PSI - Issue 29

Michela Monaco et al. / Procedia Structural Integrity 29 (2020) 134–141 Michela Monaco et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Table 1. Mechanical characteristics of the statue-pedestal set.

Mechanical characteristics (Kg, m)

Weight

Centroid height

Base length

Base depth

R 1

R 2

Statue

650 100 200

0.635

0.72 0.80 0.80

0.43 0.60 0.60

0.648

0.736

Pedestal1 Pedestal2

0.10 0.20

- -

- -

The analyses have been performed considering a restitution coefficient equal to 0.80, a static friction coefficient equa l to 0.40anda kinematic oneequal to 0.30, in case of two pedestals with distinct heights (Table1).

[rad] 

[rad] 

Statue on the floor

10 x

Pedestal 1

[m]

Statue with pedestal 1

Statue

[sec] t

[sec] t

[rad] 

[rad] 

Statue on the floor

10 x

Pedestal 2

[m]

Statue with pedestal 2

Statue

[sec] t

[sec] t

Fig. 5. Rotation time histories for the statue with two distinct pedestals (red lines) and the statue freestanding on the floor (blue lines). Displacement time history for the pedestal only (gray lines). As it is shown in the above diagrams, in both cases thepresence of the pedestal the vulnerability of thestatue. For the base motion the followingmechanical parameters have been considered in a ll the analyses: ̈ ( ) = = 0.07 = 2.4 The amplitude oscilla tions of the statue directly placed on the floor are smaller with respect to those in case of pedestal. The dimensions of the rotationangle remain somewhat constant even in case of longlastingexcitation, and consideration about the suitable distance from the back wa ll can be done. As it can be seen, both the amplitude of rota tions of the statue and linear displacements of the pedestal prevent the insertion of this last element. 4. Conclusions The first set of analyses made to design a safe collocation for a Roman statue in the Paestum Archaeological Museumhavebeenpresented in this paper. Theset composedof anacephalous statueand its pedestal, to beplaced in the in the entranceof the Roman exhibit room has been considered as stacked rigid blocks have beenpresented in this paper. It has been shown that a suitable distance of the statue from the back wa ll can be determined to realize a safe placement of the artefact during an earthquake event. Following previous experimental tests recently performed by the authors on single rockingblock, futuredevelopments include experimental analyses on stackedblocks prototypes