BFRP加固钢筋混凝土方柱抗震性能试验研究
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摘要
对7根纤维布加固柱和1根对比柱进行了拟静力试验,通过各因素下钢筋混凝土方柱破坏现象的对比,以及各试件的荷载-变形曲线的分析,探讨了不同加固方式下钢筋混凝土柱的抗震性能,试验结果表明:玄武岩纤维布对钢筋混凝土方柱起到较好的约束作用,能限制裂缝的产生和开展,改善钢筋混凝土柱的最终破坏状态,大幅度提高钢筋混凝土柱的耗能性能和变形能力。
A pseudo static test was carried out for seven fiber reinforced columns and one contrast columns. Through the comparison of reinforced concrete column failure phenomenon,and the analysis of load deformation curves of the specimens,the seismic performance of reinforced concrete columns under different reinforcement was discussed. The test results show that BFRP plays an important role in restraining the reinforced concrete columns,limiting the generation and development of cracks,improving the ultimate failure state of reinforced concrete columns,and greatly improving the energy dissipation capacity and deformation capacity of reinforced concrete columns.
A pseudo static test was carried out for seven fiber reinforced columns and one contrast columns. Through the comparison of reinforced concrete column failure phenomenon,and the analysis of load deformation curves of the specimens,the seismic performance of reinforced concrete columns under different reinforcement was discussed. The test results show that BFRP plays an important role in restraining the reinforced concrete columns,limiting the generation and development of cracks,improving the ultimate failure state of reinforced concrete columns,and greatly improving the energy dissipation capacity and deformation capacity of reinforced concrete columns.
引文
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[2]叶列平,冯鹏. mmFRP在工程结构中的应用与发展[J].土木工程学报,2006(3):24-36.
[3] HARRIES K A,KHAREL G. Experimental investigation of the behavior of variably confined concrete[J]. Cement&Concrete Research,2003,33(6):873-880.
[4]岳清瑞.我国碳纤维(CFRP)加固修复技术研究应用现状与展望[J].工业建筑,2000,30(10):23-26.
[5]胡显奇,申屠年.连续玄武岩纤维在军工及民用领域的应用[J].高科技纤维与应用,2005(12):7-13.
[6]陈阳,王岚,李振伟.玄武岩纤维性能及应用[J].保温材料与建筑节能,2000(8):28-30.
[7]中国建筑研究院.普通混凝土力学性能试验方法标准:GB/T50081-2002[S].北京:中国建筑工业出版社,2003.
[8]哈尔滨玻璃钢研究所.定向纤维增强塑料拉伸性能试验方法:GBT3354-1999[S].北京:中国标准出版社,1999.
[9]唐爱华,张敏.混凝土方柱截面圆角对碳纤维加固效果的影响[J].施工技术,2004,33(6):22-22.
[10]沈在康.混凝土结构试验方法新标准应用讲评[M].北京:中国建筑工业出版社,1994.
[11]周安,扈惠敏.土木工程结构试验与检测[M].南京:东南大学出版社,2013.