Main Article Content
THE ULTIMATE LIMIT STATE OF STABILITY BY EQUILIBRIUM BIFURCATION AND THE LIMIT STATES FOR AXIAL DEFORMATION RESULTING FROM THIS CONDITION WERE EVALUATED FOR AN EXTREMELY SLENDER REAL STRUCTURE OF REINFORCED CONCRETE, WITH GEOMETRY VARYING ALONG ITS LENGTH. THE ASPECTS RELATED TO NONLINEARITIES OF THE MATERIAL WERE CONSIDERED THROUGH THE RECOMMENDATIONS ON NBR 6118:2014, FROM THE BRAZILIAN ASSOCIATION OF TECHNICAL STANDARDS (ABNT). IN THE ANALYTICAL SOLUTION, DEVELOPED FOR STABILITY ANALYSIS, ALL ELEMENTS OF THE STRUCTURAL DYNAMICS PRESENT IN THE SYSTEM WERE TAKEN INTO ACCOUNT, INCLUDING THE COLUMN SELF-WEIGHT. THE CRITICAL BUCKLING LOAD WAS THEN DYNAMICALLY DEFINED TO DIFFERENT INSTANTS OF TIME. REDUCTIONS OF 70% FOR THE MODULUS OF ELASTICITY AND 59% FOR THE CRITICAL BUCKLING FORCE WERE FOUND IN ANALYSES PERFORMED FROM ZERO AND FIVE THOUSAND DAYS. IT WAS ALSO POSSIBLE TO OBTAIN THE INDUCED STRESSES ON THE HOMOGENIZED CROSS-SECTIONS AND THOSE TRANSFERRED TO REINFORCEMENT STEEL BARS.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY] that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).