设有圈梁与构造柱的砌体结构预应力筋抗震加固试验研究
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摘要
通过对设有圈梁与构造柱的砌体结构采用体外预应力筋加固和未加固模型进行双向拟动力试验,对墙体裂缝开展、结构耗能、结构损伤等指标进行对比分析,探讨体外预应力筋加固对砌体结构抗震能力的影响。试验结果表明:体外预应力筋产生的约束力对限制裂缝开展、防止圈梁与预制楼板的脱空效果明显;砌体结构在体外预应力筋加固后的总滞回耗能大于未加固体系,而损伤指标小于未加固体系,由此可见体外预应力筋加固提高了结构耗能能力,同时减小了结构在地震中的破坏程度。
By bi-directional pseudo-dynamic testing,the seismic performence of masonry structure with ring beams and constructional columns,which was strengthened by external prestressed bars,was studied.The main conclusions drawn from the testing were: pretressed bars have obviously limited the developing of the crack;the structure has a good recovery performance,and the cracks close again after the end of loading;it is helpful to prevent the floor from being away from the wall;strengthened structure plays a key role for energy dissipation and the structural damage is minor compareed with the structure without prestressed bar.So the prestressed bars greatly improve the seismic performance of masonry structure.
By bi-directional pseudo-dynamic testing,the seismic performence of masonry structure with ring beams and constructional columns,which was strengthened by external prestressed bars,was studied.The main conclusions drawn from the testing were: pretressed bars have obviously limited the developing of the crack;the structure has a good recovery performance,and the cracks close again after the end of loading;it is helpful to prevent the floor from being away from the wall;strengthened structure plays a key role for energy dissipation and the structural damage is minor compareed with the structure without prestressed bar.So the prestressed bars greatly improve the seismic performance of masonry structure.
引文
[1]信任,何成学.震后多层砌体结构的抗震鉴定与加固设计[J].地震工程与工程振动,2011,22(1):142-147.
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[4]宋彧,周乐伟,原国华.砌体结构预应力斜拉筋加固抗震性能试验研究[J].兰州理工大学学报,2008,34(5):118-121.
[5]孙伟民,郭樟根,胡晓明,等.预应力混凝土小型空心砌块带窗洞砌体抗震性能试验[J].南京工业大学学报,2002,9(5):7-11.
[6]林锦滔.两层砌体结构双向拟动力试验及抗震性能评价[D].福州:福州大学,2010.
[2]林玮,李巨文.多层砌体房屋抗震加固方法述评[J].地震工程与工程振动,2006,26(6):144-146.
[3]安巍,张刚志.预应力技术在砌体结构中的应用[J].各界.科技与教育,2007(12):39.
[4]宋彧,周乐伟,原国华.砌体结构预应力斜拉筋加固抗震性能试验研究[J].兰州理工大学学报,2008,34(5):118-121.
[5]孙伟民,郭樟根,胡晓明,等.预应力混凝土小型空心砌块带窗洞砌体抗震性能试验[J].南京工业大学学报,2002,9(5):7-11.
[6]林锦滔.两层砌体结构双向拟动力试验及抗震性能评价[D].福州:福州大学,2010.
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