assessment of nonlinear dynamic response of diagrid structures exposed to variation of incidence angle of pulse type ground motions

In recent years, diagrid structures have received increasing attention for aesthetically pleasing and structurally efficient system. as is common in these structures, the diagrid frames form the perimeter of the building (adeli & asadi, 2017; sadeghi & rofoii, 2018). in this research, three 20-story diagrid structures which have different façade pattern were selected and designed. three skeletal configurations with diagonal angle of approximately 56o, 64o, 76o respect tohorizontal axis have been considered. furthermore, another bundled tube structure with the same sizes and skeletal configuration was also designed as the basic model for analytical comparison purposes subjected to near-field earthquakes. the façade pattern of the studied models with various criterion angles are shown in figure 1. all of these four studied models are loaded and designed according to the iranian seismic code 2800 and the iranian national building code (issues 6 and 10).