既有钢筋混凝土梁抗震性能试验研究
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摘要
既有钢筋混凝土构件的特性不同于拟建构件,除了可能存在设计构造方面的不足之外,还受到所经受的荷载历程和环境腐蚀的影响。根据5根既有钢筋混凝土梁的低周往复加载试验,得到了既有钢筋混凝土梁的破坏特征。根据试验中得到的滞回曲线计算既有钢筋混凝土梁的耗能能力和延性,分析了不同的加载制度对其耗能能力的影响。结论表明,既有构件所经历的最大荷载及最大荷载出现的相对时序均会影响到既有构件的抗震性能。
The characteristics of existing reinforced concrete members may be influenced by load histories and environmental corrosion besides insufficiency in design.Based on the test results of five existing reinforced concrete beams,the failure characteristics of existing reinforced concrete beams were studied.Energy dissipation capacity and ductility of existing reinforced concrete beams were calculated according to the hysteretic curves obtained in test.The influences of different loading regimes on the energy dissipation capacity of existing reinforced concrete beams were analyzed.The study indicates that the maximum displacement in the load histories is an important influence factor to the seismic behavior of existing reinforced concrete members.
The characteristics of existing reinforced concrete members may be influenced by load histories and environmental corrosion besides insufficiency in design.Based on the test results of five existing reinforced concrete beams,the failure characteristics of existing reinforced concrete beams were studied.Energy dissipation capacity and ductility of existing reinforced concrete beams were calculated according to the hysteretic curves obtained in test.The influences of different loading regimes on the energy dissipation capacity of existing reinforced concrete beams were analyzed.The study indicates that the maximum displacement in the load histories is an important influence factor to the seismic behavior of existing reinforced concrete members.
引文
[1]陶峰,王林科,王庆霖.服役钢筋混凝土构件承载力的试验研究[J].工业建筑,1996,26(4):17-20.
[2]刘兴远,周珉,陈伟,等.既有钢筋混凝土梁工作特性试验研究[J].四川建筑科学研究,2002,28(3):17-18.
[3]吴波,刘志强,林少书,等.香港现役钢筋混凝土连梁的抗震性能试验研究[J].世界地震工程,2002,18(2):9-16.
[4]雷拓,吕西林,钱江,等.既有钢筋混凝土框架原位推覆试验研究[J].建筑结构学报,2009,30(5):23-30.
[5]PARK R,DAI R-T.Ductility of doubly reinforced concretebeam sections[J].ACI structural Journal,1989,85(2):217-225.
[6]任宝双,钱稼茹,聂建国.在用钢筋混凝土简支桥面梁受弯刚度估算[J].工业建筑,2001,31(1):13-15.
[7]刘兴远,周珉,邓安福.既有钢筋混凝土梁工作特性数值分析[J].四川建筑科学研究,2002,28(4):7-9.
[8]屈文俊,张誉,车惠民.既有混凝土结构的碳化预测[J].建筑结构,1999,29(4):31-37.
[9]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.
[2]刘兴远,周珉,陈伟,等.既有钢筋混凝土梁工作特性试验研究[J].四川建筑科学研究,2002,28(3):17-18.
[3]吴波,刘志强,林少书,等.香港现役钢筋混凝土连梁的抗震性能试验研究[J].世界地震工程,2002,18(2):9-16.
[4]雷拓,吕西林,钱江,等.既有钢筋混凝土框架原位推覆试验研究[J].建筑结构学报,2009,30(5):23-30.
[5]PARK R,DAI R-T.Ductility of doubly reinforced concretebeam sections[J].ACI structural Journal,1989,85(2):217-225.
[6]任宝双,钱稼茹,聂建国.在用钢筋混凝土简支桥面梁受弯刚度估算[J].工业建筑,2001,31(1):13-15.
[7]刘兴远,周珉,邓安福.既有钢筋混凝土梁工作特性数值分析[J].四川建筑科学研究,2002,28(4):7-9.
[8]屈文俊,张誉,车惠民.既有混凝土结构的碳化预测[J].建筑结构,1999,29(4):31-37.
[9]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.
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