发布于:2010-07-07 17:27:07
来自:建筑结构/水池水塔烟囱设计
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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 = 9000mm,计算跨度 Ly = 5700mm,板的厚度 h = 500mm (h = Ly / 11)
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
1.1.9 裂缝宽度验算时执行的规范: 《给水排水工程构筑物结构设计规范》(GB 50069-2002)
1.2 配筋计算
1.2.1 平行于 Lx 方向的跨中弯矩 Mx
Mxk = 31.24kN·m,Mxq = 30.58kN·m;
Mx = Max{Mx(L), Mx(D)} = Max{37.71, 41.77} = 41.77kN·m
Asx = 308mm,as = 44mm,ξ = 0.014,ρ = 0.07%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.060mm
1.2.2 平行于 Lx 方向自由边的跨中中点弯矩 M0x
M0xk = 41.25kN·m,M0xq = 40.38kN·m;
M0x = Max{M0x(L), M0x(D)} = Max{49.78, 55.15} = 55.15kN·m
As0x = 407mm,as = 44mm,ξ = 0.019,ρ = 0.09%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.079mm
1.2.3 平行于 Ly 方向的跨中弯矩 My
Myk = 29.24kN·m,Myq = 28.63kN·m;
My = Max{My(L), My(D)} = Max{35.29, 39.1} = 39.10kN·m
Asy = 298mm,as = 60mm,ξ = 0.014,ρ = 0.07%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.062mm
1.2.4 沿 Lx 方向的支座弯矩 Mx'
Mx'k = -81.57kN·m,Mx'q = -79.85kN·m;
Mx' = Max{Mx'(L), Mx'(D)} = Max{-98.45, -109.06} = -109.06kN·m
Asx' = 812mm,as' = 44mm,ξ = 0.037,ρ = 0.18%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.156mm
1.2.5 平行于 Lx 方向自由边上固定端的支座弯矩 Mxz'
Mxz'k = -47.71kN·m,Mxz'q = -46.70kN·m;
Mxz' = Max{Mxz'(L), Mxz'(D)} = Max{-57.59, -63.79} = -63.79kN·m
Asxz' = 471mm,as' = 44mm,ξ = 0.022,ρ = 0.10%; ρmin = 0.21%,
As,min = 1075mm; 实配纵筋: Φ12@100 (As = 1131); ωmax = 0.091mm
1.2.6 沿 Ly 方向的支座弯矩 My'
My'k = -119.58kN·m,My'q = -117.06kN·m;
My' = Max{My'(L), My'(D)} = Max{-144.34, -159.88} = -159.88kN·m
Asy' = 1202mm,as' = 44mm,ξ = 0.055,ρ = 0.26%;
实配纵筋: Φ14@125 (As = 1232); ωmax = 0.222mm
1.3 跨中挠度验算: 挠度 f = 0.6mm,f / Ly = 1/9,506
1.4 X 向自由边挠度验算: 挠度 fOx = 4.9mm,fOx / Lx = 1/1,829
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