体上延续并传承了我国优秀传统文化的典型乡村聚落,乡土文化是其区别于城市文化的独特价值所在。本文从文化地理学视角,从"地方性"角度重新定义传统村落并剖析其文化空间和空间的文化价值,探讨城乡一体化对传统村落文化及其空间演变的综合影响,最后提出传统村落文化对城乡一体化的统筹性响应策略。     

Climate change and Zhou relocations in early Chinese history

In Chinese history, the development of the Zhou tribes and the dynasties that succeeded them between 3550 and 2200 BP in the middle reaches of the Yellow River is known as the period of ‘Five Relocations’. Most of these relocations appear to have been forced by the pressure of nomadic invasions and occupations from the northern steppe. Historians simply attributed these relocations to political and military causes. However, palaeoclimatic studies show that the Zhou tribes and their successor dynasties developed at the demise of the Holocene Climatic Optimum when regional climate became highly variable and unstable. An integrated analysis of environmental change over the Loess Plateau and the Mongolian steppe facilitates a credible understanding of the linkage between climatic events and these relocations. It indicates that the relocations caused an expansion or contraction of the settled regions over the drought-prone semi-arid lands. During climatic amelioration, dry farming societies pushed upward to the Loess Plateau where increased precipitation and soil moisture allowed cereals to be cultivated. When hit by droughts and the associated disasters, both the dry farming societies and the nomadic tribes had to move southward to find an environment suitable for their food production. Migration and relocation were, therefore, basic strategies to secure the resources necessary to sustain an agricultural economy. The settled frontier was pulled back as dry farming societies from the upland plateau retreated to the lowland riverbanks of the Guanzhong Basin. Even though there were political and military intentions, climatic events played an essential role in the relocations of the Zhou tribes and the successive dynasties.     

External Auditory Exostoses and its Relationship to Prehistoric Abalone Harvesting on Santa Rosa Island,California

Bioarchaeological research among prehistoric Pacific Coast populations has shown that external auditory exostoses (EAE) are found in high frequencies. On California's northern Channel Islands archaeological research has demonstrated that there was an intense exploitation of red abalone (Haliotis rufescens), particularly between ~8000 and 3500 years ago. If the Island Chumash were free‐diving for red abalone in subtidal waters, EAE should be prevalent in prehistoric populations from Santa Rosa Island. We recorded the presence or absence, number, side and severity of EAE growths for 207 adult individuals from three time periods on Santa Rosa Island. Our results show that ~11% of the total population was affected, including 22.5% of males and ~3.4% of females. The incidence among females increases from 0% in the Early period, to 2.6% in the Middle period, and 6.8% in the Late period. Overall these are lower rates than those reported for other Channel Island and Pacific Coast sites. Given the relatively low percentage of Santa Rosa Islanders affected with EAE, red abalones may have been harvested primarily in shallow waters rather than the deeper subtidal zone. Our data suggest that gender differences in food procurement activities existed on Santa Rosa Island throughout prehistory, congruent with the argument that EAE is an activity‐induced pathology that occurs with prolonged exposure to cold water and wind conditions. Copyright © 2015 John Wiley & Sons, Ltd.     

Cultural Site Formation Processes in Maritime Archaeology: Disaster Response, Salvage and Muckelroy 30 Years on

Thirty years after Muckelroy's seminal 1976 paper on shipwreck site formation, research on the cultural processes which contribute to the creation and modification of shipwrecks remains limited. It is proposed that by adopting a process-oriented framework, we can integrate and synthesize the documentary, oral and archaeological evidence of human response to shipwreck into a structure which parallels the physical progress of the disaster. Possible cultural responses to shipwreck are considered, from pre-voyage planning through to post-impact salvage, including physical correlations potentially visible in the archaeological record.
© 2006 The Author     

Dome of the Basilica of Santa Maria Degli Angeli in Assisi: Static and Dynamic Assessment

This study presents the results of the static and dynamic assessment of the dome of the Basilica of Santa Maria degli Angeli in Assisi, designed by Galeazzo Alessi. The first section is devoted to an overview of the masonry domes designed by the Italian architect and focuses on the structural solutions adopted in the several cases described to better understand Alessi’s designing skills. In the second part, the drum-dome system is analyzed in order to attain a structural assessment. The static assessment is performed by means of limit analysis and finite element model approaches with non-linear mechanical behavior. The obtained results are consistent with the detected crack pattern and confirm the suitability of the reinforcement steel rings applied to the drum. The seismic assessment has been performed by response spectrum analysis. Due to the lack of specific information, a probabilistic approach for the material mechanical properties was used. The results obtained highlight an adequate seismic response of the structure that can be attributed to the dynamic properties of the slender drum-dome system. This finding justifies the good performance of the structure during the seismic events of 1832 and 1997.