共查询到19条相似文献,搜索用时 140 毫秒
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采用LPM轻质材料填充体制成的混凝土空心楼盖可以产生良好的经济效益和社会效益,是绿色环保建筑的优先选择.本文首先对加次梁、实心大板以及LPM轻质材料填充体空心楼盖三种结构形式方案进行经济性能分析比较,分析结果表明采用LPM轻质材料填充体空心楼盖具有降低建造和使用的成本等优点;同时结合工程实例,分析该技术在工程应用中的施工工艺,以及提出该技术在施工应用中的关键技术要点,旨在为该技术的推广应用提供指导. 相似文献
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轻质材料组合单元填充的预应力混凝土现浇空心板”是由清华大学开发的一种新结构技术,这种空心板的突出特点是空心率高,同时又方便施工,混凝土可以一次浇筑。空心板填充所用LPM轻质管是“一种带硬质加强层的轻质发泡材料填充件”。LPM轻质管主体材料为聚苯泡沫,外带加强及隔离层。聚苯泡沫表面密度不得低于15kg/m^3。根据板厚不同,采用不同规格的轻质管。这种技术已经成功应用于2008年奥运会射击馆、 相似文献
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本文主要说明预应力技术在现浇混凝土空心楼盖中应用的特性,着重介绍一种新研制的LPM预应力空心楼盖结构技术,及一些现浇预应力空心板的代表性工程,实践证实在空心楼盖中使用现浇预应力空心板具有技术、经济优势 相似文献
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现浇混凝土空心楼盖是一种新型混凝土楼盖技术,填充体作为这种楼盖的核心组成部分,其材料、形状、性能特点都对所形成的空心楼盖质量有着重要影响。本文系统介绍了空心楼盖填充体的材料性能要求和尺寸要求,同时对目前在工程中常用的填充体的性能特点进行了对比分析,提出了一种填充体的优选方法,即实际选择填充体时,主要考虑方向不应是其力学性能,而应朝着空心率大、重量轻、施工安装方便、不易破损、环保、防火和不损害工程结构质量的方向考虑。 相似文献
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文章从屋面材料、屋架形式、施工流程以及结构设计等方面对轻钢结构平改坡和轻型木桁架平改坡进行了研究与比较,并对平改坡工程的未来发展进行了展望。 相似文献
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现浇混凝土空心楼盖与常见楼盖之间的比较 总被引:2,自引:2,他引:0
根据现浇混凝土空心楼盖的特点,结合工程实例,将其与其他常见楼盖类型进行了比较分析,结果表明:现浇空心板结构与传统井字梁结构相比,有很大的优势,对建筑结构优化设计具有重要意义。 相似文献
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文章阐述了我国建筑平改坡的发展状况,从轻钢结构屋顶形式、屋顶材料的选择、平改坡轻钢结构的设计等几个方面来具体说明了建筑平改坡轻钢结构的应用,并对未来建筑平改坡轻钢结构的发展进行了展望。 相似文献
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《The IES Journal Part A: Civil & Structural Engineering》2013,6(3):127-150
The new 55,000-seat National Stadium is the centrepiece of the Singapore Sports Hub project due to be completed in mid-2014. The stadium features bowl cooling to all spectators as well as the 30,000-seat lower tier being able to be reconfigured and moved to transition from football to athletic and cricket modes. The roof is a highly efficient dome spanning 310 m with a rise of 85 m from the ground level. The fixed roof dome structure will be the largest dome roof in the world covering a stadium and also supports a symmetrical movable roof in two halves. The fixed roof dome structure is formed by a series of arch shaped steel trusses varying in depth from 5 m at the centre to 2.5 m at the base and a post-tensioned concrete ring beam support. These trussed arches are constructed from circular hollow section elements and span in multiple directions and cross the roof opening to form a highly efficient braced dome structure. To manage the design of such a huge multi-element structure, Arup used advanced parametric design software as well as in-house software specifically developed for the project to optimise and exchange information between architect and engineer, and then to fabrication. As well as Arup designing the structure, a second Arup team was engaged by the steel subcontractor to carry out highly complex and challenging connection design. The structure forming the roof is exposed architecturally with the roof having no ceiling or cladding on the underside, meaning that the structural sections and form of the connections are important architecturally as well as structurally. The circular hollow sections used to form the trusses and the truss forms themselves ensure clean and elegant lines within the structure. Due to the movable roof there is a varying load on the structure and fatigue needed to be considered. While the structure is not highly fatigue sensitive, fatigue needed to be carefully considered in the design and form of the connections to ensure that it did not become governing in the design or the structural members. This paper focuses on the architectural concept development, the fixed and movable roof design as well as the post-tensioned concrete ring beam support structure. The paper also describes an exercise to investigate the potential savings in material use that could have been made if higher strength, high elongation steel had been economically viable and could have been competitively tendered. It is shown that it could be possible to make a significant saving on element steelwork if either hot finished Niobium grain refined S500 or S690 could be adopted for similar projects in the future. 相似文献