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页数:6页
时间:2019-06-03
《20m箱梁张拉伸长量计算》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、20m箱梁伸长量计算CD:537BC:2879.8AB:6348μ=0.25k=0.0015线段L(m)θ(rad)kx+终点力AB6.34800.0095220.99052193.448BC2.87980.09599310.02831780.97208188.047CD0.53700.00080550.999195187.89AB:ΔL1=45.2BC:ΔL2=20.1CD:ΔL3=3.7(45.2+20.1+3.7)×2=138(mm)CD:2015BC:2879.8AB:4923.4μ=0.25k=0.0015线段L(m)θ(rad)kx+终点力AB4.
2、923400.0073850.992642193.863BC2.87980.09599310.0283180.972079188.45CD2.01500.00302250.996982187.881AB:ΔL1=35.1BC:ΔL2=20.1CD:ΔL3=13.9(35.1+20.1+13.9)×2=138.2(mm)CD:7901BC:733AB:1065μ=0.25k=0.0015线段L(m)θ(rad)kx+终点力AB1.06500.00159750.9984194.988BC0.7330.02443460.00720820.9928178193.587
3、CD7.90100.0106370.989420191.538AB:ΔL1=7.6BC:ΔL2=5.2CD:ΔL3=55.7(7.6+5.2+55.7)×2=137(mm)σcon=1860×0.75=1395(MPa)N=σcon×Ay=1395×140=195300=195.3(KN)N1(4根):195.3×4=781.2(KN)N2(4根):195.3×4=781.2(KN)N3(3根):195.3×3=585.9(KN)4束:15%:117.18,30%:234.36,50%:390.63束:15%:87.885,30%:175.77,50%:292
4、.95压力表:750231,千斤顶:9081894束:15%30%50%100%103%P(KN)117.18234.36390.6781.2F(Mpa)3.87.713.0026.226.93束:15%30%50%100%103%P(KN)87.885175.77292.95585.9F(Mpa)2.805.769.719.620.1压力表:750184,千斤顶:9081944束:15%30%50%100%103%P(KN)117.18234.36390.6781.2F(Mpa)4.18.013.226.226.93束:15%30%50%100%103%P(
5、KN)87.885175.77292.95585.9F(Mpa)3.16.110.0019.720.3压力表:50227,千斤顶:9081974束:15%30%50%100%103%P(KN)117.18234.36390.6781.2F(Mpa)4.348.2313.4226.3827.163束:15%30%50%100%103%P(KN)87.885175.77292.95585.9F(Mpa)3.376.2810.1719.920.48压力表:750183,千斤顶:9081914束:15%30%50%100%103%P(KN)117.18234.3639
6、0.6781.2F(Mpa)4.077.9213.025.926.73束:15%30%50%100%103%P(KN)87.885175.77292.95585.9F(Mpa)3.15.999.8519.520.0rad读作弧度。是一个角度的单位。1rad=180°/π也就是说π弧度等于180弧长的定义:一段弧的长度叫做弧长。弧长的计算公式:在半径是R的圆中,因为360°的圆心角所对的弧长就等于圆周长C=2πR,所以n°圆心角所对的弧长为l=nπR÷180。比如半径为1cm,45°的圆心角所对的弧长为l=nπR÷180=45×3.14×1÷180=0.785(
7、cm)=7.85(mm)
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