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钢绞线根数:n=9根 1、拉力计算
钢绞线强度:Ryb?1860Mpa 系数:k?0.0015、u?0.25 钢绞线截面积:Ag?140mm2 钢绞线弹性模量:E?195Gpa 拉力:N?Ryb?0.75?Ag?n?1860?0.75?140?9?1757.7KN 2、分段终点力计算
AB BC CD DE EF FG x(m) ?(rad) 2.719 2.872 0.30 0.9145 0.9145 20.412 0 0.115157 0 0.131022 0.131022 0 kx?u? 0.004079 0.033097 0.000450 0.034127 0.034127 0.030618 e?(kx?u?) 0.99592981 0.96744451 0.99955010 0.96644855 0.96644855 0.96984598 终点力(KN) 1750.55 1693.56 1692.79 1636.00 1581.11 1533.43 ML LK KJ JI IH HG x(m) ?(rad) 1.504 5.355 1.00 0.9145 0.9145 1.650 0 0.215862 0.00 0.131022 0.131022 0 kx?u? 0.0022560 0.0619981 0.0015000 0.0341272 0.0341272 0.0024750 e?(kx?u?) 0.99774654 0.93988469 0.99850112 0.96644855 0.96644855 0.99752806 终点力(KN) 1753.74 1648.31 1645.84 1590.62 1537.25 1533.45 3、伸长量计算
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1757.7?2.7191?0.99593??0.01941m
9?140?1950.004081750.55?2.8721?0.96744?LBC???0.02013m
9?140?1950.033101693.56?0.31?0.99955?LCD???0.00207m
9?140?1950.0004501692.79?0.91451?0.96645?LDE???0.00619m
9?140?1950.0034131636.00?0.91451?0.96645?LEF???0.00599m
9?140?1950.0034131581.11?20.4121?0.96985?LFG???0.12936m
9?140?1950.0306181757.7?1.5041?0.99775?LML???0.01075m
9?140?1950.0022561753.74?5.3551?0.93988?LLK???0.03706m
9?140?1950.062001648.31?11?0.99850?LKJ???0.00670m
9?140?1950.00151645.84?0.91451?0.96645?LJI???0.00602m
9?140?1950.034131590.62?0.91451?0.96645?LIH???0.00582m
9?140?1950.0034131537.25?1.6501?0.99753?LHG???0.01031m
9?140?1950.002475?LAB?总伸长量: ?L?0.01941+0.02013+0.00207+0.00619+0.00599+0.12936+0.01075+0.03706+0.00670+0.00602+0.00582+0.01031=0.2598m 与设计伸长值差:25.98-26.00=-0.02cm
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40米T梁连续钢束伸长量计算
钢绞线根数:n=5根 1、拉力计算
钢绞线强度:Ryb?1860Mpa 系数:k?0.0015、u?0.25 钢绞线截面积:Ag?140mm2 钢绞线弹性模量:E?195Gpa 拉力:N?Ryb?0.75?Ag?n?1860?0.75?140?5?976.5KN 2、分段终点力计
钢束 N2钢束 分段 AB AB BC N1钢束 CD DE N3钢束 AB x(m) 8.00 0.3276 0.7737 ?(rad) 0 0 0.096866 0.096866 kx?u? 0.0120 0.0004914 0.0253770 0.0253770 0.0136875 0.021000 e?(kx?u?) 0.9880717 0.9995087 0.9749423 0.9749423 0.9864057 0.979219 终点力(KN) 964.85 976.02 951.56 927.72 915.11 956.21 0.7737 9.125 14 0 0 3、伸长量计算
976.5?81?0.9880717??0.1138m
5?140?1950.0120976.5?0.32761?0.999509??0.00234m N1钢束:?LAB?5?140?1950.0004914976.02?0.77371?0.974942?LBC???0.00546m
5?140?1950.025377951.56?0.77371?0.974942??0.00533m ?LCD?5?140?1950.025377927.72?9.1251?0.986406 ?LCD???0.06159m
5?140?1950.013688N2钢束 ?L=2??LAB?2?.
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?LCD??LCD??0.00234+0.00546+0.00533+0.06159??2=0.1494mmm
N3钢束 ?L=2??LAB?2?976.5?141?0.979219??0.1982m
5?140?1950.0210与设计伸长值差 N2:11.38-11.4=-0.02cm N1:4.94-15.0=-0.06cm N3:19.82-19.8=0.02cm
钢绞线根数:n=7根 1、拉力计算
钢绞线强度:Ryb?1860Mpa 系数:k?0.0015、u?0.25 钢绞线截面积:Ag?140mm 钢绞线弹性模量:E?195Gpa 拉力: N?Ry?0.7?Ag?n?1860?0.7?140?7?1276.0KN 2、分段终点力计
b220米空心板梁钢束伸长量计算
钢束 分段 AB x(m) 1.0752 2.4188 6.306 ?(rad) 0 0.2443 0 0 0.043633 0 kx?u? 0.0016128 0.0647032 0.009459 0.00090885 0.01286971 0.01182825 e?(kx?u?) 0.99838850 0.93734563 0.99058560 0.99909156 0.98721275 0.98824143 终点力(KN) 1273.94 1194.13 1182.88 1274.84 1258.54 1243.74 N2钢束 BC CD AB 0.6059 1.3086 7.8855 N1钢束 BC CD
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根据以下公式计算得
LΔL=?0Pe?(kx???)PL?1?e?(kx???)????AyEgAyEg?kx????N2钢束伸长量 △L=2×(0.00717+0.01564+0.03922)=0.06203×2=12.41mm N1钢束伸长量 △L=2×(0.00404+0.00868+0.05163)=0.06435×2=12.87mm
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40米T梁张拉计算书
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