考虑翼缘有效宽度的钢筋混凝土T梁的抗剪承载力

Shear strength of reinforced concrete T beams considering effective flange width

以钢筋混凝土矩形梁抗剪承载力计算公式为研究基础,考虑钢筋混凝土T梁受压区的宽度,定义了一个翼缘有效宽度,推导出考虑翼缘有效宽度的钢筋混凝土T梁的抗剪承载力计算公式.收集整理了1根钢筋混凝土矩形梁和61根钢筋混凝土T梁的抗剪试验数据,比较了国内外不同规范和推导公式的抗剪承载力计算结果,发现规范公式对T梁的抗剪承载力计算是偏于安全的,且推导公式计算值与试验数据吻合较好.研究结果表明:考虑钢筋混凝土T梁的翼缘宽度可明显提高抗剪承载力,推导的公式更具合理性.

Based on the shear bearing capacity calculation formula of reinforced concrete rectangular beams,with considering the compression width of reinforced concrete T beams and defining an effective flange width,the formula of shear bearing capacity of reinforced concrete T beam was deduced with considering the effective flange width. The shear test data of 1 reinforced concrete rectangular beam and61 reinforced concrete T beams were collected. The calculation results of shear bearing capacity were compared with different domestic and overseas specifications and deduced formula. The standard formula for calculating shear bearing capacity of T beams is safe,while the calculated results by deduced formula are in good agreement with test data. The flange width of reinforced concrete T beams can obviously improve shear bearing capacity,and the deduced formula is more suitable.