侧立面嵌贴碳纤维增强塑料板条加固混凝土梁受剪承载力研究

发布时间：2018-11-20 04:16

【摘要】：为研究加固钢筋混凝土梁的受剪承载力,按照沿梁轴向非对称布置箍筋的方式浇筑13根钢筋混凝土梁试件,在箍筋布置较少侧混凝土梁侧立面保护层上嵌入或外贴碳纤维增强塑料板条对混凝土梁进行受剪切补强。对其进行弯曲试验,研究内嵌碳纤维增强塑料板条补强混凝土梁的破坏形态、承载力等情况,并与相应位置外贴等量碳纤维增强塑料板条的混凝土梁进行比较,分析内嵌或外贴在混凝土梁上的碳纤维增强塑料板条应变变化情况及补强混凝土梁受剪承载力影响因素和受剪承载力计算方法。研究表明,与对比梁相比,内嵌碳纤维增强塑料板条补强混凝土梁受剪承载力提高18.8%~45.8%,外贴碳纤维增强塑料板条补强混凝土梁受剪承载力提高12.5%~13.3%,提出的承载力计算式计算结果与试验值吻合较好。
[Abstract]:In order to study the shear capacity of reinforced concrete beams, 13 specimens of reinforced concrete beams were constructed according to the asymmetric arrangement of stirrups along the beam axis. The concrete beams are shearing reinforced with carbon fiber reinforced plastic sheets embedded or affixed to the protective layer of the lateral facade of concrete beams with less stirrups. The bending test was carried out to study the failure form and bearing capacity of the reinforced concrete beams reinforced with carbon fiber reinforced plastic sheets, and the results were compared with those of concrete beams with the same amount of carbon fiber reinforced plastic sheets attached to the corresponding positions. The strain variation of carbon fiber reinforced plastic slab embedded or affixed to concrete beams and the factors affecting the shear capacity of reinforced concrete beams and the calculation method of shear capacity are analyzed. The results show that compared with the contrast beam, the shear capacity of the reinforced concrete beams reinforced with carbon fiber reinforced plastic slabs is increased by 18.8% and 45.8%. The shear capacity of reinforced concrete beams reinforced with carbon fiber reinforced plastic sheets is increased by 12.5% 13.33.The calculated results of the proposed formula are in good agreement with the experimental values.
【作者单位】：湖南工程学院建筑工程学院;
【基金】：湖南省自然科学基金项目(11JJ6040) 湖南省教育厅优秀青年项目(11B033) 湖南省科技计划项目(2013GK3031)
【分类号】：TU375.1

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