箍筋計(jì)算
當(dāng)箍筋r=2.5d時(shí),135o鋼筋彎鉤內(nèi)皮差值=1.357×2.5d+1.178d=4.571d
抗震箍筋135o/135o,彎鉤末端直線長(zhǎng)度為10d或75mm
箍筋中心線長(zhǎng)=箍筋內(nèi)皮周長(zhǎng)+內(nèi)皮90o差值×3+135o內(nèi)皮差值×2+(10d或75)×2
=(截面外周長(zhǎng)-200)-0.287d×3+4.571d×2+(20d,150)
=(截面外周長(zhǎng)-200)+8.28d+(20d,150)
近似長(zhǎng)度=構(gòu)件截面周長(zhǎng)
筋:6ф25底筋
單根長(zhǎng)=ln1+lae+(hc-50+15d-2.93d)
=(6000-450)+38×25+(450-50)+15×25-2.93×25
=5550+950+400+375-73.25
=7201.75(mm)
小計(jì)長(zhǎng)=7.202m×6=43.21m
① 筋:4ф25底筋(短跨)
單根長(zhǎng)=ln2+lae+(hc-50+15d-2.93d)
=(4000-450)+38×25+(450-50)+15×25-2.93×25
=3550+950+400+375-73.25=5201.75(mm)
小計(jì)長(zhǎng)=5.202m×4=20.81m
② 筋:2ф25通長(zhǎng)筋
單根長(zhǎng)=6000+4000-225×2+(hc-50+15d-2.93d)×2
=9550+(450-50+375-73.25)×2
=10953.5mm
小計(jì)長(zhǎng)=10.953m×2=21.906m
③ 筋:2ф22直角筋
單根長(zhǎng)=1/3ln1+(hc-50)+15d-2.931d
=1/3×5550+(450-50)+15×22-2.931×22
=1850+400+330-64.48
=2515.52mm
小計(jì)長(zhǎng)=2.515m×2=5.03m
④ 筋:2ф25直角筋
單根長(zhǎng)=1/3ln2+(hc-50)+15d-2.931d
=1/3×3550+(450-50)+15×25-2.931×25
=1184+400+375-73.28
=1886mm
小計(jì)長(zhǎng)=1.886m×2=3.77m
⑤ 筋:中支座負(fù)筋2ф25(下排)
單根長(zhǎng)=1/4ln1×2+hc
=1/4×5550×2+450
=1388×2+450
=3225mm
小計(jì)長(zhǎng)=3.225m×2=6.45m
⑦筋:中支座負(fù)筋2ф25(上排)
單根長(zhǎng)=1/3ln1×2+hc
=1/3×5550×2+450
=1850×2+450
=4150mm
小計(jì)長(zhǎng)=4.15m×2=8.30m
⑧側(cè)邊構(gòu)造筋g4ф10:
小計(jì)長(zhǎng)=(構(gòu)件長(zhǎng)-保護(hù)層×2+彎鉤增加長(zhǎng)×2)×4
=(6000+4000+225×2-25×2+6.25×10×2)×4
=10525mm×4
=42.10m
⑨箍筋ф8:
加密區(qū)根數(shù)=[(2×650-50)÷100+1]×4
=14×4=56
非加密區(qū)根數(shù)=[(5550-1300×2)÷200-1]+[(3550-1300×2÷200-1)
=(15-1)+(5-1)=18
小計(jì)長(zhǎng)=[(300+650)×2+26]×(56+18)
=1926×74=142524mm=142.52m
鋼筋重量:
ф25:0.006165×252×(43.21+20.81+21.91+3.77+6.45+8.30)
=3.85×104.45=402.13kg
ф22:0.006165×222×5.03=2.98×5.03=14.99kg
ф10:0.006165×102×42.10=0.6165×42.10=25.95kg
ф8:0.006165×82×142.52=0.395×142.52=56.23kg
合計(jì)=499.30kg