Analysis of trusses2D
Zero-force members
Use joints, sections, geometric rules, rank checks, and moving-load envelopes for determinate trusses.
Open the complete lessonInteractive engineering simulation
Zero-Force-Member Detector
Apply the two inspection rules before revealing the solver classification.
Rigid-body statics
explore task
Inspect unloaded joints first. Look for two non-collinear members or three members with two collinear.Detected zero-force members
BD
At unloaded joint B, BD is non-collinear with the other two members and is zero-force.
Max joint residual
0.00e+0
Assumption
Pinned, axial-only
Diagrams are schematic equilibrium models. Member lines do not show elastic deformation, buckling, connection flexibility, or second-order effects.
Model scope and verification
Use the displayed units and idealizations, then verify the governing balance or compatibility equation before interpreting the result.