\r戎 贤^{1, 2}，张祥幸¹，杜颜胜\r³\r
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AuthorsHTML:\r戎 贤^{1, 2}，张祥幸¹，杜颜胜\r³\r
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AuthorsListE:\rRong Xian^{1, 2}，Zhang Xiangxing¹，Du Yansheng\r³\r
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AuthorsHTMLE:\rRong Xian^{1, 2}，Zhang Xiangxing¹，Du Yansheng\r³\r
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Unit:\r\r1. 河北工业大学土木与交通学院，天津 300401；\r
\r\r2. 河北省土木工程技术研究中心，天津 300401；
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\r3. 天津大学建筑工程学院，天津 300072\r
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Unit_EngLish:\r1. School of Civil and Transportation Engineering，Hebei University of Technology，Tianjin 300401，China；
2. Civil Engineering Technology Research Center of Hebei Province，Tianjin 300401，China；
3. School of Civil Engineering，Tianjin University，Tianjin 300072，China\r
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Abstract_Chinese:\r\r为提高方钢管混凝土柱\r-H\r型钢梁节点连续倒塌工况下的承载力和转动能力，提出了一种\rH\r型钢梁下栓接贯通隔板上焊接外环板的新型节点形式，进行了试验研究，分析了腹板连接板处开长圆螺栓孔对节点力学性能的影响\r．\r结果表明：与以往节点形式相比，该种新型节点形式具有更高的承载力和更好的转动能力；钢梁的受力符合梁抗弯机制转悬索机制的一般规律；腹板连接板处开设长圆螺栓孔并未削弱连接，反而提高了节点的转动能力和竖向抗力，梁抗弯机制失效后进入悬链线阶段，是钢框架体系中用于抗连续倒塌设计的一种较为理想的节点形式\r．\r同时通过对比规范发现，该种新型节点形式承载力符合相关设计要求，此规范可用于该节点的设计和结构屈服预测\r．\r\r
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Abstract_English:\r\rTo improve the bearing and rotational capacities of a square concrete-filled steel tubular column with H-beam joints under progressive collapse conditions\r，\rwe propose a beam-column connection using a steel beam with an H-shaped lower flange and perforation plate bolting with the upper flange welded to outer ring plates\r．\rThis joint form was statically teste\rd by electric servo actuator\r．\rThe influence of an exposed long\r，\rround bolt hole on the mechanic-cal properties of the joint was also analyzed\r．\rResults showed that the proposed connection had higher bearing and rotational capacities compared to previous connection forms\r；\rfurther\r，\rthe force component of the steel beam conformed to the general beam bending conditions\r．\rThe long\r，\rround bolt holes set at the connecting web plate did not weaken the connection\r；\ron the contrary\r，\rthey improved rotational ability and vertical resistance of the joint\r．\rThe catenary stage appeared after the beam-bending resistance mechanism failed\r．\rFurthermore\r，\rwe found that the bearing capacity of the connection met the relevant design requirements in accordance with the standard specification\r．\rHence\r，\rthis specification can be used for the design and structural yield point prediction of the connection\r．\rThe proposed connection form was found to be ideal for resisting progressive collapse conditions in the steel frame system\r．\r\r
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Keyword_Chinese:钢节点；连续性倒塌；静力试验；贯通隔板；悬索机制\r

Keywords_English:steel joint；progressive collapse；static test；perforation plate；catenary mechanism\r


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