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《地震工程与工程振动》2017,(6)
为研究半刚性框架与钢板剪力墙结构内嵌墙板间的相互作用性能,完成了一榀1∶3比例单跨3层半刚性框架钢板剪力墙结构低周反复荷载试验研究。获得了结构的抗震性能和破坏模式,探究了框架梁、柱、墙板及梁柱节点的局部力学性能,分析了结构的破坏顺序和构件间的传力机理。研究结果表明:该结构具有良好的塑性变形能力和抗震性能,半刚性框架和墙板协同工作良好,结构安全储备较高。内嵌墙板的设置缓解了节点区自身的延性要求,框架承担95%以上的倾覆弯矩,水平荷载由双重抗侧力体系承担,内嵌墙板作为主要抗侧力构件承担约75%剪力。试件整体面内呈弯曲破坏,但是后期钢框架柱面外弯扭较大。通过有限元分析,研究了柱柔度系数、钢板高厚比和梁柱连接特性对钢板剪力墙结构性能的影响。框架梁柱连接刚度对结构体系承载能力的影响与柱的刚度和内嵌墙板的厚度有关。这种影响随着柱刚度增加和内嵌墙板厚度减小而增大。柱的柔度系数为2.5时,柱整体无明显的内凹变形,此时梁柱节点铰接连接更改为刚性连接时,试件承载能力增加小于10%。 相似文献
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钢框架带悬臂梁拼接节点的抗水平地表变形试验研究 总被引：1，自引：0，他引：1
以单层单跨带悬臂梁段拼接钢框架为研究对象,通过地表变形的物理相似模拟试验,研究了钢框架带悬臂梁段拼接节点在地表水平变形作用下的附加应力和变形规律。主要研究在水平拉伸和水平压缩作用下,拼接节点处腹板拼接板和上下翼缘拼接板内产生的附加内力及变形曲线,分析了上下翼缘拼接板和腹板拼接板中间位置点的变形值随着试验加载值的增加而变化的原因。研究结果表明：地表水平拉伸作用最为不利;拼接节点虽会产生附加变形,但在很大程度上仍处于弹性阶段,卸栽后可以恢复,表现出良好的抗变形性能。最后给出建议：在地表变形地区新建或加固改造钢结构建构筑物时,采用钢框架带悬臂梁段高强螺栓拼接连接,可以很好地吸收变形能。 相似文献
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利用ABAQUS有限元软件建立不同梁柱节点连接刚度的平面钢框架模型,采用SPRING2单元模拟梁柱连接,以不同弯矩—转角曲线作为节点约束条件,并通过添加位移约束方程实现多点位移控制加载。通过与两层两跨半刚性钢框架的实验结果进行模型验证,设定不同节点刚度影响系数α的值,建立一组不同节点刚度的六层两跨钢框架模型,对其进行了单向加载及循环加载,对比分析了承载力、侧向刚度、延性、耗能能力、刚度退化等特性。结果表明：当α介于1/15~1/20时钢框架承载力及侧向刚度较高,且具有良好的延性及耗能能力。可为实际工程中节点设计提供参考。 相似文献
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新型方钢管混凝土框架节点抗震性能试验研究 总被引：2，自引：0，他引：2
本文介绍了新型方钢管混凝土柱与钢梁节点在低周反复荷载作用下的试验结果,研究了内填混凝土、加劲肋长度和梁柱相对尺寸等对节点抗震性能的影响,并提出了有关的设计建议。 相似文献
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水平地震作用下多层钢框架-混凝土筒结构整体性能研究 总被引：1，自引：1，他引：0
利用ALGOR有限元软件,分析了不同节点连接型式的多层钢框架-混凝土筒结构体系在水平地震作用下的整体受力性能。研究表明：不同节点连接方式对结构体系的动力特性影响较小;最大水平位移和层间位移均能满足相应的要求;大部分水平地震剪力由混凝土筒承担;当梁柱采用半刚性连接时,钢柱分配到的水平地震剪力小于梁柱刚接时,因此能更好发挥混凝土筒的抗侧力性能。这些研究结果为多层钢框架-混凝土筒的结构设计提供一定的理论依据。 相似文献
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《世界地震工程》2017,(1)
为研究外方内圆复式钢管混凝土柱-钢梁节点的累积耗能性能,对6个组合节点试件和1个方钢管混凝土柱-钢梁节点对比试件进行了低周往复荷载作用下的试验研究和参数分析,探讨了节点的各项耗能指标及影响参数。结果表明:此类组合节点试件具有良好的滞回耗能能力,其中锚固腹板加肋和竖向肋板外伸长度120mm的节点试件累积耗能能力较好,且累积损伤对节点滞回耗能影响不明显;其余节点试件的梁端位移角达到1/23时,试件开始有累积损伤,滞回耗能下降幅度不超过10%,累积损伤对其影响不严重;复式钢管混凝土柱-钢梁节点的累积耗能各项指标均优于方钢管混凝土柱-钢梁节点;节点试件的累积耗能随着梁柱弯矩比的增大而有所提高,随竖向肋板外伸长度和梁柱线刚度比的增大也有所提高,但有一定限值。 相似文献
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在已有理论和试验研究的基础上，对复式钢管混凝土外肋环板节点的抗剪受力性能进行分析。建立了节点核心区的抗剪受力模型，将节点域抗剪贡献分为三部分:节点域内外钢管腹板的抗剪贡献、节点主要连接件竖向肋板与锚固腹板的抗剪贡献以及节点域混凝土的抗剪贡献，推导了复式钢管混凝土柱节点屈服抗剪承载力和极限抗剪承载力的计算公式，为复式钢管混凝土柱节点的工程设计提供承载力计算方法。理论得到的节点屈服剪力和极限剪力值与试验结果进行了对比，并提出抗剪能力储备系数这一新指标反映节点的抗剪切破坏能力，量化地解释了节点发生梁铰破坏后抗剪能力的安全储备。得出此类新型节点在破坏时抗剪储备能力充足，可保证节点达到良好延性的破坏模式，说明节点设计符合强剪弱弯的抗震设计原则。 相似文献
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《地震工程与工程振动》2021,41(3)
提出一种新型全装配式混凝土梁柱-钢支撑组合节点,是实现装配式混凝土框架-Y形偏心钢支撑结构预期抗震性能的关键问题之一。采用校正的有限元方法对5种考虑不同因素的腹板开洞型抗剪连接键进行研究,以得到其受剪承载力和损伤模式。随后对基于合理分析模型、材料参数、单元接触、边界条件与加载方式等分析方法的新型节点研究表明,在不同地震水平往复力作用下,组合节点的滞回曲线表现为弹性,即未进入塑性和耗能。另外,在达到最大负向、正向位移时,抗剪连接键、对穿螺杆和支撑连接板仍处于弹性状态,混凝土损伤值和损伤区域均较小,即该新型组合节点具有高承载力、可全装配、功能可恢复等特点,可满足相应结构对该组合节点的要求。 相似文献
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本文对采用顶底角钢连接的半刚性钢梁柱连接节点进行了精细的三维非线性有限元分析,在与实验数据对比的基础上,对影响该连接性能的主要参数如角钢厚度、柱翼缘连接螺栓与梁翼缘间的距离等进行了分析,得到了其弯矩-转角曲线。 相似文献
