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RELIABILITY ANALYSIS OF RC CONCRETE BEAMS STRENGTHENED WITH NSM CFRP TENDONS
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摘要: 基于内嵌碳纤维(简称CFRP)筋抗弯加固混凝土梁的试验研究,开展变加固量内嵌CFRP筋加固梁可靠指标计算分析,探讨内嵌CFRP筋加固钢筋混凝土梁的可靠度水平随加固量的变化情况。结果表明:内嵌CFRP筋加固梁能够充分利用CFRP的高强特点,明显提高被加固梁的可靠性,其可靠指标提高幅度最大为79.52%。综合各方面因素分析可知,内嵌2根CFRP筋的加固效果最好。Abstract: Based on the flexural experimental research on RC concrete beams strengthened with NSM CFRP tendons,the reliability index before and after reinforced concrete beams strengthened with the amount of CFRP tendons was studied．The reliability analysis of different amount of RC concrete beams strengthened with NSM CFRP tendons was discussed．The results showed that the reliability index could be enhanced maximally by 79.52%,which not only made full use of the intensity of the CFRP tendons,but also improved observably the reliability of the reinforced beams．The reinforcement effect with two NSM CFRP tendons was better than the others．
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Key words:
- CFRP /
- reinforced concrete beam /
- reinforcement /
- reliability
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GB 500102002 混凝土结构设计规范[S]. [2] 张宇，李思明．粘钢加固钢筋混凝土梁可靠性分析[J].湖南大学学报，2005，32(6): 11-14. [3] 贡金鑫，赵国藩，柳林．钢筋混凝土轴心受压构件加固后可靠度分析[J].建筑结构，2000，30(3): 29-33. [4] 丁亚红．内嵌预应力筋材加固混凝土梁弯曲性能研究[D].河南: 河南理工大学，2009. [5] GB 5015292 混凝土结构试验方法标准[S]. [6] 袁霓绯，姚谏．钢筋混凝土梁表层嵌贴CFRP 板抗弯承载力研究[J].工业建筑，2006，36(10): 104-106. [7] GB 500682001 建筑结构设计可靠度统一标准[S]. [8] 杨勇新．碳纤维布加固混凝土梁的可靠度分析[J].建筑结构学报(增刊) ，2008(S1): 88-91. [9] GB 500092001 建筑结构荷载规范[S]. [10] 贡金鑫，魏巍巍．工程结构可靠性设计原理[M].北京: 机械工业出版社，2007. [11] 赵国藩，金伟良，贡金鑫．结构可靠度理论[M].北京: 中国建筑工业出版社，2000: 21-52． -
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