| 目次へ 【梁形基礎_Bbタイプ】 |
|
|
|
|
|
|
|
設備耐震_梁形基礎_Bb |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ●基礎の浮き上がりの検討 |
|
|
|
|
|
|
|
|
|
|
| (1-Kv)[(Lg+(Lf-L)/2*W+Lf*Wf/2]>Kh[(hf+hg)*W+hf*Wf/2] |
|
|
|
|
|
|
|
| (1-0.3)[(20+(100-60)/2)*1.9+100*41E-01/2]=20E+01>0.6[(30+90)*1.9+30*4.1/2]=17E+01 |
|
2 |
|
|
| ●判定
OK |
|
|
|
|
|
|
|
|
| ここで、 |
L=設備機器の幅=60[cm] |
|
|
|
|
60 |
|
Lg=設備機器の重心位置=20[cm] |
|
|
|
|
20 |
|
hg=設備機器重心高さ=90[cm] |
|
|
|
|
90 |
|
Lf=基礎長さ=100[cm] |
|
|
|
|
|
100 |
|
hf=基礎高さ=30[cm] |
|
|
|
|
|
30 |
|
Bf=基礎幅=30cm] |
|
|
|
|
|
30 |
|
Kh=設計用水平震度=0.6 |
|
|
|
|
0.6 |
|
Kv=設計用鉛直震度=0.3 |
|
|
|
|
|
|
W=設備機器重量=1.9[kN] |
|
|
|
|
1.9 |
|
Wf=基礎重量 |
|
|
|
|
|
|
|
=hf*Lf*Bf*γ*z=30*100*30*23E-06*2=4.1[kN] |
|
|
|
|
|
γ=コンクリート比重量=23E-06[kN/cm3] |
|
|
|
23 |
|
z=基礎個数=2 |
|
|
|
|
|
2 |
|
|
|
|
|
|
|
|
|
| ●断面寸法の制限 |
|
|
|
|
|
|
|
| Bf=30≧20[cm] |
|
|
|
|
|
|
|
|
|
|
|
| hf/Bf=1≦2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ここで、 |
hf=基礎高さ=30[cm] |
|
|
|
|
|
|
|
|
|
15 |
|
Bf=基礎幅=30[cm] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
