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独立柱基计算书

2023-08-02 来源:汇智旅游网
独立柱基计算书

项目名称_____________日期______ 设 计 者_____________ 校 对 者_____________

一、基础类型及计算形式

平面:

剖面:

基础类型:锥型柱基 计算形式:验算截面尺寸 已知尺寸: B1 = 600(mm), W1 = 1050(mm) H1 = 450(mm), H2 = 0(mm) B = 460(mm), H = 540(mm) 无偏心: B2 = 600(mm), W2 = 1050(mm)

二、几何数据及材料特性

混凝土: C25

钢筋: 二级(d<=25)

三、荷载数据

竖向荷载F = 83.00kN 自重土重G = 68.04kN Mx = 45.00kN*m My = 0.00kN*m

四、地基承载力设计值

计算公式:《建筑地基基础设计规范》(GB50007-2002)

f = fak + ηb*γ*(b-3) + ηd*γm*(d-0.5) (式5.2.4) 式中:fak = 240.00 kPa ηb = 0.30,ηd = 1.60 γ = 18.00 kN/m3 γm = 18.00 kN/m3 b = 2.10 m, d = 1.50 m 如果 b < 3m,按 b = 3m, 如果 b > 6m,按 b = 6m 如果 d < 0.5m,按 d = 0.5m f = fak + ηb*γ*(b-3) + ηd*γm*(d-0.5) = 240.00 + 0.30*18.00*( 3.00-3.00) + 1.60*18.00*( 1.50-0.50) = 268.80 kPa

地基承载力设计值 f = 268.80 kPa

五、轴心荷载作用下地基承载力验算

p = (F+G)/A 其中:A = 2.10 * 1.20 = 2.52 m2 p = ( 83.00 + 68.04 ) / 2.52 = 59.94 kPa ≤f,, 满足要求 计算公式: pmax=(F+G)/A+M/W pmin=(F+G)/A-M/W Y方向(b方向): Mx = 45.00kN*m 偏心矩ey = Mx/(F+G) = 45.00/(83.00 + 68.04) = 0.30 m≤ b/6 = 2.10/6 = 0.35 m 偏心矩ey, 满足要求 基础底面抵抗矩 Wy = a * b * b / 6 = 1.20 * 2.10 * 2.10 / 6 = 0.88m3 PmaxY = ( 83.00 + 68.04 ) / 2.52 + 45.00 / 0.88 = 110.96 kPa ≤ 1.2 * f = 1.2 * 268.80 = 322.56 kPa,, 满足要求 PminY = ( 83.00 + 68.04 ) / 2.52 - 45.00 / 0.88 = 8.92 kPa ≥ 0, 满足要求。

六、柱与基础交接处基础抗冲切验算

计算公式: 按《混凝土结构设计规范》(GBJ10-89)下列公式验算: Fl ≤ 0.6 * ft * bm * h0 (4.4.3-1) Fl = ps * A (4.4.3-2) bm = (bt + bb)/2 (4.4.3-3) X方向(a方向): Ps = F/A + My/Wx

= 83.00 / 2.52 + 0.00 / 0.50 = 32.94 kPa Ax = 0.00 m2 Flx = ps * Ax = 32.94 * 0.00 = 0.00 kN bb = Min{bc+2*ho,b} = Min{ 0.54 + 2 * 0.41 , 2.10} = 1.35 m bmx = (bt+bb)/2 = ( 0.54 + 1.35 )/2 = 0.95 m Flx ≤0.6 * ft * bmx * ho = 0.6 * 1300.00 * 0.95 * 0.41 = 298.53 kN, 满足要求 Y方向(b方向): Ps = F/A + Mx/Wy = 83.00 / 2.52 + 45.00 / 0.88 = 83.96 kPa Ay = 0.45 m2 Fly = ps * Ay = 83.96 * 0.45 = 37.68 kN bb = Min{ac+2*ho,a} = Min{ 0.46 + 2 * 0.41 , 1.20} = 1.20 m bmy = (bt+bb)/2 = ( 0.46 + 1.20 )/2 = 0.83 m Fly ≤0.6 * ft * bmy * ho = 0.6 * 1300.00 * 0.83 * 0.41 = 262.20 kN, 满足要求

七、抗弯计算

Y方向(b方向): 弯矩:Mx = 45.00 kN*m 可选方案: #12@200 采用方案:#12@200 实配面积:565.49 mm2

计算面积:139.03 mm2

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