发布于:2010-07-07 17:30:07
来自:建筑结构/混凝土结构
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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 / 自由
1.1.3 荷载标准值
1.1.3.1 永久荷载标准值
三角形荷载: gk1 = 55kN/m
1.1.3.2 可变荷载标准值
三角形荷载: qk1 = 2kN/m,γQ = 1.4,ψc = 0.7,ψq = 0.4
1.1.4 荷载的基本组合值
1.1.4.1 板面 Q = Max{Q(L), Q(D)} = Max{68.8, 76.21} = 76.21kN/m
1.1.5 计算跨度 Lx = 4500mm,计算跨度 Ly = 5700mm,板的厚度 h = 500mm (h = Lx / 9)
1.1.6 混凝土强度等级为 C30, fc = 14.331N/mm, ft = 1.433N/mm, ftk = 2.006N/mm
1.1.7 钢筋抗拉强度设计值 fy = 300N/mm, Es = 200000N/mm
1.1.8 纵筋合力点至截面近边的距离: 板底 as = 44mm、板面 as' = 44mm
1.2 配筋计算
1.2.1 平行于 Lx 方向的跨中弯矩 Mx
Mxk = 19.08kN·m,Mxq = 18.68kN·m;
Mx = Max{Mx(L), Mx(D)} = Max{23.03, 25.52} = 25.52kN·m
Asx = 187mm,as = 44mm,ξ = 0.009,ρ = 0.04%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.015mm
1.2.2 平行于 Lx 方向自由边的跨中中点弯矩 M0x
M0xk = 8.93kN·m,M0xq = 8.74kN·m;
M0x = Max{M0x(L), M0x(D)} = Max{10.77, 11.93} = 11.93kN·m
As0x = 87mm,as = 44mm,ξ = 0.004,ρ = 0.02%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.007mm
1.2.3 平行于 Ly 方向的跨中弯矩 My
Myk = 10.08kN·m,Myq = 9.87kN·m;
My = Max{My(L), My(D)} = Max{12.17, 13.48} = 13.48kN·m
Asy = 102mm,as = 60mm,ξ = 0.005,ρ = 0.02%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.010mm
1.2.4 沿 Lx 方向的支座弯矩 Mx'
Mx'k = -41.01kN·m,Mx'q = -40.15kN·m;
Mx' = Max{Mx'(L), Mx'(D)} = Max{-49.51, -54.84} = -54.84kN·m
Asx' = 405mm,as' = 44mm,ξ = 0.019,ρ = 0.09%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.032mm
1.2.5 平行于 Lx 方向自由边上固定端的支座弯矩 Mxz'
Mxz'k = -1.96kN·m,Mxz'q = -1.92kN·m;
Mxz' = Max{Mxz'(L), Mxz'(D)} = Max{-2.37, -2.62} = -2.62kN·m
Asxz' = 19mm,as' = 44mm,ξ = 0.001,ρ = 0.00%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.002mm
1.2.6 沿 Ly 方向的支座弯矩 My'
My'k = -45.40kN·m,My'q = -44.44kN·m;
My' = Max{My'(L), My'(D)} = Max{-54.8, -60.7} = -60.70kN·m
Asy' = 448mm,as' = 44mm,ξ = 0.021,ρ = 0.10%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.036mm
1.3 跨中挠度验算: 挠度 f = 0.5mm,f / Lx = 1/8,550
1.4 X 向自由边挠度验算: 挠度 fOx = 0.6mm,fOx / Lx = 1/7,454
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