狐白 狐 · baobod.com

Lab / Bridge Design

Arch Bridge Workbench

Concept-stage check based on Lecture 4 / Tutorial 4. Pick an arch type, choose a live-load case and watch how the load path differs.

View calculation reference →
StatusFAIL
NEd crown16,793 kN
Crown M42,412 kNm
GovernsCrown e/d
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Concept ARigid arch · Half UDL
Behaviour (rigid arch)Half UDL
N at crown16,793 kN= H total
N at springing21,412 kN√(H² + V²)
Arch crown M42,412 kNmaxial + asymm. live
Crown e/d1.40thrust line offset / rib depth

Asymmetric live load drives bending in the rigid rib. Axial-deformation contribution adds residual sagging unless pre-jacked.

H elastic (perm.)13,851 kN
H effective16,793 kN
V max13,284 kN
Abutment H16,793 kN
Concept overviewFAIL

Stiff arch rib resists both compression and asymmetric live-load bending. Deck is comparatively shallow.

Proportion checksCrown e/d
Rise/span
0.167 · PASS
Arch rib d/L
1/67 · PASS
Panel / deck d
12.5 · PASS
Crown e/d
1.40 · FAIL
Out-of-plane (L/rib spacing)
13.2 · PASS
Foundation
Competent ground · REVIEW
Loads & reactionsRoad LM1
w_perm (line)
114.0 kN/m
w_perm·1.35
153.9 kN/m
q_k·1.5
90.0 kN/m
H* total
17,901 kN
H eff total
16,793 kN
ΔH (axial)
1,108 kN