碳纤维加固横向梁弯矩部分计算表格

加固梁的编号KL10\12KL3KL12/14KL12/15梁的位置5-E\F轴5-4轴5-J~5-K轴下筋5-H~5-J轴下筋5-E\F\J\K轴交5-7轴5-E\F\J\K轴交5-8轴梁的混凝土强度fc016.7016.7016.7016.70Mpa梁的宽度b700.00500.00500.00500.00mm梁的高度h800.001000.00800.00800.00mma(a')25.0025.0025.0025.00mm计算需要配的钢筋As4100.005200.005800.005800.00mm*mm原有受拉钢筋面积As03436.003927.002945.402945.40mm*mm原有受拉钢筋强度fy0360.00360.00360.00360.00Mpa原有受压钢筋面积As0'3216.003216.004909.004909.00mm*mm原有受压钢筋强度fy0'360.00360.00360.00360.00Mpa计算受压区高度x(As*fy0-fy0'*As0')/(fc0*b)27.2285.5438.4138.41mm计算受压区高度取值x50.0085.5450.0050.00mmξξb0.06满足要求1计算极限荷载Mu(fc0*b*x*(h0-x*0.5)+fy0'As0'(h0-a')1306.701765.711638.561638.56（kN.m）2计算极限荷载MuAs*fy0*（h0-a')1107.001778.401566.001566.00（kN.m）计算极限荷载Mu取值1107.001765.711566.001566.00（kN.m）原有钢筋情况下的受压区高度x0(As0*fy0-fy0'*As0'）/(fc0*b)6.7830.65-84.66-84.66(mm)原有钢筋情况下的受压区高度取值x050505050mmξξb0.06满足要求1原有钢筋情况下的极限承载力Mu0fy0*As0(h-a'-a)927.721343.03795.26795.26（kN.m）2原有钢筋情况下的极限承载力Mu0fc0bx0（h-0.5*x0）+fy0'As0'(h0-a')1306.701496.501638.561638.56（kN.m）原有钢筋情况下的极限荷载Mu0取值927.721343.03795.26795.26（kN.m）粘贴碳纤维强度ff2300.002300.002300.002300.00Mpa实际粘贴碳纤维层数nf2.002.004.004.00实际粘贴碳纤维厚度t0.1670.1670.1670.167mm实际粘贴碳纤维宽度b'350.00500.00500.00500.00mm实际碳纤维层数折减系数km0.900.900.900.90实际粘贴碳纤维截面积Afe'105.21150.30300.60300.60mm*mm强度折减系数ψf=（0.8*0.0033*h/x'）-0.0033）/0.0073.892.813.893.89ψf取值当ψf1，取1.0，否则取ψf1.001.001.001.00实际粘贴碳纤维后的计算受压区高度x'M-fy0'As0'(h-a')+fy0As0(h-h0)=fc0bx'（h-0.5*x'）26.1684.0434.0934.09mm实际粘贴碳纤维后的计算受压区高度x'取值50.0084.0450.0050.00mmξ0.85ξb0.06满足要求1计算需要的碳纤维面积Afefc0bx'-fy0As0+fy0'As0'=ψfffAfe219.70193.81488.87488.87mm*mm实际粘贴碳纤维面积Afe'Afe，满足要求在不考虑二次受力的情况下，ψf≥1时取1.0碳纤维加固横向梁弯矩部分1、2分别对应受压区高度大于和小于2a'的情况当nf=1时，km=1;当nf=2时，km=0.9;当nf=3时，km=0.83;当nf=4时，km=0.73