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低多层轻钢结构住宅具有性能好、自重轻、工厂预制化程度高、建造速度快等优点。它在实践中的应用体系包括:冷弯薄壁型钢体系、纯钢框架体系、框架-支撑体系、钢框架-混凝土剪力墙体系、周围抗侧力体系等。应用时应注意房柱、楼盖、支撑体系、墙体结构、节点抗震等关键部位或部位体系的设计与构建,确保住宅质量。 相似文献
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低多层轻钢结构住宅具有性能好、自重轻、工厂预制化程度高、建造速度快等优点。它在实践中的应用体系包括:冷弯薄壁型钢体系、纯钢框架体系、框架-支撑体系、钢框架-混凝土剪力墙体系、周围抗侧力体系等。应用时应注意房柱、楼盖、支撑体系、节点抗震等关键部位或部位体系的设计与构建,确保住宅质量。 相似文献
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低多层轻钢结构住宅具有性能好、自重轻、工厂预制化程度高、建造速度快等优点。它在实践中的应用体系包括:冷弯薄壁型钢体系、纯钢框架体系、框架-支撑体系、钢框架-混凝土剪力墙体系、周围抗侧力体系等。应用时应注意房柱、楼盖、支撑体系、墙体结构、节点抗震等关键部位或部位体系的设计与构建,确保住宅质量。 相似文献
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为了增加轻钢框架结构的应用范围,基于主次结构的理念,提出了以钢管混凝土柱-钢梁-斜撑为主结构并形成主要抗侧力体系,以主要承受自身竖向荷载的轻钢框架为次结构的结构体系,其中轻钢次框架以循环嵌套的方式与主结构相结合。为研究轻钢次框架的结构形式、钢管混凝土柱-钢梁连接节点、次框架采用预制装配式楼板对主次框架结构损伤特征和抗震性能的影响,按7度0.1g设计并制作了2个按1∶3缩尺的6层钢管混凝土柱-钢梁-轻钢主次框架结构模型。对2个模型分别进行振动台试验,分析了其动力特性和地震响应。试验结果表明:2个缩尺模型在7度0.1g罕遇地震作用下均无明显破坏现象,在8度0.2g极罕遇地震下的最大层间位移角分别达到1/28和1/35,但主要结构构件未出现明显损伤;次框架采用铰接梁柱节点并取消第3层钢柱可明显减小水平地震对次框架受力的影响,且可提高装配率、降低造价;刚性法兰连接节点可确保双向水平地震下钢管混凝土柱端先屈服,能满足连接节点更强的抗震要求;经过构造措施加强的次结构预制楼板与边钢梁有明显的组合空间作用,可对边钢梁扭转形成有效约束。 相似文献
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轻型钢结构住宅体系设计研究 总被引:1,自引:0,他引:1
将轻钢结构体系应用于民用住宅,提出了多层及小高层轻型钢结构住宅体系的设计方法,并结合实例作了经济性分析,结果表明采用方钢管砼结构等轻型钢结构住宅体系具有造价合理,施工快捷,抗震性能好等特点。发展轻钢结构住宅体系有助于住宅产业的现代化。 相似文献
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为了研究混凝土板组合效应对蜂窝梁柱连接抗震性能的影响,对无混凝土板和有混凝土板的正六边形蜂窝梁柱连接、普通组合梁柱连接进行拟静力试验。研究混凝土板组合效应对不同开孔率的蜂窝梁柱连接的破坏形态、承载能力、刚度、延性及耗能能力的影响。试验结果表明:蜂窝梁柱连接可以有效地控制塑性铰在近柱端第一个蜂窝孔处形成,实现塑性铰外移,降低在梁柱连接焊缝处发生脆性破坏的可能性;混凝土板的组合效应可以减小蜂窝梁剪切变形的影响,与无混凝土板的蜂窝梁柱连接相比,有混凝土板的蜂窝梁柱连接的滞回曲线更饱满;混凝土板的组合效应能够提高蜂窝梁柱连接的承载能力、延性、刚度及耗能性能,开孔率越大,组合效应越显著;混凝土板组合效应降低了塑性铰区的转动能力。 相似文献
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轻钢结构加层技术在经济,施工等方面具有明显的优势,但目前这种技术在乌鲁木齐地区的设计和应用还不十分广泛。为了介绍推广这种加层技术。结合具体工程,通过工程实例对乌鲁木齐地区的轻钢加层结构进行设计,主要针对柱脚、反梁的设置、地震效应计算、屋面及围护结构的选材,介绍了这种结构体系的特点和设计特点,以供设计参考。 相似文献
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为明确钢管混凝土柱-组合梁单边螺栓连接框架的耐火性能,采用有限元方法分析了ISO 834 标准升温曲线火灾作用下,圆形钢管混凝土柱-组合梁单边螺栓连接框架的温度场和耐火极限。研究结果表明:提出的简化的HB 螺栓模型可以有效地对圆形钢管混凝土-组合梁框架的耐火性能进行分析。钢管混凝土柱横截面混凝土的网格划分方法对于钢管混凝土柱-组合梁框架的耐火极限影响较小。当节点连接可靠时,钢管混凝土柱-组合梁框架达到耐火极限时的破坏模式主要有柱破坏模式和组合梁破坏模式。 相似文献
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A floor slab constructed in conventional moment-resisting frames (MRFs) limits opening of gaps at the beam-to-column interfaces, causing losses of self-centering capability and preventing its use in steel post-tensioned (PT) moment frames. This work presents two novel slab schemes to reduce the restraints on the seismic responses of a PT frame. The first scheme uses a slab in typical MRFs with a modification so that near the connection, the metal deck is discontinuous and the longitudinal bar in the deck is debonded from concrete to minimize slab restraints. The second scheme uses truss elements to connect the slab and beams in only one bay (rigid bay) of the PT frame for transferring inertial forces from the floor to the frame. The sliding device is provided at one end of floor beams transverse to the PT frame, where sliding of the slab is expected. The cyclic behaviors of the bare connection and the connection with the first slab scheme are also evaluated by testing four connections. Additionally, how the rigid bay affects the cyclic behavior of the frame, distribution of column shear, beam axial force variation, and gap opening response near the beam-to-column interface is evaluated by conducting frame subassembly tests. The test results demonstrate that (1) the PT frame with any of two slab schemes develops large deformation capacities with small residual deformations, and (2) the column shear and beam axial force can be estimated based on the proposed method. 相似文献