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Ten full-scale steel beam-to-column moment connections used in moment-resisting frames （MRFs） were tested to study the failure process, failure mode, strength and plastic rotation capacity. The specimens include one traditional welded flange-bolted web connection, one traditional fully welded connection, four beam flange strengthened connections, three beam flange weakened connections, and one through-diaphragm connection. The test results show that the connections with flange cover plates or with partly cut beam flanges satisfy the beam plastic rotation demand for ductile MRFs. From the measured stress profiles along the beam flange and beam web depth, the mechanics of brittle fracture at the end of the beam is discussed. Design recommendations for steel beam-to-column moment connections are proposed. 相似文献
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传统抗弯钢框架的梁柱节点通常设计为刚性连接,这种刚性节点具有很大的抗弯刚度,然而节点延性不足,罕遇地震作用导致节点脆性断裂。研究学者提出了多种解决该问题的思路,例如半刚性连接节点、节点加强或削弱方法使塑性铰外移等。本文提出了一种简化的梁柱节点连接方式-铰接连接,改变梁柱节点的传力方式,在节点处设置隅撑提供框架的抗侧刚度,控制结构的失效模式。本文设计了三组抗弯钢框架和铰接隅撑钢框架,分别为3层、5层和8层结构,通过Pushover分析和非线性动力时程分析,对比二者之间的承载力、刚度、延性和层间侧移等抗震性能。研究结果表明:铰接隅撑钢框架具有和传统抗弯钢框架相似的抗侧刚度,且承载能力略高。罕遇地震作用下,铰接隅撑钢框架的层间侧移较小。传统抗弯钢框架失效模式为梁端出现塑性铰,而铰接隅撑钢框架的塑性区域转移至隅撑与梁连接部位。 相似文献
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低周反复荷载作用下矩形钢管混凝土柱与钢梁连接节点的受力性能 总被引：13，自引：3，他引：10
本文进行了2种矩形钢管混凝土柱与钢梁连接节点——翼缘全螺栓(BFP)连接节点与外加强环(WFP-BW)连接节点在柱端低周反复荷载作用下的抗震性能试验,分析比较了这2类节点与焊接翼缘板(WFP)连接节点在不同轴压比下的滞回性能、强度与刚度退化、延性比与耗能比、破坏机理与破坏特征,得出了一些有参考价值的结论。 相似文献
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Moment connections in an existing steel building located in Kaohsiung, Taiwan were rehabilitated to satisfy seismic requirements based on the 2005 AISC seismic provisions. Construction of the building was ceased in 1996 due to financial difficulties and was recommenced in 2007 with enhanced connection performance. Steel moment connections in the existing building were constructed by groove welding the beam flanges and bolting the beam web to the column. Four moment connections, two from the existing steel building, were cyclically tested. A non‐rehabilitated moment connection with bolted web‐welded flanges was tested as a benchmark. Three moment connections rehabilitated by welding full‐depth side plates between the column face and beam flange inner side were tested to validate the rehabilitation performance. Test results revealed that (1) the non‐rehabilitated existing moment connection made by in situ welding process prior to 1996 had similar deformation capacity as contemporary connection specimens made by laboratory welding process, (2) all rehabilitated moment connections exhibited excellent performance, exceeding a 4% drift without fractures of beam flange groove‐welded joints, and (3) presence of the full‐depth side plates effectively reduced beam flange tensile strain near the column face by almost half compared with the non‐rehabilitated moment connection. The connection specimens were also modeled using the non‐linear finite element computer program ABAQUS to further confirm the effectiveness of the side plate in transferring beam moments to the column and to investigate potential sources of connection failure. A design procedure was made based on experimental and analytical studies. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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通过柱端加载的低周反复荷载试验对8个内隔板三边焊接,而在未焊一边柱壁板上布置圆柱头栓钉的方钢管混凝土柱-H形钢梁节点进行了试验研究,研究了不同轴压比情况下节点的破坏模式、延性、耗能性能等。试验结果表明,破坏之前节点具有良好的滞回性能、延性及耗能能力,满足现行抗震规范的要求。该节点可以用于方钢管混凝土柱两侧弯矩相差较大时,弯矩较小一侧节点。提出了相关的设计建议。 相似文献
