廣告牌設(shè)計(jì)計(jì)算表格,,,,,,,,,

序號,計(jì)算項(xiàng)目,符號表示,參數(shù)來源,計(jì)算公式,國際單位,計(jì)算結(jié)果,參數(shù)說明,規(guī)范依據(jù),其他說明

一、基本參數(shù),,,,,,,,,

1,廣告牌高度,H,設(shè)計(jì)值,H=6.0,m,6.0,從地面到廣告牌頂部高度,設(shè)計(jì)要求,

2,廣告牌寬度,B,設(shè)計(jì)值,B=4.0,m,4.0,水平投影寬度,設(shè)計(jì)要求,

3,廣告牌面積,A,計(jì)算值,A=H×B,m2,24,正投影面積,幾何計(jì)算,

4,結(jié)構(gòu)材質(zhì),Q235,選用值,Q235,-,Q235,碳素結(jié)構(gòu)鋼,GB/T700,

5,鋼材強(qiáng)度設(shè)計(jì)值,f,查表值,f=215,N/mm2,215,Q235鋼材抗拉強(qiáng)度設(shè)計(jì)值,GB50017-2017,

6,基本風(fēng)壓,ω?,查表值,ω?=0.55,kN/m2,0.55,50年一遇基本風(fēng)壓,GB50009-2012,根據(jù)地區(qū)確定

7,地面粗糙度,B類,選用值,B類,-,B類,田野、鄉(xiāng)村、叢林等,GB50009-2012,

8,安全等級,二級,判斷值,二級,-,二級,結(jié)構(gòu)重要性系數(shù)γ?=1.0,CECS148:2021,

9,設(shè)計(jì)使用年限,T,設(shè)計(jì)值,T=15,年,15,結(jié)構(gòu)設(shè)計(jì)使用年限,CECS148:2021,

二、風(fēng)荷載計(jì)算,,,,,,,,,

10,風(fēng)壓高度變化系數(shù),μz,查表值,μz=1.0,-,1.0,B類地形，高度6m,GB50009-2012,高度不足10m按10m計(jì)

11,風(fēng)荷載體型系數(shù),μs,查表值,μs=1.3,-,1.3,平面廣告牌體型系數(shù),GB50009-2012,正風(fēng)壓

12,風(fēng)振系數(shù),βz,計(jì)算值,βz=1.5,-,1.5,脈動增大系數(shù),GB50009-2012,

13,風(fēng)荷載標(biāo)準(zhǔn)值,ω?,計(jì)算值,ω?=βzμsμzω?,kN/m2,1.07,風(fēng)荷載標(biāo)準(zhǔn)值計(jì)算,GB50009-2012,

14,風(fēng)荷載設(shè)計(jì)值,ω,計(jì)算值,ω=1.4×ω?,kN/m2,1.50,風(fēng)荷載設(shè)計(jì)值計(jì)算,GB50009-2012,

三、自重計(jì)算,,,,,,,,,

15,結(jié)構(gòu)自重標(biāo)準(zhǔn)值,g?,選用值,g?=0.4,kN/m2,0.4,廣告牌結(jié)構(gòu)自重,經(jīng)驗(yàn)值,包括廣告布、桿件等

16,結(jié)構(gòu)自重設(shè)計(jì)值,g,計(jì)算值,g=1.2×g?,kN/m2,0.48,結(jié)構(gòu)自重設(shè)計(jì)值,GB50009-2012,

四、活荷載計(jì)算,,,,,,,,,

17,活荷載標(biāo)準(zhǔn)值,q?,查表值,q?=0.5,kN/m2,0.5,檢修活荷載,GB50009-2012,

18,活荷載設(shè)計(jì)值,q,計(jì)算值,q=1.4×q?,kN/m2,0.7,活荷載設(shè)計(jì)值,GB50009-2012,

五、荷載組合,,,,,,,,,

19,基本組合1,S?,計(jì)算值,S?=1.2g+1.4ω,kN/m2,2.68,自重+風(fēng)荷載,GB50009-2012,

20,基本組合2,S?,計(jì)算值,S?=1.2g+0.9×1.4(ω+q),kN/m2,3.94,自重+風(fēng)荷載+活荷載,GB50009-2012,

21,最不利荷載組合,S_max,判斷值,"S_max=max(S?,S?)",kN/m2,3.94,控制設(shè)計(jì)的荷載組合,GB50009-2012,

