Table 4: Load-deflection response parameters of slabs at cracking and steel bar’s yielding strengths.

Retrofit Configuration HPFRCC Strip
Type
Cracking Initial Stiffness, Ki (kN/mm) Increase in Ki (%) Yielding
Pcr (kN) Δcr (mm) Py (kN) Δy (mm)
Control No.1 - 36 1.48 24.36 - 73 8.26
Control No.2 - 33 1.50 21.86 -10.3 107 13.78
Type D 2-way NSM 50 1.54 32.47 33.3 (48.5)1 86 7.83
Type E 2-way EBR 43 1.52 28.29 16.1 (29.4)1 71 7.01
Type F 1-way NSM +
1-way Precast
86 1.47 58.50 140.2 (167.6)1 103 5.67

1. Values in respect to control slab No.2 in parenthesis.

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