在内嵌筋材加固混凝土试件中,良好的粘结质量是保证加固效果的关键.通过对13根内嵌碳纤维复合材料(CFRP)筋的拔出试验,研究了内嵌加固的粘结剪应力、破坏模式、试验现象,分析了混凝土强度、开槽尺寸对粘结性能的影响.结果表明,粘结试件达到破坏荷载时,剪应力的最大值出现在距加载端100 ～ 200mm的范围内;当发生结构胶与混凝土界面破坏时,随着混凝土强度的增加,粘结强度增大;开槽尺寸对破坏模式的影响较大.研究结果为实际工程应用提供依据,具有一定的参考价值.
参考文献
| [1] | 丁亚红.内嵌预应力筋材加固混凝土梁弯曲性能研究[D].焦作:河南理工大学,2009.6.,2009. |
| [2] | 丁亚红,张美香.混凝土构件加固技术发展概述[J].工业建筑,2012(02):139-143,91. |
| [3] | 王兴国,岳军辉.RC结构表层嵌入FRP加固技术研究概述[J].玻璃钢/复合材料,2012(04):124-128. |
| [4] | 丁亚红,高艳娥.工程结构新型加固方法概述[J].玻璃钢/复合材料,2012(03):75-79. |
| [5] | 孙永梅,刘永军,孟宪宏.纤维增强复合材料（FRP）在砌体结构加固中的应用与研究进展[J].玻璃钢/复合材料,2012(01):77-82. |
| [6] | 周延阳,姚谏.混凝土表层嵌贴FRP粘结机理研究进展[J].科技通报,2006(02):221-230. |
| [7] | De Lorenzis L.Strengthening of RC structures with near surface mounted FRP rods[D].Department of Innovation Engineering,University of Lecce,Italy,2002.,2002. |
| [8] | Francesca Ceroni,Marisa,Pecce.Bond behavior of FRP NSM systems in concrete elements[J].Composites:Part B,2012,(43):99-109.,2012. |
| [9] | Shehab M .Soliman,Ehab El-Salakawy,Brahim Benmokranc.Bond performance of near surface mounted FRP bars[J].Composites Construction ASCE,2010,1 |
| [10] | Zenon Achillides,Kypros Pilakoutas .Bond behavior of fiber reinforced polymer bars under direct pullout conditions[J].Composites Construction ASCE,2004,173 |
| [11] | Firas Al-Mahmoud,Amaud Castel,ect .Anchorage and tension stiffening effect between near-surface-mounted CFRP rods and concrete[J].Cement & Concrete Composites,2011,33 |
| [12] | De Lorenzis L,Nanni A .Bond between NSM fiber-reinforenced polymer rods and concrete in structure strengthening[J].ACI Structure,2002,99(2):32-123.,2002. |
| [13] | De Lorenzis L,Rizzo A,La Tegola A .A modified pull-out test for bond of near-surface mounted FRP rods in concrete[J].Composites:Part B,2002,33(8):589-603.,2002. |
| [14] | De Lorenzis L,Lundgren K,Rizzo A .Anchorage length of nearsurface mounted FRP bars for concrete strengthening experimental investigation and numerical modeling[J].ACI Structure,2004,101(2):78-269.,2004. |
| [15] | Parretti R,Nanni A .Strengthening of RC members using near-surface mounted FRP composites design overview[J].Adv.Structure,2004,7(6):83-469.,2004. |
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