| FRP板长度对混凝土加固梁破坏过程的影响 |
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| 引用本文： | 张娟霞,朱万成,唐春安,郭献章.FRP板长度对混凝土加固梁破坏过程的影响[J].东北大学学报(自然科学版),2011,32(10):1495-1498. |
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| 作者姓名： | 张娟霞 朱万成 唐春安 郭献章 |
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| 作者单位： | 1. 东北大学秦皇岛分校材料科学与工程系,河北秦皇岛,066004
2. 东北大学资源与土木工程学院,辽宁沈阳,110819 |
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| 基金项目： | 国家自然科学基金资助项目(50874024,51074042); 霍英东教育基金会资助项目(122023) |
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| 摘 要： | 用数值试验方法分析了破坏过程中FRP板中的应力传递过程,即从FRP承担拉应力起,到应力增大直至最后失去承载力.通过对粘贴不同FRP板长度对于加固后结构的力学性能的影响的分析,可以看出FRP板的长度直接影响结构破坏时的极限应变.在适当的范围内,FRP板的加固长度越大,梁的极限应变和梁的韧性越大,FRP板中承担的拉应力和外荷载位移越大,混凝土梁破坏时底部产生的裂缝越多;FRP板越短,越容易产生剥离破坏.
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| 关 键 词： | 数值试验 混凝土裂纹 变形与破坏 FRP板长度 破坏过程 |
Influence of FRP Sheet Length on Failure Process of Reinforced Concrete Beam |
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| ZHANG Juan-xia,ZHU Wan-cheng,TANG Chun-an,GUO Xian-zhang.Influence of FRP Sheet Length on Failure Process of Reinforced Concrete Beam[J].Journal of Northeastern University(Natural Science),2011,32(10):1495-1498. |
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| Authors: | ZHANG Juan-xia ZHU Wan-cheng TANG Chun-an GUO Xian-zhang |
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| Institution: | ZHANG Juan-xia1,ZHU Wan-cheng2,TANG Chun-an2,GUO Xian-zhang1(1.Department of Materials Science and Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China,2.School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China.) |
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| Abstract: | The stress transmission process in the FRP sheet was analyzed numerically during the failure process of the FRP reinforced concrete specimen,characterized as the stress initiation,propagation and final decay of the loading capacities.Based on the examination of the mechanical properties of reinforced concrete structures under different FRP sheet lengths,it was found that the ultimate strain and the toughness,as well as the loading capacity and tensile stress sustained by the FRP sheet,increase with the RFP ... |
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| Keywords: | numerical test concrete cracking deformation and failure FRP sheet length failure process |
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