预应力混凝土空间框架节点二维拟静力试验研究
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摘要
采用拟静力试验方法对预应力混凝土和普通钢筋混凝土空间框架内节点进行了不同轴压比下单、双向循环加载的试验研究,得到不同加载方式下试件的滞回曲线。分析了各个试件的破坏形式、承载力、刚度、延性及耗能能力,通过比较和对滞回曲线的分析得出:双向水平荷载作用对构件耦合作用明显,构件存在扭转效应,构件的强度退化和刚度退化比单向荷载作用严重,节点的耗能能力降低。
Quasi-static experiments of prestressed concrete spatial frame joints and RC spatial frame joint are carried out under different axial compressions and uniaxial/biaxial cyclic lateral loading.The relationship between force and displacement is obtained with different loading approaches.Through the analyses of failure process,carrying capacity,stiffness,ductility and dissipating energy,it can be concluded that the coupling effect is obvious under biaxial lateral load,the torsional phenomenon exists in specimens,the degradations of strength and stiffness are more serious and the ability of dissipating energy is reduced.
Quasi-static experiments of prestressed concrete spatial frame joints and RC spatial frame joint are carried out under different axial compressions and uniaxial/biaxial cyclic lateral loading.The relationship between force and displacement is obtained with different loading approaches.Through the analyses of failure process,carrying capacity,stiffness,ductility and dissipating energy,it can be concluded that the coupling effect is obvious under biaxial lateral load,the torsional phenomenon exists in specimens,the degradations of strength and stiffness are more serious and the ability of dissipating energy is reduced.
引文
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[2]Sadjadi R,Kianoush MR,Talebi S.Seismic performance of reinforced concrete moment resisting frames[J].Engineering Structures,2007,29:2365-2380.
[3]Stefan Parche.Afibre model to simulate the cross-sectional behaviour of reinforced concrete columns under multi-directional earthquake loading[J].Computers and Structures,2000,77:403-411.
[4]Adrain M.Chandler,Nelson TK Lam.Performance-based design in earthquake engineering:a multidisciplinary review[J].Engineering Struc-tures,2001,23:1525-1543.
[5]李宏男,王强,李兵.钢筋混凝土框架柱多维恢复力特性的试验研究[J].东南大学学报,2002,32(5):728-732.
[6]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989:9-22.
[7]傅剑平.钢筋混凝土框架节点抗震[D].重庆:重庆建筑大学,2003.
[8]邱法维.结构拟动力、拟静力及远程网络化实验方法研究报告[R].北京:清华大学土木系,2005.
[9]贾金青,姜睿,徐世烺,等.超高强混凝土短柱的抗震性能研究[J].地震工程与工程振动,2006,26(6):120-126.
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