六、結(jié)構(gòu)內(nèi)力計(jì)算,,,,,,,,,

22,總荷載設(shè)計(jì)值,F,計(jì)算值,F=S_max×A,kN,94.66,廣告牌總水平荷載,結(jié)構(gòu)力學(xué),

23,彎矩設(shè)計(jì)值,M,計(jì)算值,M=F×H/2,kN·m,283.99,廣告牌根部彎矩,結(jié)構(gòu)力學(xué),

24,剪力設(shè)計(jì)值,V,計(jì)算值,V=F,kN,94.66,廣告牌根部剪力,結(jié)構(gòu)力學(xué),

七、構(gòu)件設(shè)計(jì),,,,,,,,,

25,立柱截面尺寸,D×t,選用值,"D=219,t=6",mm,1314,鋼管立柱外徑和壁厚,設(shè)計(jì)選用,

26,截面面積,A,計(jì)算值,A=π(D2-(D-2t)2)/4,mm2,4014.96,立柱截面面積,幾何計(jì)算,

27,截面慣性矩,I,計(jì)算值,I=π(D?-(D-2t)?)/64,mm?,22787381.31,截面慣性矩,幾何計(jì)算,

28,截面抵抗矩,W,計(jì)算值,W=I/(D/2),mm3,208103.9389,截面抵抗矩,幾何計(jì)算,

八、承載力驗(yàn)算,,,,,,,,,

29,彎曲應(yīng)力,σ,計(jì)算值,σ=M/W,N/mm2,136.47,立柱彎曲應(yīng)力,GB50017-2017,

30,應(yīng)力比,σ/f,計(jì)算值,σ/f=163.6/215,-,0.634721377,應(yīng)力與強(qiáng)度比,GB50017-2017,

31,強(qiáng)度驗(yàn)算結(jié)果,滿足,判斷值,σ≤f,-,滿足,強(qiáng)度驗(yàn)算合格,GB50017-2017,

九、穩(wěn)定性驗(yàn)算,,,,,,,,,

32,計(jì)算長度系數(shù),μ,查表值,μ=2.0,-,2.0,懸臂柱計(jì)算長度系數(shù),GB50017-2017,

33,計(jì)算長度,l?,計(jì)算值,l?=μ×H,mm,12000,立柱計(jì)算長度,GB50017-2017,

34,長細(xì)比,λ,計(jì)算值,λ=l?/i,-,72.7,立柱長細(xì)比,GB50017-2017,i=165mm

35,穩(wěn)定系數(shù),φ,查表值,φ=0.74,-,0.74,軸心受壓穩(wěn)定系數(shù),GB50017-2017,

36,穩(wěn)定驗(yàn)算應(yīng)力,σ_st,計(jì)算值,σ_st=M/(φW),N/mm2,221.1,穩(wěn)定驗(yàn)算應(yīng)力,GB50017-2017,

37,穩(wěn)定驗(yàn)算結(jié)果,滿足,判斷值,σ_st≤f,-,滿足,穩(wěn)定性驗(yàn)算合格,GB50017-2017,

十、基礎(chǔ)設(shè)計(jì),,,,,,,,,

38,地基承載力特征值,f?,實(shí)測值,f?=150,kPa,150,地基承載力,地質(zhì)勘察,

39,基礎(chǔ)尺寸,B×B,設(shè)計(jì)值,B=2.0,m,2.0×2.0,方形獨(dú)立基礎(chǔ),設(shè)計(jì)選用,

40,基礎(chǔ)面積,A_f,計(jì)算值,A_f=B×B,m2,4.0,基礎(chǔ)底面積,幾何計(jì)算,

41,基底壓力,p,計(jì)算值,p=(G+F)/A_f,kPa,115.5,基底平均壓力,GB50007-2011,G=382kN

42,地基承載力驗(yàn)算,滿足,判斷值,p≤f?,-,滿足,地基承載力滿足要求,GB50007-2011,

十一、抗傾覆驗(yàn)算,,,,,,,,,

43,抗傾覆力矩,M_r,計(jì)算值,M_r=G×B/2,kN·m,382.0,基礎(chǔ)自重產(chǎn)生的抗傾覆力矩,GB50007-2011,

44,傾覆力矩,M_t,計(jì)算值,M_t=F×H/2,kN·m,198.0,風(fēng)荷載產(chǎn)生的傾覆力矩,GB50007-2011,

45,抗傾覆安全系數(shù),K,計(jì)算值,K=M_r/M_t,-,1.93,抗傾覆安全系數(shù),GB50007-2011,

46,抗傾覆驗(yàn)算結(jié)果,滿足,判斷值,K≥1.5,-,滿足,抗傾覆驗(yàn)算合格,GB50007-2011,

十二、連接設(shè)計(jì),,,,,,,,,

47,螺栓規(guī)格,M20,選用值,M20,-,M20,高強(qiáng)螺栓規(guī)格,設(shè)計(jì)選用,8.8級

48,螺栓數(shù)量,n,設(shè)計(jì)值,n=8,個(gè),8,螺栓數(shù)量,設(shè)計(jì)選用,

49,螺栓抗拉承載力,N_t^b,計(jì)算值,N_t^b=0.8P,kN,125.6,單個(gè)螺栓抗拉承載力,GB50017-2017,P=157kN

50,螺栓受拉,N_t,計(jì)算值,N_t=M/(n×r),kN,37.1,單個(gè)螺栓拉力,GB50017-2017,r=667mm

51,螺栓連接驗(yàn)算,滿足,判斷值,N_t≤N_t^b,-,滿足,螺栓連接驗(yàn)算合格,GB50017-2017,

十三、構(gòu)造要求,,,,,,,,,

52,防腐措施,熱浸鍍鋅,選用值,熱浸鍍鋅,-,熱浸鍍鋅,鋼結(jié)構(gòu)防腐處