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FRP增强混凝土缺口梁破坏模式的数值模拟

DOI: doi:10.3969/j.issn.1006-7043.2011.11.009

Keywords: 纤维增强复合材料(FRP), 缺口梁, 混凝土, 破坏模式, 裂纹扩展??

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Abstract:

为了探讨纤维增强复合材料(FRP)加固混凝土缺口梁的缺口高度(a0)和FRP片材长度(Lx)对破坏模式及其极限承载力的影响,对缺口梁在集中载荷作用下的内部裂纹扩展、破坏模式及极限承载力进行了数值模拟,并从极限承载力和声发射信号方面入手探讨了FRP片材对混凝土梁的加固机理.数值模拟给出了载荷-位移曲线、声发射-位移曲线和混凝土梁的破坏过程的最小主应力分布图.模拟结果与实验结果较吻合.研究结果表明,该数值模拟方法为FRP片材加固混凝土构件的力学性能和破坏机理的研究提供了一种新的方法.

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