桥梁预应力张拉伸长量计算

编号

张拉控制力区段

单端伸长量

平均张拉力张拉端的张拉力从张拉端至计算截面的孔道长度从张拉端至计

算截面曲线孔

道部分切线的夹角之和孔道摩阻系数孔道偏

差系数

预应力

筋的张

拉长度钢绞线截面面积钢绞线弹性模量

(KN)

ΔL (mm)

P p (N)

P (N)

χ (m)θ (Rad)μk L (m)A p (mm 2)Ep (MPa)kx+μθe -(kx+μθ)AB 6.07188875.61890000.8780

0.170.00150.878140 1.95E+050.0013170.9986839BC 9.59187563.15188875.598 1.3960.06981317

0.170.0015 1.396140 1.95E+050.013962240.9861348CD 51.30186510.87187563.157.508500.170.00157.5085140 1.95E+050.011262750.988800466.96AB 18.41188622.74189000 2.6650

0.170.0015 2.665140 1.95E+050.00399750.9960105BC 10.70185908.4188622.739 1.5710.157079633

0.170.0015 1.571140 1.95E+050.029060040.9713581CD

37.86185132.06185908.404 5.5835

0.170.0015 5.5835

140

1.95E+050.00837525

0.9916597

66.98AB 6.07188875.61890000.8780

0.170.00150.878140 1.95E+050.0013170.9986839BC 9.59187563.15188875.598 1.3960.06981317

0.170.0015 1.396140 1.95E+050.013962240.9861348CD 51.30186510.87187563.157.508500.170.00157.5085140 1.95E+050.011262750.988800466.96AB 18.41188622.74189000 2.6650

0.170.0015 2.665140 1.95E+050.00399750.9960105BC 10.70185908.4188622.739 1.5710.157079633

0.170.0015 1.571140 1.95E+050.029060040.9713581CD

37.86185132.06185908.404

5.5835

0.170.0015 5.5835

140

1.95E+050.00837525

0.9916597

66.98

预应力钢绞线采用φs 15.20钢绞线，标准强度f =1860MPa （1×7标准型），弹性模量E =1.95×105MPa，不计锚口摩阻损失的张拉控制应力为1350 MPa。边板

N1每束6根

1134

N2每束5根

945

中板

N1每束5根

945

N2每束4根

756