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层板销接木(DLT)是仅由木销和层板组成的一种无胶无钉、近似全实木的工程木产品,可用于制作梁、墙体和楼板,具有用材经济、绿色低碳和预制化程度高等特点. 从构造和分类两方面对DLT进行简要概述,系统梳理了近些年DLT在木销、木销节点及构件方面的性能研究成果,包括木销-层板销槽承压性能、木销节点抗剪性能、DLT木梁抗弯性能及DLT板振动特性等. 在此基础上,介绍了DLT在性能研究中存在的不足,并提出了DLT研究亟需解决的关键问题. 相似文献
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针对零层板结构施工模板问题,对比分析了采用砖胎模与木胎模的工艺及成本,得出砖胎模成本高于木胎模的结论,指出在施工过程中采用支设木胎模会明显降低施工成本,能大幅提高施工企业经济效益。 相似文献
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随着经济的快速增长,我国建筑行业得到了缝勃发展,在建筑工程施工中,转换层板的混凝土施工普遍得到使用。本文结合工程实例;分别从混凝土的原材料、配合比、混凝土性能、施工工艺、温控与测温等多方面对转换层板的混凝土施工及相关问题进行详细的阐述和分析,以供参考。 相似文献
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层板钉接木(NLT)一种重型木结构产品,相对于层板胶合木,其用钉代替胶实现层板间的结合,具有生产便捷、用材经济、形式多样等优点,近年来虽越来越受到关注,但研究相对较少。综述NLT在竖向荷载作用下承载性能方面的研究现状,包括层板及其共同作用效应、钉的类型和层板搭接等因素对NLT性能的影响、NLT-混凝土组合楼板性能等。 相似文献
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针对上海宝隆宾馆改扩建工程实际,对基坑围护结构进行受力分析并对施工方案合理优化,实施了先施工顶板后施工地下二层板再施工地下一层板的越层逆作施工技术,节约了大量的成本及工期,又满足了环境及技术要求。 相似文献
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介绍了建筑装饰工程应采用的低压电网系统的接地形式,从电气线路的防火、配电箱防火、照明灯饰防火及过载零线的防火等方面对电气防火设计要点进行了阐述,以保证建筑装饰工程的安全与防火质量。 相似文献
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There is a rapidly expanding market for green building materials. Such materials are intended to be environmentally friendly, with such characteristics as low toxicity, minimal chemical emissions, ability to be recycled, and durability. In addition, green materials often contain recycled and/or bio-based contents. Consequently, some green materials may undergo significant oxidation with potential for reduction of indoor ozone. In this study, 48-L electro-polished stainless steel chambers were used to study the reactive consumption of ozone by ten common green wall, flooring, ceiling, and cabinetry materials (perlite-based ceiling tile, unglazed ceramic tile, natural cork wall-covering, aluminum tinted cork wall-paper, bamboo, UV-coated bamboo, wheat board, UV-coated wheat board, sunflower board, and UV-coated sunflower board). Ozone removal was quantified in terms of deposition velocity and reaction probability. Ozone removal decreased with time after initial exposure, but for several materials the ability to react with ozone was regenerated after a period of zero ozone exposure. Test materials found to have the highest ozone reaction probabilities were a perlite-based ceiling tile, natural cork wall-covering, and wheat board. 相似文献
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《Fire Safety Journal》2001,36(3):241-268
Described in this paper is a structural response model, FIREFRAME, for determining deflections, stresses and times to failure of gypsum board clad light-timber framed walls exposed to realistic fires. The model was developed for use in accordance with performance-based building fire regulations. To determine dominant phenomena to be modelled, experimental observations were undertaken. These phenomena, although complex, are simply modelled with common frame analysis methods. The validity of the model was checked numerically and experimentally. The model is fast, robust and numerically accurate giving predictions within 2.0% of solutions obtained with closed-form and finite element methods. Good comparisons are demonstrated between experimental measurements and model predictions for fire-exposed walls in common building construction. The failure time of slender walls, however, was overestimated with the model. Improvements to modelling creep in wood in compression at approximately 100°C are required. From modelling results it is apparent that gypsum board and studs can be modelled as fully composite, provided strength and stiffness of gypsum board is assumed to reduce quickly to zero as temperatures in the board rises above 100°C. 相似文献
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连续梁板计算方法的分析 总被引:1,自引:1,他引:0
目前,对钢筋混凝土连续梁板在竖向荷载作用下的计算,常用的有两种方法,即按弹性方法计算和按塑性方法计算,两种方法各有不同的力学依据,其计算结果乃至经济也有较大判别,更好地了解这两种方法是合理设计连续梁板的关键,并对连续梁板按弹性和塑性两种方法计算作了对比分析,同时介绍了两种方法不同的适用范围,以求更合理地设计连续梁板。 相似文献
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针对带肋筏板肋梁内力传统计算方法的局限性,采用无单元法建立筏板的刚度矩阵,同时采用有限元法计算肋梁的刚度矩阵,根据虚功原理,建立了双参数弹性地基上带肋筏板的无单元和有限元耦合计算方法,并通过实例计算验证了该法的可行性。 相似文献