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进行了 1 3根玻璃纤维 (GFRP)片材加固混凝土梁和 2个对比混凝土梁的抗剪性能试验研究 ,分析了GFRP加固梁的抗剪性能。试验结果表明 ,粘贴GFRP片材可以有效地提高梁的抗剪承载力 ,GFRP片材的受力机理和箍筋相同 ,加固梁的抗剪承载力取决于GFRP片材的有效应变。根据试验结果 ,提出了GFRP片材有效应变的计算公式 ,并依据混凝土规范的计算模型 ,提出了加固梁的抗剪承载力计算公式
The shear resistance of 13 reinforced concrete beams strengthened with glass fiber reinforced plastic (GFRP) and two contrast concrete beams were studied. The shear resistance of GFRP strengthened beams was analyzed. The experimental results show that the bonding of GFRP sheet can effectively improve the shear strength of the beam. The mechanical mechanism of the GFRP sheet is the same as that of the stirrups. The shear capacity of the reinforced beam depends on the effective strain of the GFRP sheet. According to the test results, the calculation formula of effective strain of GFRP sheet is put forward. According to the calculation model of concrete code, the formula of shear strength of reinforced beam is proposed