共查询到20条相似文献,搜索用时 125 毫秒
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在全球生态危机的背景下,我国建筑业面临着巨大的环境压力.如何减少建筑能耗以及温室气体排放,推进我国绿色建筑的发展迫在眉睫.木结构建筑作为最名副其实的绿色建筑,其发展符合我国推行绿色节能建筑的方针.总结了我国木结构建筑发展中存在的主要问题,然后通过当今国内外木结构建筑先进的技术解决这些问题,最后为加快发展我国木结构建筑提出几点建议. 相似文献
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现代木结构建筑绿色低碳,具有很强的环境适应性,近年来不断发展,具有广阔前景。我国严寒及寒冷地区(以下统称寒冷地区)的木结构建筑历史悠久,而建筑体系却因技术受限发展缓慢。以呼伦贝尔地区的木结构建筑为研究对象,通过对该地区寒冷气候条件下木结构建筑的发展历史、结构形式、建筑材料的选择进行探究,分析总结其建造特点和营造工艺,研究结果可为木结构建筑在我国寒冷地区的发展提供指导,有利于传统技艺的传承和保护,同时,对现代木结构建筑在新时期的设计提供理论和实践参考,推动木结构建筑的可持续发展。 相似文献
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日本木结构的发展历程与现状 总被引:1,自引:0,他引:1
日本是一个地震、台风多发国家,其木结构的发展虽非一帆风顺,但得到了举世嘱目的发展.日本木结构建筑文化和技术曾被誉为世界之冠.了解日本木结构的发展与成功经验,对促进我国木结构健康、稳步的发展具有重要的作用.本文介绍了日本木结构的发展历程及现状. 相似文献
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对木材表面进行颜色功能性改良是提高木材使用价值的重要途径。文中总结传统木材染色和诱导变色工艺的发展现状及存在的问题,提出利用结构色进行颜色改良是一种清洁无污染的生态仿生着色技术,综述其在木质材料领域中的研究现状,并从木质材料表面结构色构筑及机理、木质材料表面结构色的光响应及界面机理、木质材料表面仿生结构色薄膜大规模应用技术、木质纤维素纳米晶结构色薄膜制备及其功能拓展4个方面提出研究展望。 相似文献
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S. -I. Gustafsson 《Wood Science and Technology》1996,30(5):339-345
Summary Chairs and other furniture are seldom designed by help of structural mechanics and modern computers. Even if the designer uses a sophisticated CAD program, he, or she, will not use for example, finite element programs, FEM, in order to optimise the construction. Most furniture is made of wood or wood composites. Usually, structural mechanics is used for designing wood members in roof constructions and so forth. Because of the consequences of a breakdown, the allowable design stresses must be very low, about one third of the measured breaking strength. Smaller wood details could be chosen with more care and for chairs the result of a break would not necessarily lead to a disaster. However, a lot of the knowledge about how to design small wood structures emanates from the pre-war aeroplane industry. The difference between tensile and compression strength properties in wood also makes ordinary FEM programs hazardous to use because the background theory assumes that these properties are equal in magnitude. In this paper we show how to calculate the internal stresses of an undetermined chair frame and also show some material test results for Swedish alder, Alnus glutinosa.This work has been financed by NUTEK, the Swedish National Board for Industrial and Technical Development. The author also wish to thank Dr. Lars Bernspång at the Luleå University of Technology, division of structural mechanics, for invaluable help with all calculations 相似文献
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重组竹木因具有原料利用率高、生产效率高和产品附加值高的特点,被广泛用于室内地板、家具、建筑结构材、装修装潢材及户外用材等领域。在我国提出“双碳”战略的背景下,全面推进竹材建材化已成为建筑领域实现“双碳”目标的关键举措之一,而研发适合的竹结构材生产设备是实现竹材建材化的关键。本研究设计了一种竹木重组材料连续压制设备,其结构特点是进口为契口式连续进料,模腔由多个单向折合式履带前后连接而成,环形连接实现连续辊压。该设备能压制出任意长度的竹木重组结构材方料,可以满足各种竹木建筑结构长度用材。 相似文献
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随着木结构行业的快速发展,木构件数控加工成为行业发展的必然趋势。但国内对专业木结构数控加工中心研发很少,主要依赖价格和操作技术门槛高的欧美进口加工中心,导致国内木结构建筑成本高,因此亟待开展国产木结构数控加工中心研发,促进木结构产业快速发展。文中主要围绕木结构数控加工中心的产品技术,从国内外加工中心产品现状、主要技术进展和未来展望3个方面进行综述,介绍德国、意大利等发达国家水平较高的数控加工中心的产品及功能参数以及国内数控加工中心产品及技术现状,分析目前木结构数控加工中心的主要技术进展,总结国内木结构数控加工中心存在的问题,并在此基础上展望国内加工中心通用化、高性价比、定制化和智能化的发展方向,以期促进国产木结构建筑构件数控加工中心的研发,为木结构企业提供高性价比的数控加工中心产品和稳定的售后服务。 相似文献
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Guofang Wu Enchun Zhu Yong Zhong Yingchun Gong Haiqing Ren 《Journal of Wood Science》2018,64(4):356-363
Small diameter logs from juvenile trees are heavily produced during the management of artificial forests around the world. As a kind of plentiful and inexpensive natural resource, the potential was not fully explored. So far the small diameter logs are mainly used as raw materials for products other than building materials. To utilize these small diameter logs originating from juvenile trees as structural members into wood construction, a kind of hybrid built-up column was developed and the performance was investigated experimentally and theoretically. It was found that column had good load-carrying capacity. To apply the developed member in wood construction, the prediction method of the column was proposed. The effective slenderness ratio which took the shear deformations due to the bending of limbs and slip of nail connections between U-shaped nails and limbs into consideration was derived based on mechanics theory. The proposed prediction method was found to have good accuracy in predicting the load-carrying capacity of the hybrid built-up column. This paper can promote the structural application of the small diameter logs originating from juvenile trees. 相似文献
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Thomas Bornemann Christian Brischke Gry Alfredsen 《Wood material science & engineering》2014,9(3):144-155
AbstractOne key issue in wood construction is durability. Constant wetting and suitable temperatures for fungal growth promote the risk of decay and thus a decrease in structural stability and performance. Hence, performance-based prediction models seem to be reasonable to predict the in-service performance of wooden structures in different outdoor exposure situations. Within this study continuous wood moisture content (MC) and temperature measurements were conducted on five different test objects. Four test set-ups were installed at a test site in Hannover, Germany. A fifth set-up was exposed in Ås, Norway. Data-sets were applied to a dose–response performance model considering wood MC and temperature as key factors for fungal decay. The expected service life (SL) was calculated for different materials and constructions. In addition, the depth and distribution of decay was assessed using a pick test and compared with the calculated SL. Differences regarding the risk of fungal decay for various construction details, exposures and materials were quantified. A wide range of SL estimates was estimated and significant differences were found between the various components, design details and wood species. Furthermore, results from the decay assessments were used to verify the performance model. Recommendations for improvements were provided. 相似文献