The
relationship between prefabricated metro station structure type and grouted
mortisetenon joint performance is investigated by comparing and analyzing
the internal force and deformation of four metro station structure types, i.e.,
pure hinged joint structure, variable stiffness joint structure, rigid joint
structure, and castinplace
structure. Furthermore, a comparative analysis is conducted on the influence of
higharch and flatarch
structures on the joints′ bearing performance based on
the structural scheme selection of a Shenzhen prefabricated metro station. The
results show the following. (1) The nonrigid grouted mortisetenon joint with variable stiffness and good deformation capacity
has a noticeable amplitude modulation effect on the prefabricated component′s bending moment. (2) The safety margins of a higharch structure′s joints AB and BC are larger
than that of a flatarch structure, and the top arch joint′s safety
margin is weaker than that of flatarch structure
joints. Considering that all joints are in the linear stage and the safety
margin is enough, the flatarch structure is selected
according to the comprehensive consideration of transportation and investment.
(3) Each joint′s bearing capacity of the flatarch structure is evaluated using the joint bearing characteristic
curve. The results prove that the joints meet the requirements, and there is
still a large safety margin.
LIN Fang
,
PENG Zhiyong
. Influence of Different Structure Types of
Prefabricated Metro Station on Mechanical Properties of Grouted
MortiseTenon Joint〖[J]. Tunnel Construction, 2022
, 42(3)
: 420
-429
.
DOI: 10.3973/j.issn.2096-4498.2022.03.010
