配置500MPa縱筋帶錨固板搭接方案的框架頂層端節(jié)點抗震性能試驗研究
王曉鋒1，朱愛萍1，傅劍平2，薛峰2，陳堃3，彭輝4
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(1 中國建筑科學研究院，北京 100013； 2 重慶大學土木工程學院，重慶 400045；3 福建省建筑科學研究院，福州 350025；4 長沙有色冶金設計研究院，長沙 410011)［摘要］進行了8個鋼筋混凝土框架頂層端節(jié)點試件的低周反復加載試驗。重點研究了梁、柱配置500MPa縱筋的框架頂層端節(jié)點，當梁、柱負彎矩鋼筋采用帶錨固板的不同搭接方案時的抗震性能。試驗結果表明：采用帶錨固板鋼筋梁內搭接方案試件的抗震性能與采用規(guī)范GB50010—2002規(guī)定的梁內搭接方案試件的抗震性能基本相當，而采用帶錨固板柱內搭接方案試件的抗震性能相對較差；與梁正彎矩鋼筋采用90°彎折錨固的試件相比，在梁正彎矩鋼筋中使用錨固板錨固的試件，其梁筋的滑移量相對要??；試驗所用錨固板方案的錨固性能可以滿足試件抗震性能的要求。最后給出了帶錨固板負彎矩鋼筋梁內搭接方案以及使用錨固板錨固的設計建議。［關鍵詞］框架頂層端節(jié)點；500MPa鋼筋；負彎矩鋼筋搭接；錨固板中圖分類號：TU375.4, TU973+.31文獻標識碼：A文章編號：1002-848X(2011)08-0001-07Experimental study on seismic behavior of knee joints of RC frame using 500MPa reinforcements with anchor plateWang 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*十一五國家863課題（2007AA03Z550），十一五國家科技支撐課題（2008BAE61B04）。作者簡介：王曉鋒，高級工程師，Email：wxf77@139.com。參考文獻［1］GB50010—2002 混凝土結構設計規(guī)范［S］. 北京: 中國建筑工業(yè)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］中國建筑科學研究院建筑結構研究所, 天津大學建筑工程學院. 帶錨固板鋼筋機械錨固性能研究［R］. 天津：天津大學, 2006.［6］陳堃. 配置500MPa縱筋采用帶錨固板梁內搭接方案的框架頂層端節(jié)點抗震性能研究［D］. 重慶：重慶大學，2009.［7］彭輝. 配置500MPa縱筋采用帶錨固板柱內搭接方案的框架頂層端節(jié)點抗震性能研究［D］. 重慶：重慶大學，2009.［8］中國建筑科學研究院建筑結構研究所, 重慶大學土木工程學院. 配置500MPa級縱筋的混凝土框架結構非線性動力反應分析［R］. 重慶：重慶大學, 2010.［9］馮長征. 配有500MPa級鋼筋的框架頂層端節(jié)點抗震性能試驗研究［D］. 重慶：重慶大學，2007.
