Experimental Research on Longitudinal Steel Bar Bond Properties in Modified Recycled Aggregate Concrete Beam-Column Interior Joint under Cyclic Loading

Figure 4

Damaged state of specimens in joints core area.

(a) ZJ1 in initial crack stage

(b) ZJ1 in full crack stage

(c) ZJ1 in ultimate stage

(d) ZJ1 in failure stage

(e) ZJ2 in initial crack stage

(f) ZJ2 in full crack stage

(g) ZJ2 in ultimate stage

(h) ZJ2 in failure stage

(i) ZJ3 in initial crack stage

(j) ZJ3 in full crack stage

(k) ZJ3 in ultimate stage

(l) ZJ3 in failure stage