Assessing the seismic vulnerability of masonry buildings - Seismic Risk Analysis and Management of Civil Infrastructure Systems - page 342

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0

0 0.01 0.02 0.03

Drift

0.04 0.05 0.06

Combined In-plane Out-of-plane

(a)

0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0 0

0.01 0.02 0.03

Drift

0.04 0.05 0.06

UFB3 UFB4 DS4 DS3 RS3

(b)

13.4 (a) average capacity curves for sample grouped by collapse
mechanism classes, and (b) average capacity curves for sample
grouped by structural typology (UFB stands for unreinforced fi red
brickwork, DS stands for dressed stone, RS for rubble stone. The
number refers to different type of binders and/or fl oor structure).

whether failure occurs by out-of-plane, in-plane or a combined mechanism
involving both series of walls. In Fig. 13.4, the capacity curves are obtained
by considering different structural typologies, as classifi ed by the WHE-
PAGER project (Jaiswal et al. , 2011). It can be seen that the correlation
between mode of failure and structural typology is qualitatively good but
not univocal, and the grouping affects both acceleration capacity and drift.