Four triaxial accelerometers are placed on the table plate to measure the acceleration input. Twelve triaxial accelerometers are placed at different positions on the specimen, on the four outer angles of each level. Two more are placed at the center of each partition wall to assess the deflection of these walls during tests. The accelerometers used are PCB capacitive sensors with 10g or 20g range.

Local displacements are measured at the angles of each level and on some walls diagonals. At the base, between the table and the steel base of the specimen, LVDTs are used. They have a very low range to check the possible movements of the specimen base, such as uplifting. DCTH sensors with a 5 mm range are used for this purpose. At first and second level, The horizontal displacements at first and second levels will be measured with cable sensors. At first level, the sensors are be fixed on supports out of the specimen and the cables will be attached to the specimen. At second level, sensors are positionned on the specimen and the cables attached to external supports. For angles A1, C1 and C3 the supports are fixed on the table. The sensors measure only the displacements of the specimen without the global displacement of the table. On angle A3, there was not enough place to position a support on the table, so two supports are fixed outside the table. These sensors measure local displacements of the specimen additioned to the global displacement of the table.

Two types of cable sensors are used:

• FX-HM 15 with 375 mm range for first level;

• FGP 1850-020 with 500 mm range for second level and out of table sensors.

Some walls diagonals are equipped with cable sensors :

• Two external walls ;

• Two internal walls.

Cable sensors Firstmark 150 with a 38 mm range are used.

Strain gages are used to measure some rebars deformation. Twelve structural nodes are instrumented with 56 gages.

The gages on rebars are of 2 types :

• Kyowa KFGS -02-120-C1-11, with 3.3 mm long grid and 5% range (50 000 μstrain) ; • HBM 1-LY11-3/120, with 3 mm long grid and 5% range (50 000 μstrain). They are glued on the rebars and then covered with adhesive paste and aluminium foil to protect them from the concrete during cast. In addition, two gages are glued on the internal wall at first level to measure its deflection. They are concrete gages from Kyowa of KC-70-120-A11 type (67 mm long grid and 5% range). Gages have been wired with 20 meter long orange cables at base and part of first level slab. The others on first and second slabs have been wired with 50 cm long cables. These short ones have been extended by soldering 20 meter long orange cables. Some gages have been lost during casting :

• At level 1, JX_BC21_B2 JYA231_32, JZ_B21_1 ;

• At level 2, JY_A122_21. Gages at top of first level columns were intended to be placed 50 mm under low beam surface. But some of them have been misplaced :

• For two columns A2 and A3, they were actually in the beams, 20 mm above beam low surface;

• For column B2, gages were at 195 mm under beam surface.

6C sensors have been developed by the Geophysical Observatory of Munich. They measure the accelerations in 3 axis as well as the 3 rotations. They are synchronized by GNSS pulsed signal. There will be 14 scattered on the specimen, each one with its antenna.