Why do cracks appear at the joint of brick wall and shear wall?

Cracks at the joint of brick wall and shear wall mainly exist in the following points:

1. Masonry walls and concrete walls are made of different materials.

2. The construction time of masonry wall and concrete wall is different. Due to the influence of atmospheric temperature and humidity, the deformation amplitude of expansion and contraction is not synchronous, the size is inconsistent, and cracks appear in differential performance. The Rachel measures specified in the specification can be reduced, but it may not guarantee that 100% is crack-free.