Seismic Performance of Masonry Walls Built with New Type of Fired Shale Hollow Blocks

Table 8

Secant stiffness at different characteristic states.

No.	Secant stiffness (kN/mm)
	Initial state	Crack state	Ultimate state
W1	33.64	18.43	9.47
W2	36.85	24.64	17.73
W3	38.96	26.08	8.69
W4	44.91	30.83	9.24
W5	58.34	39.38	19.32
W6	63.53	41.64	21.12