共查询到20条相似文献,搜索用时 93 毫秒
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介绍了卡箍式管道连接的工艺特点,结合实践,论述了卡箍式管道连接操作要点和在施工中的应用,分析了卡箍式管道连接的经济效益,展望了卡箍式管道连接工艺应用前景。 相似文献
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钢筋套筒灌浆连接技术是近年来在我国发展应用的新型钢筋连接方式,文章介绍了钢筋套筒灌浆连接技术的原理及国内外发展现状,并结合工程实例,对柳州欧维姆机械股份有限公司研制的钢筋套筒灌浆连接接头的构造、性能、相关试验及施工工艺等进行了介绍. 相似文献
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建筑给水管道连接技术综述 总被引:1,自引:1,他引:0
归纳总结了建筑给水管道的连接方式、连接特点和应用范围,分析了建筑给水管道的连接机理,介绍了各种连接技术在工程中实际应用情况,并指出目前建筑给水管道连接存在的问题,以期促进建筑给水管道连接技术的发展。 相似文献
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近年来,等电位连接在住宅小区工程中得到推广运用。文章首先介绍了住宅楼工程电力安全的隐患,探讨了运用等电位连接的安全作用,和等电位连接操作的标准:观范,最后介绍了基于计算机等电位连接的监控系统应用。希望对后续相关研究有所启发和帮助。 相似文献
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钢结构端板连接高强度螺栓几种施拧顺序的对比研究 总被引:1,自引:0,他引:1
针对钢结构端板连接中高强度螺栓的施拧顺序对螺栓预紧力的影响,对8个试件有针对性地采用3类不同的施拧顺序对高强度螺栓进行施拧,以进行对比研究。根据试验结果及分析,对钢结构端板连接中高强度螺栓施拧顺序提出了建议。 相似文献
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《Fire Safety Journal》2007,42(6-7):408-415
Recent structural collapses caused by fire have focused attention on research concerning fire safety in building design. Steel connections are an important component of any structural steel building, as they provide links between the principal structural members. The evaluation of the performance of steel connections at elevated temperatures has been a topic of several research programmes in the last few years. Determining the behaviour, available strength and stiffness of moment connections in fire conditions has been a dominant theme in these research works; however very little information on the behaviour of simple shear connections in fire conditions has been disseminated. Fin plate shear connections are easy to fabricate and install; as a result, they have gained popularity with fabricators because of their economy. In this research, the robustness of simple fin plate beam-to-column connections is being investigated under catenary tension from highly deflected beams in fire. A highly detailed three-dimensional (3-D) finite element (FE) model has been created using the ABAQUS software. This is a complex model accounting for material and geometric non-linearity, large deformation and contact behaviour. Contact is critical to model the shear behaviour of the joint, and contact elements have been used both at the bolt–hole interface and also at the surface between the web of the beam and the fin plate, taking into consideration friction between the surfaces. The connection model has been analysed through the elastic and plastic ranges up to failure. Bolt shear and bending, and plate and web bearing have been observed as failure modes. A comparison between available experimental data at ambient and elevated temperatures and other analytical results shows that the model has a high level of accuracy. When the connection model was extended to include an attached beam, it was found that it eventually experiences large tensile force when exposed to fire. 相似文献
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焊缝连接广泛应用于不锈钢结构生产和装配领域,但目前国内外专门关于不锈钢焊缝连接承载性能的研究较少。为研究国产双相型S22053不锈钢角焊缝搭接接头的承载性能,对6个正面角焊缝连接试件和5个侧面角焊缝连接试件进行了拉伸试验,测得了焊缝连接在拉伸作用下的极限荷载、极限强度等,并对焊缝随荷载的变形情况进行了测量。试验结果表明:正面角焊缝连接试件破坏截面平均角度约29°,并非45°理论值,其极限强度平均值973MPa,焊缝平均变形量为1.139mm。侧面角焊缝连接试件破坏截面平均角度约46°,比较接近45°理论值,其极限强度平均为637MPa,焊缝平均变形量为1.792mm。正面角焊缝连接试件焊缝极限强度为侧面角焊缝连接试件的1.53倍。 相似文献
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为研究多层钢框架半刚性梁柱端板连接的抗震性能,对8个不同构造端板连接足尺试件进行了循环荷载试验研究, 分析了端板厚度、螺栓直径、端板外伸加劲肋、柱腹板加劲肋、平齐式和外伸式等因素对节点承载力、转动刚度、极限转动 能力、耗能能力、延性和极限破坏状态的影响。试验结果表明,半刚性梁柱端板连接具有良好的延性和耗能能力,可以应用 于多层抗震钢框架中。根据试验结果及相关分析,提出了多层抗震钢框架中端板连接的标准构造为:两端外伸,设置柱腹 板加劲肋和三角形端板加劲肋,柱翼缘在端板外伸边缘上下各100mm范围内局部加厚,厚度与端板厚度相同。对提高端 板连接节点的抗震性能提出了宜采用大直径螺栓、中等厚度端板的设计建议。本文还在"强节点,弱构件"抗震设计一般原 则的基础上提出了"强连接,弱板件"的端板连接抗震设计概念。 相似文献
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Although block shear failure has predominantly been considered a potential failure mode for bolted steel connections, several recent experimental programs have revealed that block shear can also govern the design of certain arrangements of welded connections. The mechanics of block shear failure in welded connections are known to be different from the bolted case, although published research on the subject is limited. A nonlinear finite element model has been developed to study the capacity of concentrically loaded welded lap plate connections that fail in block shear. The accuracy of the model was verified by comparing analytical results to those from physical tests. A parametric study was then completed to quantify the effects of connection geometry and weld arrangement. The results of the study are used to describe the behaviour of welded lap plate connections failing in block shear and to evaluate the performance of block shear design equations for capacity prediction of welded connections with a variety of geometries. 相似文献
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焊接方形钢管桁架结构设计 总被引:5,自引:1,他引:4
对国内外方管、矩形管结构的应用研究现状作了分析,总结了方管、矩彩管桥架焊接节点的受力、破坏特点,介绍了国际上推荐的方管节点设计计算公式,指出了这种结构设计时应注意的问题,并以实例介绍了这种结构的设计过程。 相似文献
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方钢管混凝土柱与钢梁连接的拉伸试验研究 总被引:8,自引:0,他引:8
本文通过对带内隔板的十字形连接节点的拉伸试验,研究了方钢管混凝土柱与钢梁连接的结构性能。借助于在柱翼缘、梁翼缘和内隔板上的应变测量,分析了连接区域的应力传递机制。基于屈服线理论,并考虑连接区域的应变性能,提出了方钢管混凝土柱与钢梁连接的承载力方程,可供制订规范和工程设计参考 相似文献