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20米箱梁预应力张拉伸长量计算(最终10.9)

2023-12-16 来源:爱站旅游
导读20米箱梁预应力张拉伸长量计算(最终10.9)


20米箱梁预应力张拉伸长量计算

钢铰线强度:1860MPa 控制应力:1860×0.75=1395 MPa

钢铰线公称面积:140 mm2

单根控制力:1395×140.0=195300 N

伸长量计算公式:△L=Pp×L÷(Ap×Ep)

一、 中跨

1#束

①直线段长 0.537米 ②竖曲线段长 L=π÷180°×a×R=3.1415926÷180°×5.5°×30.0=2.880米 ③直线段长 4.869 米 ④平曲线段长 L=π÷180°×a×R=3.1415926÷180°×1.8°×25.0=0.785÷COS5.5°=0.789 ⑤直线段长 0.728米 ⑥工具段长 0.74米(由于箱梁板顶预埋筋影响,千斤顶不能靠近锚环,为不弯曲板顶预埋筋,需增加一个过渡环,具体尺寸为:锚环0.046m+限位板0.035m+过渡环0.25m+千斤顶0.363m+锚环0.046m=0.74m)

Pp=P×(1-e-(kx+μθ))÷(kx+μθ)

Pp=P=195300 N Ep=198 GPa

得:

⑥的伸长量:

e=2.718281828 k=0.0015 x=0.74 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×0.74))÷(0.0015×0.74)

=195191.52 N

195191.52×740÷(140×198000)=5.21mm

⑤的伸长量:

e=2.718281828 k=0.0015 x=1.468 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×1.468))÷(0.0015×1.468)

=195085.00 N

195085.00×728÷(140×198000)=5.12mm

④的伸长量:

e=2.718281828 k=0.0015 x=2.257 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×2.257+0.25×0.03142))÷(0.0015×2.257+0.25×0.03142)=194206.34 N

194206.34×789÷(140×198000)=5.53 mm

③的伸长量:

e=2.718281828 k=0.0015 x=7.126 μ=0.25

θ=1.8°×0.017453293=0.03142

)195300×(1-2.71828-(0.0015×7.126+0.25×0.03142))÷(0.0015×7.126+0.25×0.03142)

=193500.19 N

193500.19×4869÷(140×198000)=34.00mm

②的伸长量:

e=2.71828 k=0.0015 x=10.006 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×10.006+0.25×0.12741))÷(0.0015×10.006+0.25×0.12741)=190794.5 N

190794.5×2880÷(140×198000)=19.82mm

①的伸长量:

e=2.718281828 k=0.0015 x=10.543 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×10.543+0.25×0.12741))÷(0.0015×10.543+0.25×0.12741)=190718.28 N

190718.28×537÷(140×198000)=3.69mm

1#束的伸长量为:

5.21+5.12+5.53+34.0+19.82+3.69=73.37×2=146.74 mm

2#束

①直线段长 2.015米 ②竖曲线段长 L=π÷180°×a×R=3.1415926÷180°×5.5°×30.0=2.88米 ③直线段长 3.408 米 ④平曲线段长 L=π÷180°×a×R=3.1415926÷

180°×1.8°×25.0=0.785÷COS5.5°=0.789 ⑤直线段长 0.728米 ⑥工具段长 0.49米(锚环0.046m+限位板0.035m+千斤顶0.363m+锚环0.046m=0.49m)

Pp=P×(1-e-(kx+μθ))÷(kx+μθ)

Pp=P=195300 N Ep=198 GPa

得:

⑥的伸长量:

e=2.718281828 k=0.0015 x=0.49 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×0.49))÷(0.0015×0.49)

=195228.11 N

195228.11×490÷(140×198000)=3.45 mm

⑤的伸长量:

e=2.718281828 k=0.0015 x=1.218 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×1.218))÷(0.0015×1.218)

=195121.57 N

195121.57×728÷(140×198000)=5.12mm

④的伸长量:

e=2.718281828 k=0.0015 x=2.007 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×2.007+0.25×0.03142))÷(0.0015×2.007+0.25×0.03142)=194242.69 N

194242.69×789÷(140×198000)=5.53 mm

③的伸长量:

e=2.718281828 k=0.0015 x=5.415 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×5.415+0.25×0.03142))÷(0.0015×5.415+0.25×0.03142)=193747.94 N

193747.94×3408÷(140×198000)=23.82 mm

②的伸长量:

e=2.71828 k=0.0015 x=8.295 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×8.295+0.25×0.12741))÷(0.0015×8.295+0.25×0.12741)=191037.63 N

