Table 1.

Main characteristics of test specimen: length $L$, steel rebar diameter $\Phi$, r.c. tie diameter ${\Phi }_c$, number of electrical strain gauges on the naked bar $N_1$ and on the embedded bar $N_2$, number of LVDT-A $N_{\mathrm{LVDT}-\mathrm{A}}$, and of LVDT-B $N_{\mathrm{LVDT}-\mathrm{B}}$.

N.	L (mm)	Φ1 (mm)	Φc (mm)	N 1	N 2	N LVDT-A	N LVDT-B
1	1000	16	132	4	40	4	4
2	235	16	132	1	9	4	2
3	235	16	132	1	9	4	2
4	235	16	132	1	9	4	2
5	1000	20	132	4	40	4	2
6	1000	20	132	4	40	4	-

¹ Notional diameter of the ribbed bar.