[Retracted] Study on Seismic Performance of Recycled Steel Fibers Locally Reinforced Cruciform Concrete Frame Beam-Column Joint

Figure 13

Stiffness degradation curves of specimens. (a) SJ-1. (b) SJ-2. (c) SJ-3. (d) SJ-4. (e) SJ-5.

(a)

(b)

(c)

(d)

(e)