The design of joints of concretefilled
steel tubular (CFST) columnreinforced concrete (RC)
beam with visibleconcealed twincorbel in the metro station excavated by cutandcover topdown
method in Hohhot, Inner Mongolia is of great significance. As a result, a new
type of CFST joint with visibleconcealed twincorbel is put forward, which is analyzed by simulation software
ABAQUS and model test. Meanwhile, analysis is made on the key design parameters
of the joint. The results show that: (1) The effective weld length between the
annular corbel rib plate and the steel pipe wall is the main parameter
affecting the shear resistance of the node, and by adjusting which the
mechanical properties of the joint can be significantly improved. (2) In order
to ensure the effective transfer of shear force, 8% of the diameter of steel
tube column should be taken as the appropriate value. (3) When the shear force
at the beam column joint is large, the visibleconcealed
twincorbel can be used, which has high bearing
capacity and excellent mechanical properties as well as a wide range of
engineering application prospects.
ZHANG Lin
,
WU Yun
. Investigation into Shearing Capacity of VisibleConcealed
Twincorbel Used in a Metro
Station Excavated by CutandCover
TopDown Method[J]. Tunnel Construction, 2020
, 40(9)
: 1285
-1291
.
DOI: 10.3973/j.issn.2096-4498.2020.09.006