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Alireza Bagheri Sabbagh Mihail PetkovskiKypros Pilakoutas Rasoul Mirghaderi 《Journal of Constructional Steel Research》2011,67(4):634-646
This paper presents an investigation on the potential use of cold-formed steel sections (CFS sections) in moment-resisting frames (MRFs) for seismic applications. The main limitation of CFS sections is the low out-of-plane stiffness of their thin-walled elements which leads to low ductility. The main components of MRFs are beams, beam-column connections and columns. In earthquake resistant MRFs, the beams are designed to provide considerable ductility, whereas the other elements are mainly limited to their elastic range. The performance of a new shape of CFS beam with curved flange is examined analytically and compared with that of conventional shapes. The proposed beam-column connections include through plates which potentially limit the out-of-plane action of the forces transferred through the connections. The behaviour of both individual CFS beam sections and CFS beam-column connections is studied by means of finite element analysis (FEA). The results of the analyses show that the new beam cross sections and connections exhibit a good ductile behaviour, something which cannot be achieved by conventional cold-formed frame elements. 相似文献
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Mohammad T. Nikoukalam S.R. Mirghaderi Kiarash M. Dolatshahi 《The Structural Design of Tall and Special Buildings》2017,26(3)
Slotted bolted connections (SBCs) have been developed and used as an axial friction damper in braced frames since 1980s. To employ the benefits of SBCs in moment resisting frames (MRFs), rotational slotted bolted connections have been developed more recently with limited application in members that flexural behavior is dominated to shear. In this paper, shear slotted bolted connection (SSBC) is introduced as a new type of friction dampers to employ the benefits of SBCs in lateral load resisting systems with predominant shear behavior members that dissipate energy by traditional yielding mechanisms. The SSBC is a modified bolted connection that dissipates energy through friction in which friction is activated by shear force. The applications of the proposed system as a shear link in link beams of eccentrically braced frames (EBFs), in the beams of MRFs, and coupling beams of coupled concrete shear walls are introduced. To show the efficiency of SSBC, an existing EBF with tubular link beam is equipped with SSBC, and its behavior is studied via models created in general purpose finite element program ABAQUS (SIMULIA, The Dassault Systèmes, Realistic Simulation, RI, USA) verified thoroughly against relevant test results. Also, three MRFs with different beam lengths are modified using SSBC, and their monotonic and cyclic behavior are investigated using validated finite element models. The results show that, as expected, SSBC is capable of working as a mechanical shear fuse dissipating energy effectively in both MRFs and EBFs without any material yielding. 相似文献
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通过10个不同连接构造的足尺钢梁柱刚性连接节点的试验,研究了标准栓焊连接节点、标准全焊连接节点、梁翼缘加强型节点、梁翼缘局部削弱型节点以及梁贯通型节点在梁端往复荷载作用下的破坏过程、破坏形态、承载力和塑性变形能力等抗震性能。试验结果表明,梁翼缘局部切割削弱和梁翼缘加盖板节点的梁的极限塑性转角大于0.03,梁贯通型节点、梁下翼缘加腋节点和梁翼缘打孔节点的梁的极限塑性转角大于0.02,其余类型节点的都小于0.02。对实测的梁翼缘和腹板的应力分布的分析表明,梁根部翼缘处于三向应力状态,是其脆性断裂破坏的原因之一。建议钢框架梁柱连接优先采用梁翼缘加梯形盖板节点和梁下翼缘加腋节点。 相似文献
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冷弯轻钢骨架构件国内外的发展现状分析 总被引:2,自引:0,他引:2
叙述了冷弯薄壁轻钢构件的结构特性 ,介绍了国外冷弯薄壁轻钢构件的发展现状 ,提出了现阶段发展我国冷弯薄壁轻钢构件及住宅产业的对策与思考 相似文献