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A. Braconi O. S. Bursi G. Fabbrocino W. Salvatore F. Taucer R. Tremblay 《地震工程与结构动力学》2008,37(14):1635-1655
This paper presents the results of a multi‐level pseudo‐dynamic seismic test program that was performed to assess the performance of a full‐scale three‐bay, two‐storey steel–concrete composite moment‐resisting frame built with partially encased composite columns and partial‐strength beam‐to‐column joints. The system was designed to develop a ductile response in the joint components of beam‐to‐column joints including flexural yielding of beam end plates and shear yielding of the column web panel zone. The ground motion producing the damageability limit state interstorey drift caused minor damage while the ultimate limit state ground motion level entailed column web panel yielding, connection yielding and plastic hinging at the column base connections. The earthquake level chosen to approach the collapse limit state induced more damage and was accompanied by further column web panel yielding, connection yielding and inelastic phenomena at column base connections without local buckling. During the final quasi‐static cyclic test with stepwise increasing displacement–amplitudes up to an interstorey drift angle of 4.6%, the behaviour was ductile although cracking of beam‐to‐end‐plate welds was observed. Correlations with numerical simulations taking into account the inelastic cyclic response of beam‐to‐column and column base joints are also presented in the paper together. Inelastic static pushover and time history analysis procedures are used to estimate the structural behaviour and overstrength factors of the structural system under study. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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一般采用梁柱焊接节点钢框架结构在遭遇强烈地震地震作用下，结构倒塌破坏可能由于是耗能能力不足所导致。以某钢框架结构为算例，选取20条实际地震动记录，对结构进行易损性分析，对比不同损伤指标和不同梁端构造形式的钢框架结构抗震性能差异。研究显示:对梁柱焊接的普通钢框架结构，其倒塌破坏是由于结构耗能能力不足所导致的，评价结构抗震性能不仅需考虑结构变形能力，尚需同时考虑结构耗能能力；对于改进形式的钢框架结构，结构耗能能力得到显著提高，使得位移首超破坏先于累积损伤破坏，此时基于变形的评价结果更加可靠。 相似文献
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This paper presents the results of a probabilistic evaluation of the seismic performance of 3D steel moment‐frame structures. Two types of framing system are considered: one‐way frames typical of construction in the United States and two‐way frames typical of construction in Japan. For each framing system, four types of beam–column connections are considered: pre‐Northridge welded‐flange bolted‐web, post‐Northridge welded‐flange welded‐web, reduced‐beam‐section, and bolted‐flange‐plate connections. A suite of earthquake ground motions is used to compute the annual probability of exceedence (APE) for a series of drift demand levels and for member plastic‐rotation capacity. Results are compared for the different framing systems and connection details. It is found that the two‐way frames, which have a larger initial stiffness and strength than the one‐way frames for the same