Technical evaluation of steel roof trusses for a large pool basin

Abstract

In this work, we carry out a technical evaluation of steel roof trusses for a large basin of the Del’fin pool in the city of Ust-Ilimsk with the purpose of determining their further operability. This task involves establishing the damage degree of building structures and the category of their technical condition based on a comparison between the actual values of quantifiable attributes and those established by the project or regulatory documents. The studied objects are represented by steel trusses with a span of 15 m, located in plan with a spacing of 6.0 m and conditionally divided into 2 groups: reinforcement trusses (F-1 and F-4) and existing trusses without reinforcement (F-2 and F-3). We analyze the technical, as-built, and operational documentation, and carry out visual and measuring control procedures. The verification calculation of the most loaded truss elements is presented (not provided in the article). According to the analysis of the obtained data, the condition of the studied steel trusses can be concluded as unacceptable and emergency. The emergency technical condition of the F-2 and F-3 trusses is due to the unprovided bearing capacity of support brace struts and insufficient length of welds, fastening the support brace struts. The unacceptable technical condition of the reinforcement trusses F-1 and F-4 is due to the insufficient length of the welds, fastening the support brace struts, as well as the deviations in a number of technical solutions, outlined in the reinforcement project, from the current norms. Recommendations on the further operability of roof structures are provided.