Multi-Span Self-Weight Bridge
Three-span bridge (8 + 2 + 4 m) with member self-weights and two 120 N live loads; an internal hinge at the first span junction provides the extra equation — shows that self-weight must be modelled as UDL in section cuts, not as lumped point loads.
Category: beam · Difficulty: Intermediate
Solution
| Support | Rx (N) | Ry (N) | Mz (N·m) |
|---|---|---|---|
| A | 0 | 180 | 0 |
| C | 0 | 440 | 0 |
| D | 0 | 20 | 0 |
All reaction values are computed by the StatIQ structural engine, not generated text. Signs follow the solver's convention: a positive Ry acts upward, a negative Ry downward; a positive M is counter-clockwise.