TORSIONAL EFFECTS IN THE PUSHOVER-BASED SEISMIC ANALYSIS OF BUILDINGS

The general trends of the inelastic behaviour of plan-asymmetric structures have been studied. Systems with structural elements in both orthogonal directions and bi-axial eccentricity were subjected to bi-directional excitation. Test examples include idealised single-storey and multi-storey models, and a three-storey building, for which test results are available. The response in terms of displacements was determined by nonlinear dynamic analyses. The main findings, limited to fairly regular and simple investigated buildings, are: (a) The amplification of displacements determined by elastic dynamic analysis can be used as a rough, and in the majority of cases conservative estimate in the inelastic range, (b) Any favourable torsional effect on the stiff side, which may arise from elastic analysis, may disappear in the inelastic range. These findings can be utilised in the approximate pushover-based seismic analysis of asymmetric buildings, e.g. in the N2 method. It is proposed that the results obtained by pushover analysis of a 3D structural model be combined with the results of a linear dynamic (spectral) analysis. The former results control the target displacements and the distribution of deformations along the height of the building, whereas the latter results define the torsional amplifications. The proposed approach is partly illustrated and evaluated by test examples.     

Characterization of elemental and firing-dependent properties of Phlegrean ceramics by non-destructive ED-XRF and NMR techniques

A combination of energy dispersive X-ray fluorescence (ED-XRF) and 2D proton nuclear magnetic resonance (¹H NMR) relaxometry was employed for the characterization of two groups of similar ceramic fragments from the high-medieval production of the Phlegrean area (Miseno and Cuma, Southern Italy). Both methods are based on the use of non-destructive and portable instruments. This approach allows to correlate complementary microstructural features of ceramics, both dependent and independent of the firing technique.     

大陆学者《黄帝书》与《老子》思想渊源研究述评

帛书《黄帝书》出土以来,有关其与《老子》的思想渊源,尽管并不是大陆学界研究的重点,但学者依然从道、辩证法、虚静无为、法治、语言、论证方式等几方面陆续进行了探讨,并已取得了相当成就,整个研究也呈现出越来越客观、独立、完整的趋势。与此同时,有关《黄》、《老》思想渊源的研究,还存在着诸如概念混淆、不够重视相关出土文献、独立研究较少、条块分割等种种不足,从而给我们留下努力的空间。     

关于抗美援朝战争史研究的几个焦点问题

抗美援朝战争是新中国成立初期美国侵略当局强加给中国人民的一场战争,也是新中国历史上第一场战争。这场战争为新中国的巩固、建设和发展奠定了基础,是新中国的立国之战。自20世纪90年代以来,随着中国、俄罗斯陆续公布和解密了一批有关抗美援朝战争(朝鲜战争)的历史档案,翻译出版美国、韩国、日本等学者研究著作的增多,研究中出现了许多不同认识。中国人民为进行这场战争付出了重大代价和牺牲,应对这场战争的必要性、正义性和积极意义应给予正确评价。     

试析约翰逊政府对中美大使级会谈的策略与意图

约翰逊政府时期,美国一方面把中美大使级会谈作为应对批评美国对华政策缺乏灵活性的挡箭牌,把中美僵硬对峙的责任推给中国;另一方面,随着国际局势的变化,开始把中美大使级会谈作为与中国联系的潜在的、有用的渠道,避免两国发生直接武装冲突。约翰逊政府与尼克松政府对会谈的不同立场,说明20世纪60年代中美关系是由美国对华政策决定的,美国在中美关系中占据主导地位。     

Who were the Meroites? A biological investigation into the Nubian post‐hiatus group

Scholars have identified a hiatus in the archaeological record of Lower Nubia that spans approximately 1000 years. This interval may represent a desertion of Lower Nubia by its inhabitants. Evidence of occupation did not reappear in the area until the Meroitic time period. However, the identity of the returning people has been the subject of speculation. In order to determine who the Meroites of Lower Nubia were, 20 cranial non‐metric traits were observed on six Nubian groups, representing five time periods. Two groups date to time periods immediately before (Kerma) and immediately after (X‐Group) the Meroitic period. Three additional Nubian groups (two Christian samples from different sites and Sesebi, a contemporary sample) were utilised as outgroups to elucidate a clearer picture of the relationship among the six samples. Mahalanobis D² with a tetrachoric matrix was employed for calculating biological distances among the groups. Principal coordinates analysis produced two clusters of Nubians, where the Meroitics clustered with other Nubian groups. Specific distance scores indicate the Meroites were biologically similar to individuals from the time periods prior to and after their arrival in Lower Nubia. The Meroites therefore appear to be a Nubian group returning to Lower Nubia after its desertion. Copyright © 2009 John Wiley & Sons, Ltd.     

