目次へ 【壁面_矩形断面】 |
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FALSE |
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●アンカーボルトの引張力[kN/本] |
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Rb=Fh*L3g/(L1*nt2)+(W+Fv)*L3g/(L2*nt1) |
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=1.4*18/(60*2)+(1.4+0.7)*18/(110*2)=0.382[kN] |
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1 |
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0 |
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または |
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Rb=Fh*(L2+L2g)/(L2*nt1)+(W+Fv)*L3g/(L2*nt1) |
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=1.4*(110+50)/(110*2)+(1.4+0.7)*18/(110*2)=1.19[kN] |
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よってRb=1.19[kN] |
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3 |
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Fh=設計用水平地震力=Kh*W=1*1.4=1.4[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=1.4[kN] |
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1.4 |
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L1=水平方向ボルトスパン=60[cm] |
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60 |
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L2=鉛直方向ボルトスパン=110[cm] |
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110 |
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L1g=水平方向重心位置=[cm] |
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L2g=鉛直方向重心位置=50[cm] |
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50 |
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L3g=壁面からの重心位置=18[cm] |
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18 |
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nt1=鉛直方向引張ボルト総本数=2 |
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2 |
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nt2=水平方向引張ボルト総本数=2 |
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2 |
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W0=有効重量=1.4[kN] |
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Fv=設計用鉛直地震力=Fh/2=0.7[kN] |
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●アンカーボルトのせん断力 |
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Q=√{Fh^2+(W+Fv)^2}/n=√{1.4^2+(1.4+1.4)^2}/4=0.631[kN] |
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4 |
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n=アンカーボルト総本数=4 |
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4 |
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●アンカーボルトの検定 |
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σ=Rb/A=1.19/0.785=1.516≦17.6[kN/cm2] |
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τ=√{Fh^2+(W+Fv)^2}/(n*A)=√{1.4^2+(1.4+0.7)^2}/(4*0.785)=0.804≦10.1[kN/cm2] |
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0 |
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A=アンカーボルト1本当たり軸断面積=π*d^2/4=0.785[cm2] |
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0 |
埋込式_J形 |
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d=アンカーボルト径=1[cm] |
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0 |
0 |
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ft=許容引張応力度=17.6[kN/cm2] |
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0 |
埋込式_J形 |
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fs=許容せん断応力度=10.1[kN/cm2] |
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fts=引張とせん断を同時に受けるボルトの許容引張応力度 |
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=1.4ft-1.6τ=1.4*17.6-1.6*0.804=23.354[kN/cm2] |
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8 |
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●アンカーボルト埋め込み長さ |
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Ta=6*π*L^2*p=6*π*8^2*0.011=13.27[kN/本]
> Rb=1.19 |
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10 |
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又はTa=ft*A=13.82
> Rb=1.19 |
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0 |
埋込式J形基礎ボルト |
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TRUE |
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Ta=短期許容引抜き荷重 |
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1.8 |
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L=ボルト埋め込み長さ=8[cm] |
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TRUE |
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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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1.8 |
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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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アンカーボルト=埋込式_J形_M10 |
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