梁端钢丝网约束RC带板梁抗震性能研究
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摘要
试验共设计了4个试件,其中1个为对比试件,另外3个为在梁端塑性铰区钢筋骨架外侧绑扎不同层数和不同网格间距的镀锌焊接钢丝网的加强试件。通过低周反复加载试验,研究在低周反复荷载作用下镀锌焊接钢丝网加强试件与对比试件的受力特性、破坏特征、滞回曲线、延性和刚度退化等抗震性能的变化。试验结果表明,梁端绑扎镀锌焊接钢丝网能够有效改善和延缓混凝土保护层的脱落,试件的延性、刚度退化程度明显好于梁端未绑扎镀锌焊接钢丝网的试件。
Four members were designed in the test,including comparison one and another three members with different layers and apertures of galvanized welded steel mesh assembled outside of hoop reinforcement in the area of beam-end plastic hinge area. Through the low-cyclic loading test,the seismic behaviors of the four members were studied including mechanical characteristics,damage characteristics,hysteresis curve,ductility and stiffness degradation. Test results show that assembling the galvanized welded steel mesh at beam end can effectively improve and delay the spall of the concrete cover,and help the ductility and the stiffness degradation level behave significantly better than those of the regular member.
Four members were designed in the test,including comparison one and another three members with different layers and apertures of galvanized welded steel mesh assembled outside of hoop reinforcement in the area of beam-end plastic hinge area. Through the low-cyclic loading test,the seismic behaviors of the four members were studied including mechanical characteristics,damage characteristics,hysteresis curve,ductility and stiffness degradation. Test results show that assembling the galvanized welded steel mesh at beam end can effectively improve and delay the spall of the concrete cover,and help the ductility and the stiffness degradation level behave significantly better than those of the regular member.
引文
[1]李宏男,肖诗云,霍林生.汶川地震震害调查与启示[J].建筑结构学报,2008,29(4):10-19.
[2]李振宝,刘春阳,高等利,等.钢筋混凝土梁板柱空间节点抗震性能试验研究[J].世界地震工程,2011,27(2):16-20.
[3]刘立新,桑大勇,王仁义.锚贴钢板加固钢筋混凝土梁受弯性能的试验研究[J].建筑结构,2007,37(S1):290-293.
[4]赵彤,谢剑,戴自强.碳纤维布加固钢筋混凝土梁的受弯承载力试验研究[J].建筑结构,2000,30(7):11-15.
[5]吴刚,安琳,吕志涛.碳纤维布用于钢筋混凝土梁抗弯加固的试验研究[J].建筑结构,2000,30(7):3-7.
[6]曹国辉,方志,吴继峰.FRP片材加固钢筋混凝土梁二次受力试验研究[J].建筑结构,2005,35(3):30-33.
[7]GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.
[2]李振宝,刘春阳,高等利,等.钢筋混凝土梁板柱空间节点抗震性能试验研究[J].世界地震工程,2011,27(2):16-20.
[3]刘立新,桑大勇,王仁义.锚贴钢板加固钢筋混凝土梁受弯性能的试验研究[J].建筑结构,2007,37(S1):290-293.
[4]赵彤,谢剑,戴自强.碳纤维布加固钢筋混凝土梁的受弯承载力试验研究[J].建筑结构,2000,30(7):11-15.
[5]吴刚,安琳,吕志涛.碳纤维布用于钢筋混凝土梁抗弯加固的试验研究[J].建筑结构,2000,30(7):3-7.
[6]曹国辉,方志,吴继峰.FRP片材加固钢筋混凝土梁二次受力试验研究[J].建筑结构,2005,35(3):30-33.
[7]GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011.
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