THE EXPERIMENTAL STUDY OF CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE MOUNTED CFRP
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摘要: 针对内嵌(Near-Surface Mounted,简称NSM)加固法的特点,进行了4根内嵌碳纤维增强塑料(Concrete Fiber Reinforced Polymer,简称CFRP)板条加固混凝土梁的试验研究。试验结果表明,内嵌CFRP板条加固混凝土梁能显著提高混凝土梁的极限承载能力和弯曲刚度,有效阻止混凝土裂缝的产生和发展,并对混凝土和钢筋的受力起分摊作用;加固量相同时,内嵌CFRP加固梁性能要优于外贴CFRP加固梁,加固材料强度利用率较高。内嵌加固法是一种新的加固形式,具有广阔的发展前景。Abstract: In accordance with the characteristics of Near-Surface Mounted(NSM) method,four beams are experimented strengthened with NSM Concrete Fiber Reinforced Polymer(CFRP) laminates.The results show that NSM CFRP can remarkably improve the bearing-capacity and stiffness of RC beams,it can also effectively restrict the crack,and CFRP laminates also share force with concrete and steel bar.NSM CFRP is more effective than EBR CFRP,and the use of the CFRP laminates is more effective strengthened with NSM.NSM method is a new way of strengthening,and it has a wide apply.
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Key words:
- NSM /
- CFRP /
- strengthened /
- concrete beams /
- experimental
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