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《The IES Journal Part A: Civil & Structural Engineering》2013,6(2):83-105
Plastic design methods can be used for determining the load-carrying capacity of partially anchored shear walls, where hold-downs are not provided. In order to use these methods, a ductile behaviour of the sheathing-to-framing joints must be ensured. Since the forces in the anchor bolts and the sheathing-to-framing joints do not act in the same vertical plane, the bottom rail will be subjected to bending and shear in the crosswise direction, and splitting of the bottom rail may occur. In this article, results of two experimental programmes on the splitting capacity of the bottom rail due to uplift in partially anchored shear walls are presented. Two brittle failure modes occurred during testing: (1) a crack opening from the bottom surface of the bottom rail; and (2) a crack opening from the edge surface of the bottom rail along the line of the sheathing-to-framing joints. The results show that the distance between the edge of the washer and the loaded edge of the bottom rail has a decisive influence on the maximum load and the failure modes of the bottom rail. 相似文献
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突发大客流是轨道交通运营期间主要风险之一,合理的建筑设计、设备设施布置及客流组织,能够提高车站客流疏运能力。根据乘客乘车流程,采用基于木桶理论原理,选择某地铁车站对客流疏运能力进行理论计算,并采用模拟仿真的方法进行验证。结果表明:该站各节点设备设施的布置和数量能够满足客流疏运需求,制约该站疏运能力的因素为站厅闸机通行能力,模拟过程很好的验证了理论计算结果。 相似文献
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2011年4月18日,山推武汉产业园一期项目在武汉东湖新技术开发区落成,山推武汉产业园将成为山推混凝土机械生产基地。武汉市市委常委、武汉新技术开发区党工委书记贾耀斌,中国工 相似文献
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U. Maid 《Tunnelling and Underground Space Technology incorporating Trenchless Technology Research》1999,14(2):131
In this paper, the westernmost of the three bored tunnels in the Betuweroute is outlined: the twin bored Botlek Rail Tunnel. This paper deals with the specific local boundaries and the characteristic design features. Special emphasis is placed on the design of the shield tunnel boring machine. This evolved from a special proposal from the bidding contractors group BTC—a combination of Ballast Nedam, HBW, Strukton, Van Hattum en Blankevoort and Wayss & Freytag—which included an Earth pressure balanced shield (EPB-shield) instead of the slurry balanced shield that was foreseen in the reference design of the Client NS-RIB (Dutch Railways). 相似文献
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《Journal of Urbanism》2013,6(1):72-91
Rail stations are a major element of the overall journey experience, and are essentially the ‘face’ of public transport. A review of historic currents in station design reveals a number of periods in which station architecture was taken very seriously. This paper outlines the history of rail station design – for the benefit of practitioners and researchers from diverse backgrounds in the urban disciplines. A review of the established literature is cross-referenced to a 5-year programme of observational fieldwork around international station exemplars. In doing so, the paper synthesises the state of advanced practice and built form outcomes in station design. The paper also summarises technical aspects of station design that practitioners from across the urban disciplines need to understand in order to work effectively in station-related projects. This advanced understanding of the transport-based performance of stations connects with broader moves toward integrated planning. 相似文献
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介绍了深圳市轨道交通4号线二期工程轨道施工方案,分别对铺轨工程施工范围及内容、控制测量、车辆段铺轨道施工,整体道床道岔施工等进行了具体阐述,对同类工程具有一定指导作用。 相似文献
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对倾斜式施工电梯导轨架作受力分析,并建立力学模型。然后,分别用弹性支承连续梁理论和有限元法,对结构进行稳定性和刚度计算。在有限元分析中,先将结构看作是由梁单元和弹簧元组成的结构,对整个结构连同附壁撑进行分析。然后,对离桥塔较远的几跨,将结构进一步细化,看作是由许多杆单元组成的空间桁架式结构。这些方法不仅适用于倾斜式施工电梯的导轨架,也适用于附着式塔式起重机的塔身和直立式施工电梯的导轨架。 相似文献
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论述了高性能混凝土的性能特征、所用原材料的技术要求以及配合比设计原则,得出高性能混凝土配制的技术手段和工程应用的控制重点.并通过原材料质量控制和配合比设计等方法,使得高性能混凝土在京津城际轨道交通工程中得到成功应用. 相似文献
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采用有限单元法对菱形交分渡线不同扣件刚度下心轨顶宽20 mm和50 mm处进行了强度分析,得出在列车荷载作用下不同扣件刚度对心轨的承载力的影响,为研发菱形交分道岔区轨道扣件提供了参考。 相似文献
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根据深圳市城市轨道交通线网需求,分析了设置现代化、集成化、高效化地铁焊轨基地的必要性.结合焊轨基地用地条件,比选了焊轨基地的U型、N型工艺布局方案,最终确定N型布置方案,体现了集约性工艺设计和集约利用土地的特点,为后续线路及其他城市设置焊轨基地提供参考经验. 相似文献
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桥墩等建筑周围回填区域需使用小型压实机械.因回填区域和其它构造物接壤,容易产生段差和沉降现象,压实作业时需非常注意.无沉降的构筑物和允许一定程度沉降的土方接壤部位,容易产生段差,因此此区域的回填材料需比其它区域材料高一等级,同时有必要采取更加慎重的对策. 相似文献
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一、引言城市轨道交通是以电能为动力、采取轮轨运转方式的快速、大运量的公共交通之总称,包括地铁、轻轨、市郊铁路、有轨电车以及悬浮列车等多种类型。与其他公共交通相比,具有用地省,运能大、耗能低,环境污染小等特点,乘坐安全、舒适、方便、快捷,号称“城市交通的主动脉”。上世纪80年代来,天津、上海、广州先后开始了地铁建设,90年代更多的城市开展了轨道交通的前期建设或可行性研究,发展城市轨道交通已成为目前解决中国大城市交通堵塞的主要途径。飞速发展的轨道交通建设对车辆有着庞大的需求量,根据国内20个城市的预测,每年约需车辆1… 相似文献