Cyclic Flexural Testing of Concentrically Braced Frame Beam-Column Connections
Cyclic Flexural Testing of Concentrically Braced Frame Beam-Column Connections
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DOI：
10.1061/(asce)st.1943-541x.0000326
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发表时间：
2011-07-01
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影响因子：
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通讯作者：
Fahnestock, Larry A.
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文献类型：
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作者：
Stoakes, Christopher D.;Fahnestock, Larry A.
本研究在评估中心支撑框架的预留抗侧力能力的基础上，研究了中心支撑框架梁柱节点的循环受弯性能。通过足尺试验研究了8个带节点板的梁柱节点，采用双角钢和端板细节，以确定其抗弯强度、刚度和延性。本文研究了端板厚度、角厚度、螺栓配置、焊缝类型和尺寸、辅助底座角度等连接参数对连接效果的影响。使用归一化的矩与故事漂移数据来量化全局连接行为和性能。与基线双角度细节相比，所有连接变化都增加了强度和刚度。端板的变化导致强度的较大增加，但漂移能力受到螺栓断裂的限制。双角变化使强度增加的幅度较小，但强度损失发生的比较缓慢，并维持了较大的漂移。双角连接配置与补充座角显示，以提供最佳的强度和变形能力的平衡。DOI：10.1061/(ASCE)ST.1943-541X.0000326。(C)2011年美国土木工程师学会。
This research investigates the cyclic flexural behavior and performance of concentrically braced frame beam-column connections in the context of evaluating the reserve lateral load-resisting capacity in concentrically braced frames. Eight beam-column connections with gusset plates, employing double angle and end plate details, were studied using full-scale experiments to determine their flexural strength, stiffness, and ductility. In this paper, the effects of connection parameters, such as end plate thickness, angle thickness, bolt configuration, weld type and size, and supplementary seat angle, are evaluated. The global connection behavior and performance are quantified using normalized moment versus story drift data. In comparison to a baseline double angle detail, all connection variations increased the strength and stiffness. The end plate variations resulted in larger increases in strength, but drift capacity was limited by bolt fracture. The double angle variations increased the strength by smaller margins, but strength loss occurred more gradually, and larger drifts were sustained. The double angle connection configuration with a supplemental seat angle is shown to provide the best balance of strength and deformation capacity. DOI: 10.1061/(ASCE)ST.1943-541X.0000326. (C) 2011 American Society of Civil Engineers.