河南淅川县阎杆岭38号汉墓的发掘

2005年9月,为配合南水北调中线丹江口水利枢纽加高工程,河南省文物考古研究所对阎杆岭墓群Ⅱ区的 38号墓进行发掘。该墓为“甲”字形积石积炭墓,墓室四壁和墓底积石积炭,出土鼎、罐、瓮、壶、仓、灶、井、磨、坛等陶器以及铜弩机、铜五铢钱、铁剑共计50余件,年代为西汉晚期。如该墓墓室四壁和墓底积石积炭墓应是丹江流域汉墓的地方特点,为汉墓以及相关问题的研究提供了新资料。     

Food Rituals and Their Social Significance in the Mid‐Second Millennium BC in the Southern Levant: A View From Megiddo

Ceremonies involving intentional burial of animals with humans are acknowledged to bear religious, social and political connotations, and we explored both the ritual activity and the social trajectory of these activities. To date, these ceremonies have rarely been examined within the context of nearby daily activities. We studied faunal remains associated with intramural burials in comparison with contemporaneous daily life in the midsecond millennium bc at Tel Megiddo, as well as comparison with concomitant extramural burials and locations of public feasts. Our study highlights the human interaction with animals that are not often treated as bearing social meaning or having interrelationships with human, the livestock animals. We demonstrate that livestock animals in the second millennium bc had a significant social role as well as economic value. The choice of animals consumed and sacrificed in these rituals is strongly related to the animal's symbolic potency and is based on the desired social message that the population aims to convey. Finally, the form of luxury food that is found in the Megiddo funerary rituals supports the hypothesis regarding the intramural burials' role in creating and enhancing social family bonds. Copyright © 2017 John Wiley & Sons, Ltd.     

Migration of metamorphic CO2 into a coal seam: a natural analog study to assess the long‐term fate of CO2 in Coal Bed Carbon Capture,Utilization, and Storage Projects

This study assesses the displacement of coalbed methane by CO₂ migration along a fault into the coal seam in the Yaojie coalfield. Coal and gas samples were collected continuously at various distances in NO.2 coal seam from F19 fault. Vitrinite reflectance, maceral, and pore distributions and proximate analysis of fourteen coal samples were performed. Gas components, concentrations, carbon isotopes of 28 gas samples were determined. We examined the coal–gas trace characteristics of coalbed methane displaced away from the fault by CO₂ injection after geological ages. From east to west, away from the F19 fault, the CO₂ concentration decreased, whereas the CH₄ concentration increased gradually. The δ¹³C values for CO₂ varied between ?9.94‰ and 1.12‰, suggesting a metamorphic origin. A wider range of values (from ?9.94‰ to 20‰) was associated with the mixing of microbial carbon dioxide, isotopic fractionation during CO₂ migration through the microporous structures of coals, and/or carbon isotope fractionation during gas–water exchange and dissolution of CO₂. Away from the F19 fault, the volumes of micropores, mesopores and macropores decrease gradually. The Dubinin–Radushkevich (DR) micropore volume decreased from 0.0059 to 0.0037 cm³ g^‐1, and the mesopore and macropore volumes decreased from 0.066 to 0.026 cm³ g^‐1. The CO₂ injection can mobilize aromatic hydrocarbons and mineral matter from coal matrix, resulting in the decrease in the absorption peak intensity for coal samples after supercritical CO₂ treatment, which indicates that chemical reactions occur between coal and CO₂, not only physical adsorption.     

“山东定陶王墓地（王陵）M2汉墓保护工程”设计研究

山东定陶王墓地（王陵）M2汉墓为目前我国已发掘规模最大的“黄肠题凑”汉墓,201 3年被公布第七批全国重点文物保护单位.20 14年,中国文化遗产研究院组织编制的“山东定陶王墓地（王陵）M2汉墓保护工程方案”获国家文物局审批通过.本文概述了“山东定陶王墓地（王陵）M2汉墓保护工程”的项目背景、项目设计、任务分解及各个子项目工作的开展情况.