2號梁 截面（僅混凝土）幾何特性計算表4-2(4)（含打印sheet.xls

1、主梁跨中截面幾何特性計算表42分塊名稱分塊面積Ai(㎜2)分塊面積形心至上緣距離yi(㎜)分塊面積對上緣靜矩Si=Aiyi(㎜3)分塊面積的自身慣矩Ii(㎜4)di=ysyi(㎜)分塊面積對截面形心慣矩Ix=Aidi2(㎜4)I=IiIx(㎜4)bhAi大毛截面翼緣板22001503300007524750000618750000740.531.81E111.81587E11三角承托500150750002001500000093750

2、000615.532.842E1028509871070腹板200180036000010503780000009.72E10234.471.979E101.16991E11下三角175175306251891.6757932291.6752105034.71076.133.547E1035517765253馬蹄55025013750020752853125007161458331259.472.181E112.18826E11∑220

3、0933125760994791.75.81432E11小毛截面翼緣板16001502400007518000000450000000819.581.612E111.61662E11三角承托500150750002001500000093750000694.583.618E1036277103979腹板200180036000010503780000009.72E10155.428.696E091.05896E11下三角17517530

4、6251891.6757932291.6752105034.7997.083.045E1030498776316馬蹄55025013750020752853125007161458331180.421.916E111.92307E11∑2200843125754244791.75.2664E11小ys894.58大ys815.53小yx1305.42大yx1384.47結(jié)構(gòu)基頻f：3.946512388小ks478.49大ks450.0

5、66652沖擊系數(shù)u：0.226879458小kx698.23大kx764.042286截面效率指標ρρ小0.53ρ0.5ρ0.5截面效率指標ρ均大于0.50.5，表明以上初擬主梁跨中截面是合理的。ρ大0.55主梁支點截面幾何特性計算表44分塊名稱分塊面積Ai(㎜2)分塊面積形心至上緣距離yi(㎜)分塊面積對上緣靜矩Si=Aiyi(㎜3)分塊面積的自身慣矩Ii(㎜4)di=ysyi(㎜)分塊面積對截面形心慣矩Ix=Aidi2(㎜4)I=

6、IiIx(㎜4)bhAi大毛截面翼緣板22001503300007524750000618750000835.122.302E112.30771E11三角承托32597.531687.5182.55782968.7516734960.9727.621.678E1016793265642腹板5501800990000105010395000002.673E11139.881.937E102.8667E11下三角0001950.000010

7、39.8800馬蹄55025013750020752853125007161458331164.881.866E111.87295E11∑22001489187.513553454697.21529E11小毛截面翼緣板16001502400007518000000450000000888.841.896E111.9006E11三角承托32597.531687.5182.55782968.7516734960.9781.341.935E1

8、019361798025腹板5501800990000105010395000002.673E1186.167.349E092.74649E11下三角0001950.0000986.1600馬蹄55025013750020752853125007161458331111.161.698E111.70484E11∑22001399187.513485954696.54554E11小ys963.84大ys910.12小yx1236.16大y