191037.63×2880÷(140×198000)=19.85 mm

①的伸长量:

e=2.718281828 k=0.0015 x=10.31 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×10.31+0.25×0.12741))÷(0.0015×10.31+0.25×0.12741)=190751.34 N

190751.34×2015÷(140×198000)=13.87 mm

2#束的伸长量为:

3.45+5.12+5.53+23.82+19.85+13.87=71.64×2=143.28 mm

3#束

①直线段长 7.901米 ②竖曲线段长 L=π÷180°×a×R=3.1415926÷180°×1.4°×30.0=0.733米 ③直线段长 1.065 米 ④工具段长 0.74米(由于箱梁板顶预埋筋影响,千斤顶不能靠近锚环,为不弯曲板顶预埋筋,需增加一个过渡环,具体尺寸为:锚环0.046m+限位板0.035m+过渡环0.25m+千斤顶0.363m+锚环0.046m=0.74m)

Pp=P×(1-e-(kx+μθ))÷(kx+μθ)

Pp=P=195300 N Ep=198 GPa

得:

④的伸长量:

e=2.718281828 k=0.0015 x=0.74 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×0.74))÷(0.0015×0.74)

=195191.52 N

195191.52×740÷(140×198000)=5.21 mm

③的伸长量:

e=2.718281828 k=0.0015 x=1.805 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×1.805))÷(0.0015×1.805)

=195035.72 N

195035.72×1065÷(140×198000)=7.49 mm

②的伸长量:

e=2.71828 k=0.0015 x=2.538 μ=0.25

θ=1.4°×0.017453293=0.02443

195300×(1-2.71828-(0.0015×2.538+0.25×0.02443))÷(0.0015×2.538+0.25×0.02443)=194334.91 N

194334.91×733÷(140×198000)=5.14 mm

①的伸长量:

e=2.71828 k=0.0015 x=10.439 μ=0.25

θ=1.4°×0.017453293=0.02443

195300×(1-2.71828-(0.0015×10.439+0.25×0.02443))÷(0.0015×10.439+0.25×0.02443)=193189.76 N

193189.76×7901÷(140×198000)=55.06mm

3#束的伸长量为:

5.21+7.49+5.14+55.06=72.9×2=145.8 mm

二、 边跨

1#束

①直线段长 2.148米 ②竖曲线段长 L=π÷180°×a×R=3.1415926÷180°×5.5°×30.0=2.880米 ③直线段长 3.308 米 ④平曲线段长 L=π÷180°×a×R=3.1415926÷180°×1.8°×25.0=0.785÷COS5.5°=0.789 ⑤直线段长 0.724米 ⑥工具段长 0.64米(由于箱梁板顶预埋筋影响,千斤顶不能靠近锚环,为不弯曲板顶预埋筋,需增加一个过渡环,具体尺寸为:锚环0.046m+限位板0.035m+过渡环0.15m+千斤顶0.363m+锚环0.046m=0.64m)

Pp=P×(1-e-(kx+μθ))÷(kx+μθ)

Pp=P=195300 N Ep=198 GPa

得:

⑥的伸长量:

e=2.718281828 k=0.0015 x=0.64 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×0.64))÷(0.0015×0.64)

=195206.15 N

195206.15×640÷(140×198000)=4.51 mm

⑤的伸长量:

e=2.718281828 k=0.0015 x=1.364 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×1.364))÷(0.0015×1.364)

=195100.21 N

195100.21×724÷(140×198000)=5.10 mm

④的伸长量:

e=2.718281828 k=0.0015 x=2.153 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×2.153+0.25×0.03142))÷(0.0015×2.153+0.25×0.03142)=194221.46 N

194221.46×789÷(140×198000)=5.53 mm

③的伸长量:

e=2.718281828 k=0.0015 x=5.461 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×5.461+0.25×0.03142))÷(0.0015×5.461+0.25×0.03142)=193741.28 N

193741.28×3308÷(140×198000)=23.12 mm

②的伸长量:

e=2.71828 k=0.0015 x=8.341 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×8.341+0.25×0.12741))÷(0.0015×8.341+0.25×0.12741)=191031.09 N

191031.09×2880÷(140×198000)=19.85 mm

①的伸长量:

e=2.718281828 k=0.0015 x=10.489 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×10.489+0.25×0.12741))÷(0.0015×10.489+0.25×0.12741)=190725.94 N

190725.94×2148÷(140×198000)=14.78 mm

1#束的伸长量为:

