后张预应力加固砖墙抗震性能研究及工程应用
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摘要
提出采用后张预应力技术对砖混墙体进行抗震加固的新技术,并进行8片试验墙体在水平低周反复荷载下的试验研究.对比分析了未加固墙体与加固墙体的破坏形态和受力特点.试验结果表明,后张预应力加固砖砌体墙体可以显著提高墙体的延性和抗剪承载力,改善破坏形态.
A new seismic retrofitting technology of using post-tensioning tendons to retrofit brick wall structures was presented and eight brick walls retrofitted with post-tensioned tendons were tested under lateral low-cyclic reversed load.Mechanical behaviors and failure modes of the seismically retrofitted brick walls using post-tensioning were compared to the response of a non-retrofitted brick wall.It could be found that the ductility and the shear capacity of the brick wall retrofitted using post-tensioned tendons could be significantly improved,and the failure modes were also enhanced.
A new seismic retrofitting technology of using post-tensioning tendons to retrofit brick wall structures was presented and eight brick walls retrofitted with post-tensioned tendons were tested under lateral low-cyclic reversed load.Mechanical behaviors and failure modes of the seismically retrofitted brick walls using post-tensioning were compared to the response of a non-retrofitted brick wall.It could be found that the ductility and the shear capacity of the brick wall retrofitted using post-tensioned tendons could be significantly improved,and the failure modes were also enhanced.
引文
[1]刘航,杨学中.汶川大地震绵阳地区震害调查分析[C]//第五届全国预应力结构理论与工程应用学术会议论文集.昆明:[出版者不详],2008:463-467.
[2]Chuang S,Zhuge Y,McBean P C.Seismic retrofiting of unreinforced masonry walls by cable system[C]//Proceedings of the13th World Conference on Earthquake Engineering.Vancouver:[s.n.],2004.
[3]Najif I,Laursen P,Ingham J M.Out-of-plane testing of seismically retrofitted URM walls using posttensioning[C]//Pro-ceedings of The AEES Conference.Newcastle:[s.n.],2009.
[4]ElGawady M,Lestuzzi P,Badoux M.A review of conventional seismic retrofitting techniques for URM[C]//Proceedings of the13th International Brick and Block Masonry Conference.Amsterdam:[s.n.],2004.
[5]Mojsilovic N,Marti P.Load tests on post-tensioned masonry walls[J].TMS Journal,2000,18(1):65-70.
[6]刘航,高会宗,杨学中,等.后张体外预应力加固技术及其工程应用[J].建筑技术,2012,43(1):49-52.
[2]Chuang S,Zhuge Y,McBean P C.Seismic retrofiting of unreinforced masonry walls by cable system[C]//Proceedings of the13th World Conference on Earthquake Engineering.Vancouver:[s.n.],2004.
[3]Najif I,Laursen P,Ingham J M.Out-of-plane testing of seismically retrofitted URM walls using posttensioning[C]//Pro-ceedings of The AEES Conference.Newcastle:[s.n.],2009.
[4]ElGawady M,Lestuzzi P,Badoux M.A review of conventional seismic retrofitting techniques for URM[C]//Proceedings of the13th International Brick and Block Masonry Conference.Amsterdam:[s.n.],2004.
[5]Mojsilovic N,Marti P.Load tests on post-tensioned masonry walls[J].TMS Journal,2000,18(1):65-70.
[6]刘航,高会宗,杨学中,等.后张体外预应力加固技术及其工程应用[J].建筑技术,2012,43(1):49-52.
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