米后张法箱梁钢绞线张拉计算书中跨梁

30米后张法箱梁钢绞线张拉计算书（中跨梁）钢束编号每根长度（cmm）钢绞线直径（ccm）钢绞线根数张拉吨位（KNN）理论伸长值（cm）10%20%100%103%N1308615.24478.12156.24781.2804.621.4N2308921.4N3309221.4N4307021.4压力表读数1936表2.24.522.222.8千斤顶号：1##1957表2.24.421.822.4千斤顶号：2##张拉顺序：N1N3N2N4后张梁钢绞线伸长值计算钢绞线弹性模量：Ey=1.97×105MpaAy=140mm2Ryb=0.75×1860=1395Mpak=0.0015μ=0.20千斤顶工作长度一端按50cm考虑正弯矩钢绞线（中跨梁）1、N1束各段长度箱梁中心线箱梁中心线FEDCBAoo㈠、AB段(锚固段)为直线段，无摩阻力，x=0.5mPp=P=1395×140=195300N㈡、BC段为直线段，有摩阻力，x＝1.506m，kx=0.002259PP===195079.6N㈢、CD段为曲线段，有摩阻力，θ＝0.0314x＝=0.785mkx=0.0011775kx+uθ=0.0074575PP===194354.00N㈣、DE段为直线段x=30.86/2-0.65-1.506-0.785-3.925-0.885=7.679mkx=0.0115125PP===193239.5N㈤、EF段为曲线段X==3.925m,θ＝0.08722kx+uθ=0.023332PP===191002.6N㈥、FO段为直线段，，x＝0.885m，Kx＝0.0013275N，PP===190875.9N计算理论伸长值：LAB=PpL/ApEp=195300×0.5/(140×1.97×105)=0.00354m=0.35cmLBC=PpL/ApEp=195079.6×1.506/(140×1.97×105)=0.01065m=1.07cmLCD=PpL/ApEp=194354×0.785/(140×1.97×105)=0.00553m=0.55cmLDE=PpL/ApEp=193239.5×7.679/(140×1.97×105)=0.0538m=5.38cmLEF=PpL/ApEp=191002.6×3.925/(140×1.97×105)=0.02718m=2.72cmLFO=PpL/ApEp=190875.9×0.885/(140×1.97×105)=0.00612m=0.61cm△L总＝2×（0.35+1.07+0.55+5.38+2.72+0.61）＝21.4㎝2、N2束各段长度箱梁中心线箱梁中心线FEDCBAoo㈠、AB段(锚固段)为直线段，无摩阻力，x=0.5mPp=P=1395×140=195300N㈡、BC段为直线段，有摩阻力，x＝1.506m，kx=0.002259PP===195079.6N㈢、CD段为曲线段，有摩阻力，θ＝0.0314x＝=0.785mkx=0.0011775kx+uθ=0.0074575PP===194354.00N㈣、DE段为直线段x=30.89/2-0.65-1.506-0.785-3.925-2.507=6.072mkx=0.009108PP===193471.6N㈤、EF段为曲线段X==3.925m,θ＝0.08722kx+uθ=0.023332PP===191232N㈥、FO段为直线段，，x＝2.507m，Kx＝0.0037605N，PP===190872.9N计算理论伸长值：LAB=PpL/ApEp=195300×0.5/(140×1.97×105)=0.00354m=0.35cmLBC=PpL/ApEp=195079.6×1.506/(140×1.97×105)=0.01065m=1.07cmLCD=PpL/ApEp=194354×0.785/(140×1.97×105)=0.00553m=0.55cmLDE=PpL/ApEp=193471.6×6.072/(140×1.97×105)=0.0426m=4.26cmLEF=PpL/ApEp=191232×3.925/(140×1.97×105)=0.0272m=2.72cmLFO=PpL/ApEp=190872.9×2.507/(140×1.97×105)=0.01735m=1.74cm△L总＝2×（0.35+1.07+0.55+4.26+2.72+1.74）＝21.4㎝3、N3束各段长度箱梁中心线箱梁中心线FEDCBAoo㈠、AB段(锚固段)为直线段，无摩阻力，x=0.5mPp=P=1395×140=195300N㈡、BC段为直线段，有摩阻力，x＝1.506m，kx=0.002259PP===195079.6N㈢、CD段为曲线段，有摩阻力，θ＝0.0314x＝=0.785mkx=0.0011775kx+uθ=0.0074575PP===194354.00N㈣、DE段为直线段x=30.92/2-0.65-1.506-0.785-3.925-4.129=4.465mkx=0.0066975PP===193704.6N㈤、EF段为曲线段X==3.925m,θ＝0.08722kx+uθ=0.023332PP===191462.3N㈥、FO段为直线段，，x＝4.129m，Kx＝0.0061935N，PP===1900870..6N计算理论伸长值值：LAB=PpL//ApEp=1955300××0.5//(1400×1.997×1005)=0.0003544m=0.355cmLBC=PpL//ApEp=1955079..6×1..506//(1400×1.997×1005)=0.010655m=1.077cmLCD=PpL//ApEp=1944354××0.7885/(1140×11.97××105)=0.005533m=0.555cmLDE=PpL//ApEp=1933704..6×4..465//(1400×1.997×1005)=0.031366m=3.144cmLEF=PpL//ApEp=1911462..3×3..925//(1400×1.997×1005)=0.0272mm=2.722cmLFO=PpL//ApEp=1900870..6×4..129//(1400×1.997×1005)=0.0285776m=2.866cm△L总＝2×（0.35+1..07+00.55++3.144+2.772+2..86）＝221.4㎝4、N4束各段长长度AAO箱梁中心线DCB㈠、AB段(锚固段)为直线线段，无摩摩阻力，x=0.55mPp=P=13955×1400=1955300NN㈡、BC段为直线段，无无摩阻力，x=300.7/22-0.665-0..73-112.9001＝1.069mkx=0.000160335PP==＝1955143..5N㈢、CD段为曲线段，有有摩阻力，x＝=0.733m，kx+uθ=00.0022651PP===1948855.1NN㈣、DO段为直线段，有有摩阻力，x＝12.901mm,kx=0.00193552PP===1933011..5N计算理论伸长值值：LAB=PpL//ApEp=1955300××0.5//(1400×1.997×1005)=0.0003544m=0.4ccmLBC=PpL//ApEp=1955143..5×1..069//(1400×1.997×1005)=0.0075664m=