目次へ 【架台_ブラケット】 |
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設備耐震_架台_ブラケット |
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y$ |
設備耐震_架台_高架台 |
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梁 |
主材 |
斜材 |
●横架材荷重計算 |
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TRUE |
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op1 |
TRUE |
シート名 |
曲げ材_炭素鋼_fb |
圧縮材_炭素鋼_fc |
圧縮材_炭素鋼_fc |
長期 |
qL=W/(α1*B)=3.3*100/(2*60)=2.75[kN/m] |
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op2 |
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材質op1 |
TRUE |
TRUE |
TRUE |
地震時 |
qS=qL*Kv=2.75*0.75=2.06[kN/m] |
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材質op2 |
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1 |
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材質 |
炭素鋼 |
炭素鋼 |
炭素鋼 |
ここで、 |
α1=構面数=2 |
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0 |
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2 |
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自重/偏心ch1 |
TRUE |
FALSE |
TRUE |
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B=機器幅=60[cm] |
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60 |
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形鋼combo1 |
4 |
4 |
4 |
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Kv=設計用鉛直震度=0.75 |
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56.7 |
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形鋼サイズcombo2 |
8 |
0 |
8 |
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W=機器実重量=3.3[kN] |
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200 |
3.3 |
2.57 |
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軸op3 |
TRUE |
TRUE |
TRUE |
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W0=機器有効重量=2.57[kN] |
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2.57 |
60 |
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軸op4 |
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FALSE |
FALSE |
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30 |
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軸 |
強軸 |
強軸 |
強軸 |
●応力計算 |
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基準強度F値 Tex6 |
23.5 |
23.5 |
23.5 |
横架材 |
M0=(2.75+2.06)*(60/100)^2*10^2/8=21.64[kN-cm] |
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ヤング率Tex8 |
20100 |
20100 |
20100 |
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Q0=(2.75+2.06)/2=1.44[kN] |
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横弾性係数Tex14 |
8100 |
8100 |
8100 |
●部材算定 |
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トラス |
P=鉛直荷重=Q0+{Fh*hg+Fv*(L-Lg)/(α1*L)} |
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=1.44+{3.85*31.5+1.925*(60-30)}/(2*60)=2.93[kN] |
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補剛区間Tex10 |
100 |
200 |
60 |
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2 |
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長期/op6 |
FALSE |
FALSE |
FALSE |
横架材引張力 |
Ns=軸力=P/tan(θ)+Fh/α1 |
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4 |
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短期/op5 |
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TRUE |
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=2.93/tan(42.4)+3.85/2=5.13[kN] |
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長期/短期 |
短期 |
短期 |
短期 |
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モーメントtext11 |
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0 |
斜材圧縮力 |
Nc=軸力=P/{α1*sin(θ)} |
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モーメントtext12 |
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0 |
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=2.93/{2*sin(42.4}=4.35[kN] |
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モーメントtext13 |
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形鋼サイズ |
65x65x6 |
50x50x4 |
65x65x6 |
ここで、 |
Fh=Kh*W=1.5*3.3=3.85[kN] |
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形鋼 |
等辺L形鋼 |
等辺L形鋼 |
等辺L形鋼 |
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Kh=設計用水平震度=1.5 |
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1.5 |
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断面積 |
7.527 |
3.892 |
7.527 |
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hg=重心位置=31.5[cm] |
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31.5 |
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許容応力度 |
23.5 |
19.9 |
20.6 |
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L=横架材スパン=60[cm] |
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60 |
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ボルト穴 |
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1 |
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Lg=重心位置=30[cm] |
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30 |
TRUE |
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個数 |
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1 |
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H=架台高さ=55[cm] |
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55 |
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梁種類 |
1 |
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θ=斜材角度=42.4[°] |
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0 |
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断面係数 |
6.27 |
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184 |
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0 |
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●部材検定 |
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横架材 |
Ns/(A*ft)+M0/(Z*fb)=5.13/(7.527*23.5)+21.64/(6.27*23.5)=0.18
< 1 |
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TRUE |
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0.000579 |
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ここで、 |
鋼材=等辺L形鋼65x65x6 |
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ft=許容引張応力度=23.5[kN/cm2] |
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fb=許容曲げ応力度=23.5[kN/cm2] |
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A=断面積=7.527[cm2] |
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4 |
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2 |
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斜材 |
Fa=許容軸力=7.527*20.6 >
4.35[kN] |
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3.755 |
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1.91 |
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ここで、 |
鋼材=等辺L形鋼65x65x6 |
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0.77 |
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A=断面積=7.527[cm2] |
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ft=許容圧縮応力度=20.6[kN/cm2] |
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