To investigate the seismic response of a prefabricated
metro station in different site conditions, a threedimensional
static and dynamicallycoupled nonlinear finite element
model of a prefabricated metro station is established based on finite element
software. Then, the seismic response of the fabricated metro station under
different site conditions, peak accelerations of seismic waves, and vertical
seismic waves is systematically analyzed. Finally, the acceleration,
deformation, stress, and plastic damage laws of the fabricated metro station
are obtained. The results demonstrate that: (1) The horizontal displacement
difference between top and bottom of the station structure and the opening
angles of the joint gradually increase as the site conditions change from
category Ⅱ to category Ⅲ, and
the growth rate gradually increases, but the opening angles of the joint are
maintained at a low level(less than 0.10°), verifying
the stability and safety of the joint. (2) The waist and shoulder of the top
arch and the envelope structure near the sidewall are prone to plastic damage
in site condition category Ⅲ. (3) Compared with singlehorizontal seismic waves, the deformation, stress, opening angles of
joint, and plastic damage of the fabricated metro station will be significantly
increased by increasing the horizontal seismic waves. Generally, under site
condition category Ⅱ and an input peak acceleration of
seismic waves of 0.1〖WT5《TNR#I》〗g〖WT５《TNR》〗 and 0.2〖WT５《TNR#I》〗g〖WT５《TNR》〗, the structure is basically in a flexible working state; whereas
under site condition category Ⅲ and an input peak
acceleration of a seismic wave of 0.4〖WT５《TNR#I》〗g〖WT５《TNR》〗, the prefabricated metro station is in
a plastic working state and the area of the plastic zone is large.
TAO Lianjin
,
CAO Qiankun
,
SHI Cheng
,
DING Peng
. Seismic Responses of Prefabricated Metro Stations
Built at Different Sites[J]. Tunnel Construction, 2022
, 42(3)
: 378
-387
.
DOI: 10.3973/j.issn.2096-4498.2022.03.005
