For the blind prediction competition, two types of information is sought:

  • Description of the model used for the prediction;
  • Prediction of the values to be reported for each of the twelve runs outlined in Table 5 (also incomplete sets, e.g. only for the runs at 100%, can be submitted).
1.1        Description of the model used for the prediction

The following information on the model is sought:

  • General description of the model;
  • Description of how the interface between the units was modelled;
  • Description of the applied damping model and the damping values used;
  • Description of the floor model and the connection between floor and walls
  • Description of the how the wall-to-wall connections within each unit were modelled;
  • Any specific property of the model which could be of interest.

Forms for the description of the model and observed values are provided for download.

1.2        Quantities to be reported for the blind prediction competition

The time histories and maximum values of the following 12 quantities are to be reported for each of the 12 runs in the provided Excel file (for each run one sheet + one sheet for maximum values):

  • Selected roof node displacements (6 quantities: Rd1-Rd6); (see Figure 3);
  • Interface opening between the units (4 quantities: Id1-Id4); (see Figure 3);
  • Base shear (2 quantities, in x- and y-direction).

For the roof node displacements and the base shear, the axis system and its sign convention shown in Figure 3 should be used. The interface opening should be computed as displacement of Unit 2 – displacement of Unit 1. A positive value for Id1 and Id3 should therefore represent an opening of the interface in y-direction. A positive value for Id2 and Id4 should represent the situation where the x-displacement of Unit 2 (at the interface) is larger than the x-displacement of Unit 1. The interface opening will be measured at the roof level of Unit 1, i.e., 2.2 m above the foundation.

Additionally, after each of the four levels of shaking in the adjoined form the participants should describe the expected damage with regard to the in-plane and out-of-plane damage to elements and any damage to the interface between the two units. It is suggested that the expected damage pattern is reported by sketching the damage pattern on the provided sketches of the façades.

Figure 3. Quantities to be reported