Comparative Analysis of Limit Bearing Capacity of a Continuous Beam Depending on the Character of the Load

Abstract

Determination of the bearing capacity of a structure, as well as the assessment related tothe structure failure is very valuable, not only as a simple control of beam bearing capacity,but also as a significant basis and factor in designing of structures. When the structure isexposed to the action of a proportionally increasing load, by applying the limit analysis it ispossible to determine the limit failure load which is one of the bearing capacity indicators. Inthe case when beam systems are exposed to repeated load, the limit theorems do not yield the adequate solutions, thus the adaptation theorems which made safe limit load determination possible were developed simultaneously. Applying the limit and shakedown analysis, the analysis of bearing capacity of a continuous beam with two spans was conducted in the paper.Also displayed is the difference between the values of failure forces depending on the character of load and the beam span value in order to assess justification for application of the shakedown method in the analysis of the limit bearing capacity of the beams.