碳纤维布加固透榫木构架抗震性能试验
|
摘要
榫卯节点在地震中极易损坏,加固榫卯节点成为加固木结构建筑的关键。通过对3榀按照《中国古建筑木作营造技术》制作的透榫木构架,分别采用3种不同碳纤维(CFRP)布加固方案加固的构架进行水平低周反复加载试验,得到未加固构架和3种不同加固构架的破坏模式、拔榫量、P-Δ滞回曲线、骨架曲线、刚度退化及耗能能力等。通过试验研究表明:经CFRP布加固后,3种不同加固构架的CFRP布破坏程度不一样;拔榫值在加载后期较未加固构架明显减小;加固构架的承载力与刚度提高,其中双层分离式CFRP布加固提高的最多;节点的耗能能力稍有降低。3种CFRP布加固方法均取得了较好的加固效果,双层分离式加固效果最优。
The strengthen of mortise-tenon joints was the key to strengthen wood structure because they were extremely easy to be destroyed under earthquakes.Low-cyclic reversed loading tests were conducted on six wood frame models,including three non-reinforced models made with Chinese ancient wood construction technology,and three models strengthened with carbon fiber reinforced polymer( CFRP) by different construction methods.Their behaviors,such as failure characteristics,node pull tenon size,P-Δ hysteretic curves,skeleton curves,energy dissipation capacity, and degradation of stiffness,were analyzed.Experimental results indicated that each of the three different CFRP reinforced models appeared different failure degrees.The node pull tenon values of the models strengthened with CFRP reducd obviously than the normal structure during the late loading period; and the bearing capacity and the stiffness of reinforced models improved,in which double CFRP reinforced models improved obviously.While the energy dissipation capacity had a little decrease; All these three strengthening methods,especially the method for double CFRP strengthening method,were obviously effective.
The strengthen of mortise-tenon joints was the key to strengthen wood structure because they were extremely easy to be destroyed under earthquakes.Low-cyclic reversed loading tests were conducted on six wood frame models,including three non-reinforced models made with Chinese ancient wood construction technology,and three models strengthened with carbon fiber reinforced polymer( CFRP) by different construction methods.Their behaviors,such as failure characteristics,node pull tenon size,P-Δ hysteretic curves,skeleton curves,energy dissipation capacity, and degradation of stiffness,were analyzed.Experimental results indicated that each of the three different CFRP reinforced models appeared different failure degrees.The node pull tenon values of the models strengthened with CFRP reducd obviously than the normal structure during the late loading period; and the bearing capacity and the stiffness of reinforced models improved,in which double CFRP reinforced models improved obviously.While the energy dissipation capacity had a little decrease; All these three strengthening methods,especially the method for double CFRP strengthening method,were obviously effective.
引文
[1]罗哲文.中国古代建筑[M].上海:上海古籍出版社,2001.
[2]杨亚弟,杜景林,李桂荣.古建筑震害特性分析[J].世界地震工程,2000,16(3):12-16.
[3]陆伟东,邓大利.木结构榫卯节点抗震性能及其加固试验研究[J].地震工程与工程振动,2012,32(3):109-116
[4]谢启芳.中国古代木结构建筑榫卯加固抗震试验研究[D].西安:西安建筑科技大学,2007.
[5]徐明刚,邱洪兴.中国古代木结构建筑榫卯节点抗震试验研究[J].建筑结构学报,2010(增刊):345-349.
[6]周乾,闫维明,张博.CFRP布加固古建筑木构架抗震试验[J].山东建筑大学学报,2011,26(4):327-333.
[7]马炳坚.中国古建筑木作营造技术[M].北京:科学出版社,1991.
[8]梁思成.工程做法则例[M].北京:清华大学出版社,2006.
[2]杨亚弟,杜景林,李桂荣.古建筑震害特性分析[J].世界地震工程,2000,16(3):12-16.
[3]陆伟东,邓大利.木结构榫卯节点抗震性能及其加固试验研究[J].地震工程与工程振动,2012,32(3):109-116
[4]谢启芳.中国古代木结构建筑榫卯加固抗震试验研究[D].西安:西安建筑科技大学,2007.
[5]徐明刚,邱洪兴.中国古代木结构建筑榫卯节点抗震试验研究[J].建筑结构学报,2010(增刊):345-349.
[6]周乾,闫维明,张博.CFRP布加固古建筑木构架抗震试验[J].山东建筑大学学报,2011,26(4):327-333.
[7]马炳坚.中国古建筑木作营造技术[M].北京:科学出版社,1991.
[8]梁思成.工程做法则例[M].北京:清华大学出版社,2006.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心