ABSTRACT
AIJ (1997).
4.2.2 Confinement of Concrete
Some typical longitudinal stress versus strain curves of the concrete core in CFST
sections are plotted in Figure 4.2(a) for CHS and in Figure 4.2(b) for SHS, where [
is the constraining factor defined in Eq. (3.32). It is clear that more confinement is
achieved for CFST sections with a larger constraining factor. It is also obvious that
more confinement is found in CFST CHS sections than that in CFST SHS sections.
This explains why an increased concrete strength is normally considered in
designing CFST CHS members.
