Comparative analysis of ways to protect bridge structures from external influences

Due to the fact that modern bridge construction sets itself the task of building new bridge structures in seismically active areas where earthquakes or other external impacts are permanent, there is an urgent question of protecting the structure from these impacts. This article is devoted to the analysis of ways to protect the bridge structure from external influences. The author analyzes these methods on the basis of publicly available data from companies engaged in the production of structures that prevent external influences, as well as on the basis of modern regulatory documents. The article presents such methods of protection as: deformation seams, support parts, dampers of various modifications and vibration dampers of shrouds. To choose the optimal method, both from the economic side and from the technical side, it is necessary to make verification calculations for static, dynamic and seismic effects, study the geological characteristics of the construction site, conduct mandatory tests of the structures used, as well as use regulatory documents and guidelines for testing and using seismic isolation devices. Also, the author of the article emphasizes that it is important to study ways to protect bridge structures not only in domestic practice, but also in foreign practice.