| 目次へ 【床_据付_矩形】 |
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設備耐震_床_据付_矩形 |
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TRUE |
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| ●ボルトの引抜力 Rb |
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1 |
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| Rb=[Fh*hg-(W-Fv)*Lg]/(L*nt) |
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0 |
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FALSE |
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=[35.18*103-(45.1-17.59)*51]/(102*2)=10.88[kN/本] |
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5 |
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0 |
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1 |
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| ここで、 |
Fh=設計用水平地震力=Kh*W0=1*35.18=35.18[kN] |
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Kh=設計用水平震度=1 |
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1 |
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W=機器重量=45.1[kN] |
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45.1 |
35.18 |
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hg=据付け面より機器重心までの高さ=103[cm] |
9.7 |
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103 |
205 |
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Fv=設計用鉛直地震力=Fh/2=35.18/2=17.59[kN] |
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102.5 |
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Lg=重心位置=51[cm] |
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51 |
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L=ボルトスパン=102[cm] |
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nt=引張ボルト総本数=2 |
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102 |
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n=ボルトの総本数=8 |
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2 |
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W0=機器有効重量=35.18[kN] |
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| ●ボルトの検定 |
d=D-2*te=102-2*0.028=101.944[cm] |
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| σ=Rb/A=10.88/1.131=9.62[kN/cm2] < 17.6[kN/cm2] |
W0=有効重量=35.18[kN] |
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| τ=Fh/(n*A)=35.18/(8*1.131)=3.89[kN/cm2]
< 10.1[kN/cm2] |
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8 |
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A=ボルト1本当たり軸断面積=π*d^2/4=1.131[cm2] |
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d=ボルト径=1.2[cm] |
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ft=許容引張応力度=17.6[kN/cm2] |
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fs=許容せん断応力度=10.1[kN/cm2] |
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fts=許容引張応力度=1.4ft-1.6τ=1.4*17.6-1.6*3.89=17.6[kN/cm2] |
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0 |
0 |
| ●アンカーボルト埋め込み長さ |
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2 |
0 |
| Ta=6*π*L^2*p=6*π*16^2*0.011=53.08[kN/本]
> Rb=10.88 |
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| 又はTa=ft*A=19.91
> Rb=10.88 |
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Ta=短期許容引抜き荷重 |
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L=ボルト埋め込み長さ=16[cm] |
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6 |
中ボルト |
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p=補正係数=(1/6)*(0.05+Fc/100)=(1/6)*(0.05+1.8/100)=0.011 |
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Fc=コンクリートの設計基準強度=1.8[kN/cm2] |
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16 |
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アンカーボルト=埋込式_J形_M12 |
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0 |
埋込式J形基礎ボルト |
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0 |
埋込式_J形 |
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TRUE |
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1.8 |
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