(1 中国建筑科学研究院，北京 100013； 2 重庆大学土木工程学院，重庆 400045；3 福建省建筑科学研究院，福州 350025；4 长沙有色冶金设计研究院，长沙 410011)

［摘要］进行了8个钢筋混凝土框架顶层端节点试件的低周反复加载试验。重点研究了梁、柱配置500MPa纵筋的框架顶层端节点，当梁、柱负弯矩钢筋采用带锚固板的不同搭接方案时的抗震性能。试验结果表明：采用带锚固板钢筋梁内搭接方案试件的抗震性能与采用规范GB50010—2002规定的梁内搭接方案试件的抗震性能基本相当，而采用带锚固板柱内搭接方案试件的抗震性能相对较差；与梁正弯矩钢筋采用90°弯折锚固的试件相比，在梁正弯矩钢筋中使用锚固板锚固的试件，其梁筋的滑移量相对要小；试验所用锚固板方案的锚固性能可以满足试件抗震性能的要求。最后给出了带锚固板负弯矩钢筋梁内搭接方案以及使用锚固板锚固的设计建议。

［关键词］框架顶层端节点；500MPa钢筋；负弯矩钢筋搭接；锚固板

中图分类号：TU375.4, TU973+.31文献标识码：A文章编号：1002-848X(2011)08-0001-07

Experimental study on seismic behavior of knee joints of RC frame using 500MPa reinforcements with anchor plate

Wang Xiaofeng¹, Zhu Aiping¹，Fu Jianping²，Xue Feng²，Chen Kun³，Peng Hui⁴(1 China Academy of Building Research, Beijing 100013, China; 2 College of Civil Engineering，Chongqing University, Chongqing 400045, China; 3 Fujian Academy of Building Research, Fuzhou 350025, China; 4 Changsha Engineering and Research Institute of Nonferrous Metallurgy, Changsha 410011, China)

Abstract:Cyclic loading tests of eight knee joint specimens of reinforced concrete frame were conducted. Studies were especially focused on the seismic behaviors of knee joints with 500MPa longitudinal reinforcement, in which different lapping schemes of negative reinforcements in column and beam with anchor end plates were applied. The test results show that the seismic behaviors of the specimens using lapping inside the beam with anchor end plate scheme are equivalent to those of specimens using lapping inside the beam scheme specified by-code GB50010—2002, and the seismic behaviors of specimens using lapping inside the column with anchor end plate scheme are relatively poor. It is also found that compared with the slippage of the beam positive reinforcement in specimens with 90-degree-bending-bar anchoring scheme, the slippage of the beam positive reinforcement in specimens using anchor end plate scheme is smaller. It can be concluded that the anchoring behavior of anchor end plates applied in the tests can satisfy the requirements of seismic performance of this kind of specimens. Finally, design recommendations were put forward for the lapping inside the beam scheme of negative reinforcements with anchor end plates, and for the reinforcement anchoring with end plates.

Keywords:knee joints in reinforced concrete frames; 500MPa reinforcement; negative reinforcement lapping; anchor plate

*十一五国家863课题（2007AA03Z550），十一五国家科技支撑课题（2008BAE61B04）。

作者简介：王晓锋，高级工程师，Email：wxf77@139.com。

参考文献

［1］GB50010—2002 混凝土结构设计规范［S］. 北京: 中国建筑工业出版社，2002.

［2］MEGGET L M. The seismic design and performance of reinforced concrete beam-column knee joints in buildings［J］. Earthquake Spectra, 2003, 19(4): 863-895.

［3］WALLACE J W, MCCONNELL S W, GUPTA P, et al. Use of headed reinforcement in beam-column joints subjected to earthquake loads［J］. ACI Structural Journal, 1998, 95(5): 590-606.

［4］LEE HUNGJEN, YU SIYING. Cyclic response of exterior beam-column joints with different anchorage methods［J］. ACI Structural Journal, 2009, 106(3): 329-339.

［5］中国建筑科学研究院建筑结构研究所, 天津大学建筑工程学院. 带锚固板钢筋机械锚固性能研究［R］. 天津：天津大学, 2006.

［6］陈堃. 配置500MPa纵筋采用带锚固板梁内搭接方案的框架顶层端节点抗震性能研究［D］. 重庆：重庆大学，2009.

［7］彭辉. 配置500MPa纵筋采用带锚固板柱内搭接方案的框架顶层端节点抗震性能研究［D］. 重庆：重庆大学，2009.

［8］中国建筑科学研究院建筑结构研究所, 重庆大学土木工程学院. 配置500MPa级纵筋的混凝土框架结构非线性动力反应分析［R］. 重庆：重庆大学, 2010.

［9］冯长征. 配有500MPa级钢筋的框架顶层端节点抗震性能试验研究［D］. 重庆：重庆大学，2007.