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• Crack Width Calculation Spreadsheet
• Crack Width Calculation Spreadsheet Excel
• Crack Width Calculation Spreadsheet 2019
• Crack Width Calculation Xls
• Crack Width Calculation Spreadsheet Pdf
• Crack Width Calculation Spreadsheet Template

Crack Width Calculation Spreadsheet แจก Spreadsheets ที่รวบรวมมาให้เพื่อนๆสำหรับงานออกแบบโครงสร้าง งานก่อสร้าง งานวิศวกรรมโยธา ฯลฯ Updated: 8. RCC14 Crack Width.xls. Download Full PDF Package. Line 1 RC 05-Dec-2017 34 Crack Width Calculations to BS8110: 2005/ BS8007:1987. According to Eurocode 2, the crack width, wk, can be calculated from the following equation: wk = sr,max (εsm –εcm). Pineconez' second law: Assuming a techlevel more advanced than nearfuture (i.e. Interstellar -or- extremely cheap interplanetary travel exists), there will exist no true warship which will not ALSO be capable of single-handedly exterminating an entire continent, be it via nukes, kinetics or handwavium bombs.

Crack Width Calculation Spreadsheet

Crack Width Calculation Spreadsheet Excel

Maximum compressive stress in concrete

Maximum tensile stress in reinforcement

Crack width

Crack Width Calculation Spreadsheet 2019

Notation and methodology according to clause 7 of EC2

Stress calculation assuming cracked section

• Stress in the tension reinforcement
  σ_s1 = n·σ_c·(d-X)/X = 6.09·10.88·(25.9-4.64)/4.64 = 303.39 MPa
• Maximun reinforcement tensile stress
  σ_s1,max = k₃ · f_yk = 0.8 · 500 = 400 MPa
• Compressive stress in the most compressed concrete fibre
  σ_c = M_k · X / I_cr = 10.88 MPa
• Maximum compressive stress
  σ_c,max = k₁ · f_ck = 0.6 · 30 = 18 MPa

where

Crack Width Calculation Xls

• n= E_s / E_cm = 200 / 32.84 = 6.09
  E_cm = 22·[f_cm/10]^0.3 = 22·[38/10]^0.3 = 32.84 GPa
  f_cm = f_ck + 8 = 30 + 8 = 38 MPa
• d (effective depth) = h – c - Φ/2 = 30 – 3.5 – 1.2/2 = 25.9 cm
• X (Depth of the neutral fibre) = 4.64 cm
  with:
  • d′ = h - d = 30 - 25.9 = 4.1 cm
  • ρ₁ = A_s1 / (b·d) = 3.39 / (40·25.9) = 0.0033
  • ρ₂ = A_s2 / (b·d) = 2.36 / (40·25.9) = 0.0023
• I_cr (cracked inertia) = 10668.66 cm⁴
  I_cr = n·A_s1·(d-X)·(d-X/3) + n·A_s2·(X-d′)·(X/3-d′)
  I_cr = 6.09·3.39·(25.9-4.64)·(25.9-4.64/3) + 6.09·2.36·(4.64-4.1)·(4.64/3-4.1) = 10668.66 cm⁴

Calculation of crack width

w_k = s_r,msx·(ε_sm - ε_cm) = 322.5 · 0.00091 = 0.29 mm

where

ε_sm - ε_cm (difference between mean strains) = 0.00091
ε_sm - ε_cm = max(ε_m,1 ; ε_m,2) = max(0.0006 ; 0.00091)
with:

• ε_m,1 = [σ_s1 - k_t·(f_ct,eff/ρ_p,eff)·(1+α_e·ρ_p,eff)] / E_s
  ε_m,1 = [303.39 - 0.6·(2.9/0.01)·(1+6.09·0.01)] / 200000 = 0.0006
  
  • k_t = 0.6 (Long term loading)
  • f_ct,eff = f_ctm = 2.9 MPa
    f_ctm = 0,30 × f_ck^(2/3) = 0,30 × 30^(2/3) = 2.9 MPa
  • ρ_p,eff = A_s / A_c,eff = 3.39 / 338.1 = 0.01
    A_c,eff = b · h_c,ef = 40 · 8.45 = 338.1 cm²
    h_c,ef = min[2.5(h-d) ; (h-X)/3 ; h/2] = min[10.25 ; 8.45 ; 15] cm
  • α_e = E_s / E_cm = 6.09
• ε_m,2 = 0.6 · σ_s / E_s = 0.6 · 303.39 / 200000 = 0.00091

Crack Width Calculation Spreadsheet Pdf

s_r,msx (Maximum crack spacing) = 32.25 cm
(case spacing = 170 mm ≤ 5(c+Φ/2) = 205 mm)
s_r,msx = k₃·c + k₁·k₂·k₄·Φ/ρ_p,eff
s_r,msx = 3.4·35 + 0.8·0.5·0.425·12/0.01 = 322.46 mm
with:

Crack Width Calculation Spreadsheet Template

• k₁ = 0.8 (high bond bars)
• k₂ = 0.5 (bending)