beam and column volumes, have a smaller APE for small drift demands for which members exhibit no or minimal yielding, but have a larger APE for large drift demands for which members exhibit large plastic rotations. However, the one‐way frames, which typically comprise a few seismic frames with large‐sized members that have relatively small rotation capacities, may have a larger APE for member failure. The probabilistic approach presented in this study may be used to determine the most appropriate frame configuration to meet an owner's performance objectives. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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Seismic design and experiment of single and coupled corner gusset connections in a full‐scale two‐story buckling‐restrained braced frame 
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下载免费PDF全文 Pao‐Chun Lin Keh‐Chyuan Tsai An‐Chien Wu Ming‐Chieh Chuang Chao‐Hsien Li Kung‐Juin Wang 《地震工程与结构动力学》2015,44(13):2177-2198
A gusset plate is subjected to forces induced from a buckling‐restrained brace (BRB) and frame action. In this study, a performance‐based design method of the gusset connections incorporating a BRB and frame actions is investigated. The force demands resulting from the BRB axial force are computed from the generalized uniform force method. The force demands induced from the frame action effects primarily result from beam shear. A conservative method, which considers the beam axial force effect and the thereafter reduced beam flexural capacity possibly developed at the gusset tips, is adopted in estimating the maximum beam shear. An improved equivalent strut model is used to represent the gusset plate subjected to the frame action effect. The total force demands of the gusset connection are combined from the BRB force and the frame actions. For design purposes, the stress distributions on the gusset interfaces are linearized. The maximum von Mises stress combining the normal and shear stresses is considered as the demand for the gusset plate design. In order to verify the effectiveness of the proposed design method, experiments on a two‐story full‐scale buckling‐restrained braced frame (BRBF) were performed. The chevron and single diagonal brace configurations were arranged in the second and the first stories, respectively. Two different corner gusset connection configurations including one single corner gusset and one coupled corner gusset connection, where two braces in adjacent stories joined at the same beam‐to‐column joint, were tested. The BRBF specimen was subjected to cyclically increasing lateral displacements with a maximum frame drift of 0.04 rad. The maximum story drifts reached 0.035 and 0.061 rad. in the first and the second stories, respectively. At the end of the tests, no fractures were observed on any of the gusset interfaces. Along the gusset interfaces, the normal and shear stress distributions computed from the proposed design procedures and the FEM analysis correlated well with the experimental results. This paper concludes with the procedure and recommendations for the performance‐based design of gusset connections. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献