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V. Sigmund 《Journal of Earthquake Engineering》2014,18(1):113-146
This article presents the experimental results of a study on reinforced-concrete frames infilled with masonry with openings. The frames were designed according to current European codes. They were built in a scale 1:2.5 and infilled with masonry walls. Mid-size window and door openings were located centrically and eccentrically and were executed with and without tie-columns around them. Presence of masonry infill, although not accounted for in design, improved the system behavior (increase in stiffness, strength and energy dissipation capacity) at drift levels of up to 1%. During the test, openings did not influence the initial stiffness and strength at low drift levels. Their presence became noticeable at higher drift levels, when they lowered the energy dissipation capacity of the system. The infill wall had a multiple failure mechanism that depended on the opening height and position. Tie-columns controlled the failure type, independent of the opening type, prevented out-of-plane failure of the infill, and increased the system's ductility. Negative effects of the infill on the frame were not observed. The infill's contribution could be deemed positive as it enhanced the overall Structural Performance Level. Analytical expressions commonly used for infilled frames underestimate the infill's contribution to strength and stiffness and overestimate the contribution of the bare frame. 相似文献
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论民俗旅游资源及其开发 总被引:33,自引:0,他引:33
本文从旅游学与民俗学交叉渗透研究的角度,阐述并分析了民俗旅游资源的主要类型及其基本特征,以此为依据提出并论述民俗旅游资源的四种开发类型、三类开发方式及其三项开发导向原则。 相似文献
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浙北土墩墓遥感考古研究 总被引:4,自引:0,他引:4
环太湖地区包括浙北地区是我国长江流域重要的古文化遗存分布区,仅浙北地区的土墩墓就有上万个。近四年来的遥感考古工作,已获得不少关于土墩墓的影象特征和土墩墓分布规律等的研究成果。航空遥感照片上的土墩墓的影象大小、色调、灰度、形态等是土墩墓解译的基本依据;同时影象所在的地貌部位,海拔高度是土墩墓解译的重要参考依据。浙北土墩墓主要集中在长兴和安吉两县,湖州市郊的西部也有较多分布,而德清和余杭土墩墓较少。浙北土墩墓的分布类型有山脊型、山麓型和平原高地型;浙北土墩墓就形态而言,有卵圆形、圆形;面积也有大中小之分,大者底径可达50余米,小者仅3-5米;另外就土墩墓的组合而言,有串珠型、集群型和离散型。土墩墓集中分布在海拔50-200米的丘陵缓坡上,海拔略高的平原岗地上也有较多分布,这种分布特征与古地理环境是有联系的,从一个侧面反映了古地理环境特征。 相似文献
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报刊的出版发行工作的效果与报刊生产地的空间区位密切相关。目前国内外地理学界对此问题的研究见诸文字的还不多见,这一研究领域急待发展。本文分析了我国报刊生产空间分布特征,划分了报刊生产的空间功能类型区;进行了报刊生产的区域发展趋势预测。 相似文献
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欠发达资源丰富农村旅游业成长模式探讨 总被引:12,自引:0,他引:12
本文在阐述欠发达资源丰富农村概念的基础上,分析了其资源的组合类型,并进行了其旅游开发现状特征及制约因素的分析,从而设计了三类旅游业成长模式,并进行了案例研究。 相似文献
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刘红 《中国文物科学研究》2014,(2):84-87
本文研究中国博物馆的名称、种类及其服务内容的关系,探讨服务内容的定位、发布,以及服务意识和管理方式的改变和提升。 相似文献