Dynamic Instability in Shallow Arches under Transversal Forces and Plane Frames with Semirigid Connections

Figure 19

Velocities × time (central node) for different damping ratio (λ = 0.2): (a) nonchaotic responses; (b) chaotic response (=0.10); (c) detail at interval of 1.5s-2.5s (=0.10); (d) detail at interval of 4.3s-4.5s (=0.10).

(a)

(b)

(c)

(d)