Flexural Behavior of Typical Chinese Traditional Timber Stitching Beams

In Chinese traditional timber buildings, stitching is very common. When the bearing capacity or the rigidity is inadequate, a timber beam is often strengthened with another beam using the stitching method. The timber stitching beams are mainly of two types—the small-top/big-bottom type and the big-top/small-bottom type. To study the bending behavior of these two types of timber stitching beams, including the failure mode, the flexural capacity, the strain distribution at mid-span section, and the maximum deflection, bending tests are carried out on 14 timber stitching beams with Chinese traditional conformation for seven pine beams and seven fir beams. The results show that the failure modes of the small-top/big-bottom type of stitching beams all show brittle fractures at the bottoms of the bottom beams. The failure modes of the big-top/small-bottom type of stitching beams all show brittle fractures at the bottoms of the top beams. The distribution of section strain along the height of each part of the beam basically obeys plane hypothesis. Based on the theoretical and experimental analysis, the calculation formulas of flexural capacity and maximum deflection of these two types of timber stitching beams made of pine and fir are presented.     

Picking up the Pieces: Goa's endangered traditional craft

Three sewn boats surveyed in 1838 are used to evaluate traditional Goan sewn craft. Types additional to those recorded in the 19th century were located during fieldwork. The West Coast provided an abundance of raw materials exported to countries which lacked them; unknown is the extent of the export of local expertise. A consistency of sewing methods, materials, waterproofing, and antifouling are evidence for an indigenous boatbuilding tradition. In Goan pirogues the weight of the crew and nets is carried at the level of the sheer‐strake seam. In prehistory large pirogues of Goan type could have made long‐distance voyages using an outrigger to confer stability. To date archaeological evidence is lacking.     

山地传统村落空间系统风险研究——以重庆为例

选取风险源、风险受体状态、风险响应三个方面16个指标,以外部自然、人文因素、传统村落内部景观和建筑结构等为切入点,构建山地传统村落空间系统风险评价体系,分析重庆市110个传统村落空间系统风险,并针对性地提出保护建议。研究表明：(1)构建的风险评价体系能够综合反映山地传统村落空间系统外部压力和内部脆弱性,体现其空间差异。(2)重庆市传统村落空间系统风险属较高及以上等级的有42个,占村落总数的1/3以上,主要分布于渝东南武陵山中山地区,如酉阳、秀山等地。(3)风险等级较高及以上的传统村落,应提升主体风险防范能力,合理规划村落发展,避免城镇边界扩张挤压传统村落空间,导致其非自然性衰落。山地传统村落空间系统风险研究从宏观揭示风险驱动因子,识别风险胁迫大小,对传统村落精准保护具有重要意义。     

Views and Commentaries: Composed Versus Simple Pasts: About Archaeologists and Their Partners

Partnership is an equitable exchange of knowledge. In fact, the very nature and indisputability of imported and taught knowledge—the scientific one and here archaeological—question the nature of the traditional and ordinary knowledge of peoples concerned. These two kinds of knowledge differ in the nature of the facts recognized by each of them: scientific facts or tacit common knowledge facts built differently, and in the number and strength of the external allies they succeed in mobilizing. Even if they remain translatable one into the other at a certain cost, they are engaged in a race. The result seems lethal for traditional knowledge unless powerful nonscientific allies, opposed to this leveling standardization, get involved with researchers aware of the stake for the South but also for the North, committed for some centuries to a rationalization supported by science, its technics, and the socioeconomic powers able to fund them.Le partenariat est un échange équitable de savoirs. En réalité, la nature et l'indiscutabilité du savoir importé et inculqué—le savoir scientifique et ici archéologique—met en cause la nature du savoir ordinaire et traditionnel des peuples concernés. Ces deux formes de savoirs diffèrent par la nature des faits reconnus par chacun d'eux: faits scientifiques ou faits du savoir observationnel ordinaire, construits différemment, et par le nombre et la force des alliés extérieurs qu'ils réussissent à se donner. S'ils sont traduisibles l'un dans l'autre à un certaincoût, une course est néanmoins engagée entre eux. L'issue en semble fatale aux savoirs traditionnels à moins que des alliés puissants non-scientifiques, opposés à ce nivellement uniformisateur, s'engagent à leurs côtés avec l'appui des chercheurs conscients d'un enjeu qui concerne certes le Sud, mais aussi le Nord engagé depuis quelques siècles dans une rationalisation appuyée sur la science, ses techniques et les puissances socio-économiques capables de les financer.     

1884—1939年中药材埠际贸易的变迁研究

中药材作为近代中国贸易格局中的重要商品之一,在口岸-腹地的经济互动中位置显要,研究中药材埠际贸易网络对理解其流通的历史具有重要意义。由于受到调查数据相对零散和研究方法相对传统的限制,该网络的复原少有实质性推进。本文主要利用中国旧海关史料的中药材埠际贸易数据,辅以其他对外贸易数据,对近代的中药材埠际贸易流通网络进行数据分析研究,发现中药材埠际贸易格局的演变与通商口岸开埠的空间进程密切相关。从19世纪末到20世纪20年代,中药材埠际贸易网络呈现逐渐加密的态势,1927年后,因为战争,中药材埠际贸易网络摧毁严重;同时,中药材国际贸易的区域分布却较为广阔,从以中国为中心的东亚区域延伸到欧洲、美洲部分地区。     

南方地区古建筑木结构的整体性残损点指标研究

古建筑木结构的残损点指标是对古建筑木结构进行结构安全评估和加固修缮设计的重要指标,目前主要依据1992年制定的《古建筑木结构维护与加固技术规范》(GB 50165—92)中的规定,为了对该规范中的构架整体性残损点指标进行验证和补充,本研究通过对南方地区传统的穿斗木构体系和抬梁木构体系的典型榫卯节点和构架的试验研究,得出两种木构体系结构的整体性关键残损点指标,并与GB 50165—92规范进行比较分析。结果表明:规范规定的抬梁式木构架和穿斗式木构架的局部倾斜残损点比试验结果小,规范值偏于安全。规范中规定的抬梁式木构架梁柱榫卯连接残损点略小于试验结果,规范值偏于安全;而规范中规定的穿斗式木构架梁柱榫卯连接残损点对于燕尾榫穿斗木构而言是安全的,但对于透榫穿斗木构而言,则是不安全的。     

Village Layout and Social Experience: A Comparative Study from the Northeast Woodlands

This paper examines the spatial configuration of two early fourteenth-century Woodland villages—one composed of longhouses (Nodwell) and one a ring-shaped arrangement of oval huts (Fort Hill). The contrasting spatial layouts of these sites are explored from the perspective of social interaction stress in early villages. Visibility Graph Analysis, a technique for analyzing the relational order of visual fields, is used to measure the properties of spatial integration and control in these settlements over the course of their distinctive occupation histories. Results reveal “top-down” vs. “bottom-up” dispositions toward spatial order that influenced the routine use of settlement space, the nature of village growth, and arguably, long-term trajectories of community development in regional longhouse and ring-shaped traditions.     

铜版组画《平定苗疆战图》初探

本文对《平定苗疆战图》的创作背景、题材选择、艺术水平及乾隆与组画的关系等进行了探讨与评述,对组画作了重新定名,并重新标记了各幅的画题,调整了其排列顺序,对各图作了详细介绍。文章最后阐述了清中期铜版战图创作的若干特色。