Out of plane assessment of reinforced block walls with pilasters  

Hi,

I am assessing a 12 meter 20 series reinforced concrete block wall which has a return wall at each end and two reinforced 400x400mm² pilasters evenly located within the wall. 

I have assessed out-of-plane capacity of the wall as part and components, ignoring the pilasters and considered that the pilasters may act as a main structure elements to support the wall. The question is, the re are two options  for loading the pilasters as follows:

1) If the wall fails, then it would act as a cladding of the pilasters and as such the seismic load applying to the pilasters should down scale. 

2) The pilasters should assess under same condition as the walls with part and components seismic factor. In this case seismic load to pilasters are almost twice as option 1.

Note that walls are horizontally and vertically reinforced with D12@400 and pilasters have 2x3D20 with D10@100 stirrups. walls and pilasters are bonded together.

Any thoughts or ideas please share, thanks.