عنوان مقاله [English]
Since, generally, in high population areas and large cities for maximum use of land, buildings are constructed without distances or with insufficient distance, thus, during severe earthquakes, due to unbalanced vibration of the structure Adjacent bodies (which do not have enough distance from one another) and without considering the effects of the soil, the impact phenomenon occurs. The most natural way to avoid impact is to provide sufficient distance between adjacent structures. In the present article, the proposed distance between the standard 2800 Iran between two adjacent structures is also evaluated for the impact of impact phenomena using time histories analysis of structural-soil-structural models. To this end, evaluation of seismic behavior of structures 3, 6, and 12 of 3rd and 5th craters on type I and III soils was performed and for analysis of 6 earthquake records with different earthquake hazard levels Has been used. These structures were modeled in the OpenSees software. Then, to obtain an optimum distance between the structures, the PSO algorithm was used, the code of this algorithm was written in MATLAB software and connected with the OpenSees software. After reaching the convergence condition, the optimum interval was presented and compared with the proposed interval in the standard 2800. The results indicate that the proposed distance in standard 2800 for high-risk earthquakes is not adequate and is not suitable and, given the soil conditions, structures and earthquakes, there is a possibility of collision.