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法冠喆,王全鳳(華僑大學土木工程學院,泉州 362021)
[摘要]通過玄武巖纖維增強復合材料(BFRP)加固圓形截面木結構榫卯節(jié)點的水平低周反復荷載試驗,對加固后榫卯節(jié)點的抗震性能進行了研究,主要包括滯回曲線、骨架曲線、強度和剛度退化規(guī)律、變形等。試驗結果表明,BFRP加固榫卯節(jié)點的滯回曲線和未加固榫卯節(jié)點的滯回曲線圖形明顯不同,BFRP加固能夠有效提高榫卯節(jié)點的承載力和剛度。根據榫卯節(jié)點剛度和極限承載力提高的比例,提出了BFRP加固榫卯節(jié)點的加固設計經驗公式。
[關鍵詞]榫卯節(jié)點;BFRP;加固;低周反復荷載;木結構;抗震性能
中圖分類號:TU366.2文獻標識碼:A文章編號:1002-848X(2012)04-0152-05
Experimental study on seismic performance of mortise-tenon joints strengthened by BFRP
Fa Guanzhe, Wang Quanfeng(Institute of Civil Engineering,Huaqiao University, Quanzhou 362021, China)
Abstract:Low-cyclic reversed loading tests were conducted on mortise-tenon joints strengthened by basalt fiber reinforced polymer (BFRP). Seismic properties including. The failure characteristics, hysteretic curve and skeleton curve, degeneration of strength and stiffness, deformation, were studied. The results indicate that the hysteresis curve were markedly different after strengthened by BFRP, BFRP can improve the bearing capacity and stiffness. According to increasing ratio of stiffness and ultimate bearing capacity for mortise-tenon joints, the formulas for mortise-tenon joints reinforced by BFRP were presented.
Keywords:mortise-tenon joint; basalt fiber reinforced polymer; strengthened; low-cyclic reversed loading; timber structure; seismic performance ability
*澳門特別行政區(qū)科學技術發(fā)展基金課題(524/263/SAF/2008),泉州市科技計劃項目(2006G7)。
作者簡介:法冠喆,博士研究生,Email:faguanzhe@163.com。
參考文獻
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