INFLUENCE OF INTERACTION BETWEEN HOLLOW CONCRETE FILLED STEEL TUBES COMPONENTS TO THEIR STRENGTH

摘要

Many researches agreed about behavior of loaded Concrete Filled Steel Tube (CFST) element that in loading stage, when exist particular level of stresses, appear interaction between steel tube and concrete core and wherefore appear complex stress state of element, which increases strength of whole composite element. There are many methods how to predict ultimate load for CFST elements, a lot of tests were made, but for centrifugal CFST there are lack of information. In this article are analysed reasons of above mentioned complex stress state and behavior of centrifugal CFST element components in different states of compressed structural member. Centrifugation process, mechanism of CFST element behavior is detailed. Numerical experiment and analyses are described and compared with past researches and other scientists summarized and combined results are analysed.