改正作業(yè)

1、分塊截面幾何特性跨中截面分塊名稱分塊面積分塊面積分塊面積形心到上緣距離分塊面積對(duì)上緣靜矩分塊面積自身慣矩di=ysyi分塊面積對(duì)截面形心慣矩I=IiIxcm2cmcm3cm4cmcm4cm4大毛截面翼板36007.52700067500561136016911427669三角承托15016.667250020847331459331668腹板261087.522837545729382414815476054485下三角360153.3

2、5518880009028917672899767馬蹄1080170183600360001061220946312245463∑780049666346846462827440632959052小毛截面翼板27007.5202505062563.501088772410938349三角承托15016.667250020854.33442842443050腹板261087.5228375457293816.507104105283347

3、下三角360153.355188800082.3024382722446272馬蹄10801701836003600099.001058467610620676∑690048991346677712506392329731694大毛截面形心到上緣距離ys1=63.67cm小毛截面形心到上緣距離ys2=71.00cm檢驗(yàn)截面效率指標(biāo)(希望0.5)上核心距=36.33cm下核心距=66.36cm截面效率指標(biāo)=0.57說(shuō)明以上初步擬定主梁跨中

4、截面尺寸是合理的變化點(diǎn)截面分塊名稱分塊面積分塊面積分塊面積形心到上緣距離分塊面積對(duì)上緣靜矩分塊面積自身慣矩di=ysyi分塊面積對(duì)截面形心慣矩I=IiIxcm2cmcm3cm4cmcm4cm4大毛截面翼板36007.5270006750064.851513962115207121三角承托15016.667250020855.68465080465288腹板207072.515007522813130.15472281360下三角3601

5、23.344388800050.95934545942545馬蹄270015541850052083382.651844401018964843∑888064246328778553498330337861157小毛截面翼板27007.5202505062572.161406035914110984三角承托15016.667250020863.00595280595488腹板207072.515007522813137.16106217

6、2387530下三角360123.344388800043.64685499693499馬蹄270015541850052083375.341532417415845007汽6100%0.371.000.400.460.400.360.39提高系數(shù)1.031.001.031.031.031.001.03掛7100%0.421.000.440.540.450.400.38提高系數(shù)1.001.031.001.021.001.001.00提高

7、后Sji6824.71146.065337.22560.191324.80803.02978.08提高后Sjm6501.14183.655041.73574.001258.65792.13845.41鋼束布置計(jì)算鋼束其彎高度y1y2L1x3ΦRx2N1(N2)2112.198.8110099.2571182.35144.09N35112.1938.8110099.2575207.12634.59N4103.325.8877.421009

8、6.59152272.05588.05N512025.8894.1210096.59152762.15714.90N6120.8830.9089.9810095.11181838.41568.10各計(jì)算截面鋼束位置及鋼束群位置x4(cm)R（cm)sincosa0(cm)ai(cm)ay(cm)α弧度14點(diǎn)N1(N2)1182.3599.0019.72N35207.1299.00N42272.0516.716.70N565.232762

9、.150.023620.999723030.770.02362N682.651838.410.044960.998994243.860.04497變化點(diǎn)N1(N2)71.031182.350.060070.99819911.1449.120.06011N3565.215207.120.108550.99409939.770.10876N4515.342272.050.226820.9739416.775.920.22881N5650.2

10、32762.150.235410.9719030107.630.23764y角度ax5x5tan(a)a0ai支點(diǎn)N1(N2)21.007.0032.323.979.0026.0372.17N351.0015.0028.637.679.0052.33N4103.3015.0029.307.8516.70112.15N5120.0015.0021.265.7030.00144.30N6鋼束長(zhǎng)度計(jì)算RΦ曲線長(zhǎng)S直線長(zhǎng)X1直線長(zhǎng)L1有效長(zhǎng)度預(yù)

11、留長(zhǎng)度總長(zhǎng)N1(N2)1182.357.00144.451238.97100.002966.85140.003106.85N35207.127.00636.17744.79100.002961.91140.003101.91N42272.0515.00594.82794.66100.002978.96140.003118.96N52762.1515.00723.13659.77100.002965.80140.003105.80N618

12、38.4118.00577.55642.35100.002639.82140.002779.82截面面積和慣矩計(jì)算分塊名稱分塊面積分塊面積重心到上緣距離分塊面積對(duì)上緣靜矩全截面重心到上緣距離分塊面積自身慣矩diIy管道面積=46.566n=6ny=5.57跨中凈截面毛截面6900.0071.0048991366.75297316944.26124964扣除管道面積279.40160.7244905093.972467380Σ6667.1