钢筋混凝土柱基础设计

1 d= 2 m2 1000X1000

C203 N= 1847.40 kN

777.43

113.39 kN4 d+h= 3.00 m

5 300 kPa6 50 mm

0 018 kN/m3 20 kN/m3

1.1 N/mm2 fc= 10 N/mm2

210 N/mm2

310 N/mm2

a= 1000 mm b= 1000 mm h=

600 mm 600 mm

500 mm 500 mm

400 mm 400 mmL= 4000 mm B= 4000 mm

A= L * B = 16

10.667

V * h + M= 113.4 + 777.4= 890.8 kN.m

f= B - 3 ) + d - 0.5 )= 300.0 + 0 + 0= 300.0 kPa < 1.1fk= 330 kPa

330.0 kPa

条件: 地面以下: 柱脚:

混凝土:荷载:

MX= kN.M

VX=基础埋深:

地基承载力标准值:fk=基底保护层:

有关参数: h1= h2= g1= g2=

ft=

一级钢筋 fy=

二级钢筋 fy=

基础设计:

a1= b1= h1=

a2= b2= h2=

a3= b3= h3=

m2

Wx= L * B2 / 6 = m3

Mx=

fk + h1 * g1 ( h2 * g2 (

则： f=

G= (d +h) = 960.00 kN

e= 317 mm < B / 6 = 667 B - 3( B/2 - e ) 0 mm < B / 4 = 1000

Ps= (N+G) / A = 175.46 kPa < f= 330

(N+G) / A + Mx / Wx = 258.98 kPa < 1.2 f =

(N+G) / A - Mx / Wx = 91.95 kPa

350 mm

(b1 - H01) * [b1 + H01 +(a+2a2+2a3)]

= 0.9375

242.8 kN

2250 mm

163 mm < OK!

650 mm

[(b1+b2) - H02] * [(b1+b2) + H02 +(a+2a3) ]

= 1.5975

413.7 kN

2050 mm

306 mm < OK!

950 mm

[(b1+b2+b3) - H03] * [(b1+b2+b3) + H03 +a ] = 1.8975

491.4 kN

1950 mm

382 mm < OK!

V= 246.45 kN980 kN

V< OK!

X: 233.92 kPa

213.04 kPa

196.34 kPa

*= 186.45 * 0.360 * 1.800= 120.82 kN.m

*= 176.01 * 1.210 * 1.633= 347.86 kN.m

*= 167.66 * 2.250 * 1.500

基底压力验算:g2 * A *

Mx / ( N +G ) =且:

Psmax=

Psmin=

冲切验算:H01= h01=

AL1=

m2

FL1= Psmax * AL1 =

am1= a + a2 + a3 + H01 =

FL1 / ( 0.6 ft * am1 ) = H01

H02= h01 + h2=

AL2=

m2

FL2= Psmax * AL2 =

am2= a + a3 + H02 =

FL2 / ( 0.6 ft * am2 ) = H02

H03= h0=

AL3=

m2

FL2= Psmax * AL3 =

am3= a + h03 =

FL3 / ( 0.6 ft * am3 ) = H03

剪切验算:(Pnmax+Ps1)*(b1-h01)*b/2=0.07fcbh01=0.07fcbh01

板底配筋: Ps1=

Ps2=

Ps3=

M1-1= [( Psmax + Ps1 - 2G/A ) / 2] * b12 (3L - 2a1) / 6

M2-2= [( Psmax + Ps2 - 2G/A ) / 2] * (b1+b2)2 [3L - 2(a1+a2)] / 6

M3-3= [( Psmax + Ps3 - 2G/A ) / 2] * (b1+b2+b3)2 [3L - 2(a1+a2+a3)] / 6

= 565.85 kN.m

1826 1237

2832 1918

3151 2135

= 788 534

= 565

As1-1= M1-1 / ( 0.9h01 * fy ) = mm2 (一级钢筋) or

As2-2= M2-2 / ( 0.9h02 * fy ) = mm2

As3-3= M3-3 / ( 0.9h03 * fy ) = mm2

Asmax mm2/m

As实际 mm2/m 二级钢筋 12@200

1000 mm

400 mm

300 mm

300 mm

mmmm

OK!kPa

396 kPa

OK!

(3L - 2a1) / 6

[3L - 2(a1+a2)] / 6

[3L - 2(a1+a2+a3)] / 6

mm2 (二级钢筋)

mm2

mm2

mm2/m