低周反复荷载下二层再生混凝土框架抗震性能试验研究
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摘要
通过对1榀单跨二层再生混凝土框架进行低周反复试验,研究其结构的破坏特征、滞回性能、骨架曲线、强度和刚度退化和耗能能力等。同时,利用预先设置在钢筋上的应变片研究和分析再生混凝土框架梁柱中纵筋、箍筋关键点应变在低周反复荷载下的变化规律。试验结果表明,再生混凝土框架梁端、柱脚荷载-曲率滞回曲线较丰满,有良好耗能能力。结构变形为屈服时的3.5倍时,其承载力无明显降低。再生混凝土框架具有良好的抗震性能,应用于工程实际是可行的。
A two-story reinforced recycled aggregates concrete(RAC) frame was tested under low-cycle repeated load.The failure characteristics,hysteretic behavior,skeleton curve,strength degradation,stiffness degradation and energy dissipation capacity etc.were evaluated.Meanwhile,the change law of the strains on the reinforcement bars located in columns and beams was also analyzed using the embedded strain gages.The experimental results show that hysteretic curves obtained from the tested RAC frame have plump shapes,indicating the RAC frame has good energy dissipation capacity.No significant decrease was found in bearing capacity when the deformation reached 3.5 times the yield deformation.The seismic performances of RAC frame are quite good and the application of RAC frame is feasible for civil engineering structures.
A two-story reinforced recycled aggregates concrete(RAC) frame was tested under low-cycle repeated load.The failure characteristics,hysteretic behavior,skeleton curve,strength degradation,stiffness degradation and energy dissipation capacity etc.were evaluated.Meanwhile,the change law of the strains on the reinforcement bars located in columns and beams was also analyzed using the embedded strain gages.The experimental results show that hysteretic curves obtained from the tested RAC frame have plump shapes,indicating the RAC frame has good energy dissipation capacity.No significant decrease was found in bearing capacity when the deformation reached 3.5 times the yield deformation.The seismic performances of RAC frame are quite good and the application of RAC frame is feasible for civil engineering structures.
引文
[1]肖建庄,雷斌,袁飚.不同来源再生混凝土抗压强度分布特征研究[J].建筑结构学报,2008,29(5):94-100.
[2]Gholamreza Fathifazl,Razaqpur A G,Burkan Isgor O,et al.Flexural Performance of Steel-Reinforced Recycled Concrete Beams[J].ACI Structural Journal,2009,106(6):858-867.
[3]Gholamreza Fathifazl,Razaqpur A G,Burkan Isgor O,et al.Shear Strength of Steel Reinforced Recycled Concrete Beams withStirrups[J].Magazine of Concrete Research,2010,62(10):685-699.
[4]Xiao Jianzhuang,Huang Xiao,Shen Luming.Seismic Behavior ofSemi-Precastcolumn with Recycled Aggregate Concrete[J].Construction and Building Materials,2012,35:988-1001.
[5]Valeria Corinaldesi,Viviana Letelier,Giacomo Moriconi.Behavior of Beam-Column Joints Made of Recycled-AggregateConcrete Under Cyclic Loading[J].Construction and BuildingMaterials,2011,25:1877-1882.
[6]孙跃东,肖建庄,周德源,等.再生混凝土框架抗震性能的试验研究[J].土木工程学报,2006,39(5):10-15.
[7]柳炳康,黄慎江,宋满荣,等.预制预应力混凝土装配整体式框架拟动力试验研究[J],地震工程与工程振动,2010,30(5):65-71.
[2]Gholamreza Fathifazl,Razaqpur A G,Burkan Isgor O,et al.Flexural Performance of Steel-Reinforced Recycled Concrete Beams[J].ACI Structural Journal,2009,106(6):858-867.
[3]Gholamreza Fathifazl,Razaqpur A G,Burkan Isgor O,et al.Shear Strength of Steel Reinforced Recycled Concrete Beams withStirrups[J].Magazine of Concrete Research,2010,62(10):685-699.
[4]Xiao Jianzhuang,Huang Xiao,Shen Luming.Seismic Behavior ofSemi-Precastcolumn with Recycled Aggregate Concrete[J].Construction and Building Materials,2012,35:988-1001.
[5]Valeria Corinaldesi,Viviana Letelier,Giacomo Moriconi.Behavior of Beam-Column Joints Made of Recycled-AggregateConcrete Under Cyclic Loading[J].Construction and BuildingMaterials,2011,25:1877-1882.
[6]孙跃东,肖建庄,周德源,等.再生混凝土框架抗震性能的试验研究[J].土木工程学报,2006,39(5):10-15.
[7]柳炳康,黄慎江,宋满荣,等.预制预应力混凝土装配整体式框架拟动力试验研究[J],地震工程与工程振动,2010,30(5):65-71.
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