第1个回答 2019-03-15
1
双向板:B-1
1.1
基本资料
1.1.1
工程名称:工程一
1.1.2
边界条件(左端/下端/右端/上端):
固端
/
固端
/
固端
/
固端
1.1.3
荷载标准值
1.1.3.1
永久荷载标准值
楼板自重:
gk1
=
0.12*25
=
3.00kN/m?
均布荷载:
gk2
=
1.5kN/m?
1.1.3.2
可变荷载标准值
均布荷载:
qk1
=
2kN/m?
γQ
=
1.4
ψc
=
0.7
ψq
=
0.4
1.1.4
计算跨度
Lx
=
4000mm
计算跨度
Ly
=
6000mm
板厚
h
=
120mm
(h
=
Lx
/
33)
板底、板面纵筋合力点至近边距离:as
=
25mm、as'
=
25mm
1.1.5
混凝土强度等级:C25
fc
=
11.94N/mm?
ft
=
1.27N/mm?
ftk
=
1.78N/mm?
Ec
=
27871N/mm?
1.1.6
钢筋抗拉强度设计值
fy
=
210N/mm?
Es
=
210000N/mm?
1.2
弯矩计算结果
1.2.1
平行于
Lx
方向的跨中弯矩
Mx
Mx
=
Max{Mx(L),
Mx(D)}
=
Max{4.69,
4.59}
=
4.69kN·m
Mxk
=
3.71kN·m
Mxq
=
3.03kN·m
Asx
=
240mm?
ρ
=
0.25%
ρmin
=
0.27%
Asx*
=
327mm?
φ8@150
(As
=
335)
1.2.2
平行于
Ly
方向的跨中弯矩
My
My
=
Max{My(L),
My(D)}
=
Max{2.21,
2.16}
=
2.21kN·m
Myk
=
1.75kN·m
Myq
=
1.43kN·m
Asy
=
125mm?
ρ
=
0.15%
ρmin
=
0.27%
Asy*
=
327mm?
φ8@150
(As
=
335)
1.2.3
沿
Lx
方向的支座弯矩
Mx'
Mx'
=
Max{Mx'(L),
Mx'(D)}
=
Max{-9.91,
-9.71}
=
-9.91kN·m
Mx'k
=
-7.86kN·m
Mx'q
=
-6.41kN·m
Asx'
=
522mm?
ρ
=
0.55%
φ10@140
(As
=
561)
1.2.4
沿
Ly
方向的支座弯矩
My'
My'
=
Max{My'(L),
My'(D)}
=
Max{-7.48,
-7.33}
=
-7.48kN·m
My'k
=
-5.93kN·m
My'q
=
-4.84kN·m
Asy'
=
389mm?
ρ
=
0.41%
φ10@200
(As
=
393)
1.3
跨中挠度验算
挠度
f
=
6.6mm
f
/
Lx
=
1/605
由计算知,底筋双向φ8@150,支座筋φ10@140