Abstract
This paper concerns the system reliability analysis of steel truss towers. Due to failures of towers, the assessment of their reliability seems to be a very important problem. In the analysis, two cases are examined: when the buckling coefficient is a deterministic value and when it is a random variable. The impact of failures of single elements on the structure reliability was investigated. Calculations of the standard deviation of the capacity and reliability indexes were made using author-developed programs in the Mathematica environment.
Highlights
Truss towers are multi-element, self-supporting structures, rigidly fixed to the base
A common cause of failures of towers with main legs made from closed sections is water freezing in them, which leads to the bursting of sections
Each kinematically admissible failure mechanisms (KAFMs) contains the minimal critical sets of elements (MCSE), which have a particular number of tshe causative elements (l)
Summary
Truss towers are multi-element, self-supporting structures, rigidly fixed to the base. Due to many factors such as large height, relatively low material consumption, and simple erection process, steel truss towers are the most obvious choice for a tower structure. With respect to their use, a number of types can be identified [1], namely, antenna towers, architectural towers, transmission towers, chimney towers, light towers, viewing towers, or water towers. A common cause of failures of towers with main legs made from closed sections is water freezing in them, which leads to the bursting of sections In such cases, the indirect cause lies in careless workmanship of welded connections, which allows water penetration into the section.
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