Bridge Structural Integrity Verification

📘 Methodological Notice, Hypotheses & Help
1. Bridge Characteristics
Required for 1960/40/27
2. Convoy Characteristics (in kg and m)
Axle No. Mass (kg) Next axle spacing (m)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 — End of convoy —
Methodological Notice & Help

Principle: The calculation compares the maximum stresses (Moment and Shear) generated by a specific convoy crossing an isostatic span, against the load capacities defined by historical French construction regulations (1927 to 1971).

Hypotheses: The structure is considered as a simple beam on two supports. The calculation integrates dynamic magnification factors (impact) and transverse distribution according to the original regulatory requirements.

  • Foreign structures: You can use this tool for structures outside France by entering the span and comparing the resulting Moments ($M$) and Shear ($T$) with your own data.
  • Decay: This coefficient weights the resistant capacity (1.0: new condition, 0.5: degraded).
  • Convoy: Enter masses in kg. The spacing is the distance separating the current axle from the next one.