4.51+5.10+5.53+23.12+19.85+14.78=72.89+73.37=146.26 mm

2#束

①直线段长 3.608米 ②竖曲线段长 L=π÷180°×a×R=3.1415926÷180°×5.5°×30.0=2.88米 ③直线段长 1.84 米 ④平曲线段长 L=π÷180°×a×R=3.1415926÷180°

×1.8°×25.0=0.785÷COS5.5°=0.789 ⑤直线段长 0.724米 ⑥工具段长 0.64米(由于箱梁板顶预埋筋影响,千斤顶不能靠近锚环,为不弯曲板顶预埋筋,需增加一个过渡环,具体尺寸为:锚环0.046m+限位板0.035m+过渡环0.15m+千斤顶0.363m+锚环0.046m=0.64m)

Pp=P×(1-e-(kx+μθ))÷(kx+μθ)

Pp=P=195300 N Ep=198 GPa

得:

⑥的伸长量:

e=2.718281828 k=0.0015 x=0.64 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×0.64))÷(0.0015×0.64)

=195206.15 N

195206.15×640÷(140×198000)=4.51 mm

⑤的伸长量:

e=2.718281828 k=0.0015 x=1.364 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×1.364))÷(0.0015×1.364)

=195100.21 N

195100.21×724÷(140×198000)=5.10 mm

④的伸长量:

e=2.718281828 k=0.0015 x=2.153 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×2.153+0.25×0.03142))÷(0.0015×2.153+0.25×0.03142)=194221.46 N

194221.46×789÷(140×198000)=5.53mm

③的伸长量:

e=2.718281828 k=0.0015 x=3.993 μ=0.25

θ=1.8°×0.017453293=0.03142

195300×(1-2.71828-(0.0015×3.993+0.25×0.03142))÷(0.0015×3.993+0.25×0.03142)

=193954.17 N

193954.17×1840÷(140×198000)=12.87mm

②的伸长量:

e=2.71828 k=0.0015 x=6.873 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×6.873+0.25×0.12741))÷(0.0015×6.873+0.25×0.12741)=191240.01N

191240.01×2880÷(140×198000)=19.87 mm

①的伸长量:

e=2.718281828 k=0.0015 x=10.481 μ=0.25

θ=7.3°×0.017453293=0.12741

195300×(1-2.71828-(0.0015×10.481+0.25×0.12741))÷(0.0015×10.481+0.25×0.12741)=190727.08 N

190727.08×3608÷(140×198000)=24.82 mm

2#束的伸长量为:

4.51+5.10+5.53+12.87+19.87+24.82=72.7+71.64=144.34 mm

3#束

①直线段长 8.021米 ②竖曲线段长 L=π÷180°×a×R=3.1415926÷180°×1.4°×30.0=0.733米 ③直线段长 1.065 米 ④工具段长 0.74米(由于箱梁板顶预埋筋影响,千斤顶不能靠近锚环,为不弯曲板顶预埋筋,需增加一个过渡环,具体尺寸为:锚环0.046m+限位板0.035m+过渡环0.25m+千斤顶0.363m+锚环0.046m=0.74m)

Pp=P×(1-e-(kx+μθ))÷(kx+μθ)

Pp=P=195300 N Ep=198 GPa

得:

④的伸长量:

e=2.718281828 k=0.0015 x=0.74 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×0.74))÷(0.0015×0.74)

=195191.52 N

195191.52×740÷(140×198000)=5.21 mm

③的伸长量:

e=2.718281828 k=0.0015 x=1.805 μ=0.25

θ=0°

195300×(1-2.71828-(0.0015×1.805))÷(0.0015×1.805)

=195035.72 N

195035.72×1065÷(140×198000)=7.49 mm

②的伸长量:

e=2.71828 k=0.0015 x=2.538 μ=0.25

θ=1.4°×0.017453293=0.02443

195300×(1-2.71828-(0.0015×2.538+0.25×0.02443))÷(0.0015×2.538+0.25×0.02443)=194334.91 N

194334.91×733÷(140×198000)=5.14 mm

①的伸长量:

e=2.71828 k=0.0015 x=10.559 μ=0.25

θ=1.4°×0.017453293=0.02443

195300×(1-2.71828-(0.0015×10.559+0.25×0.02443))÷(0.0015×10.559+0.25×0.02443)=193172.44 N

193172.44×8021÷(140×198000)=55.90 mm

3#束的伸长量为:

5.21+7.49+5.14+55.90=73.74+72.9=146.64 mm

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