免费剪力计算器
计算梁或构件中的剪力分布，用于结构分析。
ft
lb/ft
Each Reaction
2,400 lbs
Max Shear Force2,400 lbs
总负荷4,800 lbs
Each Reaction vs Beam Span
公式
## Shear Force (Simply Supported Beam) **V_max = wL / 2** For a simply supported beam with uniform load, the maximum shear force occurs at the supports and equals half the total load. The shear force decreases linearly to zero at mid-span.
计算示例
16 ft beam with 300 lb/ft uniform load.
- 01Total load = 16 x 300 = 4,800 lbs
- 02Reaction at each support = 4800 / 2 = 2,400 lbs
- 03Max shear = 2,400 lbs (at each support)
常见问题
Where is shear force highest?
For a uniformly loaded simply supported beam, maximum shear occurs at the supports. For point loads, shear is highest between the load point and the nearest support.
Why does shear matter?
Shear failures cause the beam to split horizontally near the supports. Wood beams are particularly susceptible because wood is weak in horizontal shear along the grain.
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