Effect of different angles of rotation of bearing system with irregular application of non-parallel systems in concrete building with dual bearing system

In the present paper, the effect of rotation with different angles in the Structural bearing system was investigated by irregular non-parallel systems in the concrete structure with the dual design bearing system of the moment frame and the concrete shear wall. The structure was examined in two different modes, first without rotation in the bearing system and analyzed at an angle of zero degrees. Then, the bearing system was seismically analysed by rotating at angles of 15, 30, and 45 degrees to create irregularities in non-parallel systems. The results of structural behavior were performed by comparing the values of base shear, drift, and torsion effect in the structure. The results of the present study showed that the amount of drift and base shear of the structure in the state that has irregularity of non-parallel systems in the structure is more than the state of the structure without irregularity of the non-parallel system. Comparing the amount of base shear for the angels and other modes increases the amount of base shear by increasing the rotation angle of the bearing system, which increases the amount of rotation angle, imposes more force on the structure. The amount of base shear for the angle of 30 degrees of rotation of the Structural bearing system in the main direction of the building is more than other angles. The analysis results also showed that the non-parallelism of the central core of the structure reduces the lateral bearing capacity of the whole system. As a general conclusion, it can be stated that the higher the rotation angle of the bearing system, the higher the amount of displacement and drift, which is the most critical state for the 30-degree angle and the best performance in the structure for the zero degrees angle.