楼梯配筋自动计算,自动生成计算书(下载后方可使用)
25f t =
f tk =HRB 400
f y =B =mm b 1=mm H =mm h 1=mm n =8步
a =rad
L p =mm B b =mm
l 0=mm
mm 1)
91.4mm
110mm 110mm
2)
q=p=
3)M =4)
15h 0=91mm
a 1=1
a s =z =A s =mm 2
d 8@
A s =
mm 2
%
0.2%
r
≥5)
a.g k =
q k =
3.5b.s s =8mm r te =r te =y =
a cr = 1.9
20mm
mm
0.3mm
≤c.0.5
d.e.f.a E =
g f '=
B s =
g.q =2
r s '=
B =
h.f =mm [f ]=
mm
f
≤
楼梯编号:
梯板编号:
TB2
基本信息 1)材料:
混凝土:C 1.27楼梯计算书
工程名称:下载后方可使用,自动计算楼梯1.78钢筋:3602)几何信息:19602801300
162.50.525851650
200
B +L p +B b =
2810
1.05l n=
1.05(L p +B )=
2740.5楼梯计算跨度l 0=
Min(l 0,1.05l n )=
楼梯板计算:
梯板厚度确定:l 0/30=l 0/25=取板厚h =荷载计算:恒载:
踏步重:
0.5h 1×25/1000= 2.03125kN/m 2斜板重:25h /cos a /1000= 3.179568996kN/m 2面层重:24×0.05(b 1+h 1)/b 1=
1.896428571kN/m 2板底抹灰:20×0.02/cos a =
0.462482763kN/m 2合计:g=
7.56973033
kN/m 2
活载:
3.5kN/m 2
设计线荷载:(1m 宽板带) 1.2g+1.4q=13.9836764kN/m
内力计算:跨中弯矩:0.1p l 02=
10.502217kNm
截面承载力计算:(保护层厚度c =
mm )
h -c -d /2=
M /(a 1f c bh 02
)=0.1065741-(1-2a s )0.5=0.1129532
a 1f c z bh 0/f y =339.76952选用:
100502.654816实配筋率r =
0.457[r ]min =Max(45f t /f y ,0.2)=
[r ]min
配筋率满足要求
裂缝验算及挠度计算:
荷载效应准永久组合下:
7.570kN/m kN/m M q =
(g k +ψq k )l 02
/10=
7.00kN.m
最大裂缝宽度计算:
M k /(0.87h 0A s )=175.89N/mm 2d eq =d /n =(A s +A p )/A te =A s /(0.5bh )=
0.00913918
<0.01,取0.01
1.1-0.65f tk /(r te s sk )=0.4421894
保护层厚度cs<20mm,取cs=w max =a cr ys s (1.9c +0.08d eq /r te )/E s =7.54E-02
[w max ]=
w max
[w max ]
裂缝满足要求荷载效应:
活载准永久系数:y q =
M gk =
g k l 02/10= 5.69kN.m M qk =
q k l 02/10=
2.63kN.m
标准组合下的弯矩:
M k =7.00
kN.m
准永久组合下的弯矩:M q =M gk +y q M qk =7.00kN.m
短期刚度B s 计算:
E s /E c =7.14E+00
E s A s h 02
/[1.15y +0.2+6a E r /(1+3.5g f ')]=
9.21E+11
Nmm 2
长期刚度B 计算:
M k B s /[M q (q -1)+M k ]= 4.6027E+11
Nmm 2
挠度计算:
5M k l 02/(48B )=11.897035l 0/200=13.7025[f ]
挠度满足要求