An analysis of the mantle structure of the Safavid bridge span (Case Study: Thirty Bridges, Marnan, Khaju, Joey)

The purpose of this study was to investigate the correlation between the design of crater width, crater height and base widths of four poles, thirty three bridges, Khajou, Joey, and Marnan, constructed on the Zayandehrood River, and to explore the relationship between these variables underpins the theory that The form of these bridges is a direct function of their main function.In this study, due to the high volume of data, the research method is based on Python coding and working with artificial intelligence algorithms that, after harvesting the required data and performing various calculations of the files in CSV format, and then considering field harvesting, openings Four bridges were simulated in related software using the cosine relation of all openings and plots were plotted.The findings of this study suggest that there is a high similarity and a close relationship between the width and height of the craters on each bridge with that bridge itself and the three other bridges on the river, and the design of these bridges is less than a century old despite historical differences. , Fully functional and based on the technology of that era, the volume of water generated and the stability of the river.In conclusion, it should be noted that the longer the historical period of bridge construction, the greater the width of the bridges, and according to the diagrams of the drawings of each bridge, the design and construction accuracy is high, as well as the 75 openings in the 92 openings in these four bridges. With a similarity percentage of 70 to 90, it has the similarity of 33 bridges and very high bridges, and the lowest bridges and 33 bridges. The bridges are designed based on its performance and according to the standards of that era, construction technology.