ひび割れ幅照査計算機(GB 50010)

Member type
Force type
Concrete grade
Rebar grade
Exposure class
Stress input
断面幅 ミリメートル(mm)
断面高さ ミリメートル(mm)
保护层厚度 ミリメートル(mm)
鉄筋径 ミリメートル(mm)
鉄筋本数
Service moment Ms kN·m
计算裂缝宽度: - ミリメートル(mm)
Crack limit wlim: - ミリメートル(mm)
Limit utilization: -
Effective depth h0: - ミリメートル(mm)
Steel stress σs: - N/mm²
Tension steel As: - mm²
Effective tension Ate: - mm²
有效配筋率 ρte: -
不均匀系数 ψ: -
Force factor αcr: -
検証結果: -
Notes: -

Crack Width Calculator (GB 50010)

Estimate maximum crack width wmax per GB 50010 §7.1.2 for beams/slabs and compare with exposure-class limits.

  1. Choose member, force type (αcr), concrete/steel grades and exposure class
  2. Beam: b×h, cover, bar dia & count; slab: thickness, dia & spacing (b=1000 mm)
  3. Enter service moment Ms or σs directly
  • wmax = αcr·ψ·(σs/Es)·(1.9c + 0.08 deqte)
  • αcr: flexure 1.9 / axial tension 2.7 / eccentric compression 1.5

For learning and preliminary checks only—final design needs a licensed engineer. Runs locally in your browser.