- 摘 要
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(1 北京工業(yè)大學(xué)，北京市高層和大跨度預(yù)應(yīng)力鋼結(jié)構(gòu)工程技術(shù)研究中心， 北京 100124；2 中國建筑第八工程局有限公司， 上海 200135)
［摘要］研究了一種L形鋼管混凝土柱-H型鋼梁Z字形拼接節(jié)點(diǎn)的抗震性能，包括翼緣和腹板均拼接的節(jié)點(diǎn)和設(shè)置上、下部翼緣加勁肋替代腹板處拼接板的節(jié)點(diǎn)。通過對節(jié)點(diǎn)的擬靜力試驗(yàn)和研究，獲得了節(jié)點(diǎn)的滯回曲線、滑移荷載、屈服荷載、極限荷載、耗能能力、延性與剛度退化規(guī)律，分析腹板處拼接板和翼緣加勁肋對節(jié)點(diǎn)抗震性能的影響。研究結(jié)果表明：腹板處拼接板可以提高節(jié)點(diǎn)的屈服荷載和極限荷載。增加翼緣高強(qiáng)螺栓數(shù)量可以提高節(jié)點(diǎn)的滑移荷載，但會降低節(jié)點(diǎn)的延性性能。垂直加勁肋可以提高節(jié)點(diǎn)的屈服荷載、極限荷載和延性。對比有無上、下翼緣加勁肋的兩組節(jié)點(diǎn)可知，上、下翼緣加勁肋可以提高節(jié)點(diǎn)的承載能力，有效傳遞拼接區(qū)的剪力，可代替腹板連接，該節(jié)點(diǎn)具有良好的延性和塑性轉(zhuǎn)動(dòng)能力。
［關(guān)鍵詞］鋼結(jié)構(gòu)；梁柱連接；懸臂梁段；抗震性能；破壞模式
中圖分類號：TU391 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)23-0061-08
Seismic behavior of Z-shaped splicing joint between concrete-filled L-shaped steel tubular column and H-section beam
LIU Xuechun1, IM MYONG HAK1, CHEN Xuesen1, YU Shaole2, PAN Junjun2
(1 Beijing Engineering Research Centre of High-rise and Large-span Prestressed Steel Structures, Beijing Universty of Technology, Beijing 100124， China； 2 China Construction Eighth Engineering Division Co., Ltd., Shanghai 200135， China)
Abstract: The seismic performance of a Z-shaped splicing joint between concrete-filled L-shaped steel tubular column and H-section beam was studied, including joints with splicing flanges and webs, and joints with upper and lower flange stiffeners instead of splicing plates at the webs. Through the pseudo-static test and research on the joints, the hysteresis curve, slip load, yield load, peak load, energy consumption capacity, ductility and stiffness degradation law were obtained, and the effects of splicing plates and flange stiffeners at the web on the seismic performance of joint was analyzed. The research results show that the web splice plate can improve the yield load and peak load of the joint. Increasing the number of flange high-strength bolts can improve the joint′s slip load, but it will reduce the ductility performance. The vertical stiffener can increase the yield load, peak load and ductility of the joint. Comparing the two sets of joint with or without upper and lower flange stiffeners, it can be seen that the upper and lower flange stiffeners can improve the bearing capacity of the joint, effectively transmit the shear force in the splicing area, and can replace the web connection. The joints have good ductility and plastic rotation capacity.
Keywords:steel structure； beam-column connection； cantilever-beam； seismic performance； failure mode
*北京市科學(xué)技術(shù)委員會項(xiàng)目（z171100002217017）。
作者簡介：劉學(xué)春，博士，教授，博士生導(dǎo)師，Email：liuxuechun@bjut.edu.cn; 通信作者：陳學(xué)森，博士，助理研究員，Email：chenxuesen@bjut.edu.cn。
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