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1、1:倉段計算1.1:直段:(一)受力分析(標準值)區(qū)段ABCD到倉頂距離(m)(s)1.256.257.58.7Uks/p=0.080.420.50.581-e-uks/p0.0770.3430.3930.44修正系數Ch1111Ph=Chrp/u(1-e-uks/p)(KPa)6.0426.8930.8134.5Pv=Cvrpuk(1-e-ukhn/p)Cv=1.3(KPa)23.56104.87120.16134.55環(huán)向拉力(標準值)Nhs=PhD/2(KN)18.1280.6792.43103.5倉頂載荷及自重
2、作用力,垂直壓力(KN)1.333.253.734.29摩擦力產生垂直壓力(KN/m)2.2125.9837.07449.36單排倉風載產生拉、壓力直段高H=8.7m直徑D=6mH/D=8.7/6=1.45接近1.5,且D>4m,可按深倉理論計算。倉頂荷載:袋式除塵器:424kg,其它等共600kg~kg/m倉頂自重1211kg~65kg/m。壁板:δ=431.4kg/m2δ=539.25kg/m2u:貯料與摩擦系數,k:側壓力系數k=tg(450-φ/2)s:倉頂到計算截面距離p:水力半徑Cn:水平壓力修正系數Cv:
3、垂直壓力修正系數。r:貯料密度.1.6t/m3=15.68KN/m3(二、)壁板厚度及橫勁1、區(qū)段A:高度(0~.1.25m)a、壁板厚度:P環(huán)=18.12KN/mP壓=18.12KN/m取δ=4mmσ切=[(18.12/9.8)x100]/(0.4x100)=46.2kg/cm2σ法=[(3.54/9.8)x100]/(0.4x100)=9.03kg/cm2σ切+σ法σ總==47kg/cm2<1700kg/cm2b、橫勁頂蓋均布載荷:=總載荷/(πr2)=(除塵+自+人群)/(πr2)=4300/(πr2)=1.50
4、KN/m2徑向力:Nφ=(1.5x3.037)/(2sin9o)=14.56KN/m環(huán)向力:Nθ=1.5x3.037xcos9octg9o=28.41KN/m環(huán)向拉力:T=14.56x3xcos9o=43.14KN=4.4T取[10A=12.74Cm2λ=4402/12.74=345kg/cm22、區(qū)段:Ca、壁板厚度:P環(huán)=92.43KN/mP壓=3.73+37.74=41.47KN/m取δ=5mmσ切=[(92.43/9.8)x100]/(0.5x100)=188.7kg/cm2σ法=[(41.47/9.8)x10
5、0]/(0.5x100)=84.63kg/cm2σ總=207kg/cm2<1700kg/cm2b、橫勁環(huán)向力P環(huán)=80.67KN/mN環(huán)=100.84KN/m取[10A=12.74Cm2λ=(100.84x1000)/(9.8x12.74)=807kg/cm23、區(qū)段:Da、壁板厚度:P環(huán)=103.5KN/mP壓=4.29+49.36=53.65KN/m取δ=6mmσ切=[(103.5/9.8)x100]/(0.6x100)=176kg/cm2σ法=[(53.65/9.8)x100]/(0.6x100)=91.24kg
6、/cm2σ總=198kg/cm2<1700kg/cm2b、橫勁環(huán)向力P環(huán)=92.43KN/mN環(huán)=113.22KN/m取[14A=18.51Cm2λ=(113.22x1000)/(9.8x18.51)=624.15kg/cm21.2、錐段:L(m)高度(m)豎向壓力(Pv)(KPa)環(huán)向壓力(KPa)法向壓力(PN)(KPa)環(huán)向拉力(KN/m)斜拉力(KN/m)68.7134.5534.567.27233.03280.063.11311.2134.5567.27120.90133.540.41113.54134.55
7、67.2715.9615.98法向拉力:PN=ξPVξ=cos2α+ksin2α=0.5k=0.3333α=60o環(huán)向拉力:NP=PNctgαl=38.838l斜拉力:Nmin=(lctgαl/2){PV+[r(sinα)/(3l2)](l3-l13)}吊掛設備引起的斜拉力忽略高度為8.7m處壁板強度:NP2+Nm2N總==364.33KN/m取δ=6mm則λ=(364.33x1000)/(9.8x0.6x100)=620kg/cm2<1700kg/cm21.3:環(huán)梁1:罐+貯+吊掛物=354t支柱處N=354/4=8
8、8.5此處椎段斜拉力=(88.5/sin60)x9.8=1001.47KNP環(huán)=500.73-103.5-233.03=164.20KN/mA=0.6X100+2X21.6X2=146.4cm2則λ=(164.2x1000)/(9.8A)=114.4kg/cm22、跨中:S=0.6X70X35+2X21.6X69=4450.8A=