The fast connectors between
rings of shield tunnel segments has poor tolerance performance and limited
tensile strength. The address these issues, a fast connector between rings with
automatic error adaptation and high tensile strength is designed and developed.
The main mechanical properties such as tensile capacity, tensile stiffness, and
structural damage morphology of the connectors are obtained by conducting
tensile performance tests and numerical simulation analysis of the connectors,
validating the perfect tensile performance of the connectors with self-adaptive error function. This provides a research foundation for the
promotion and application of fast connectors. The results reveal the following:
(1) The maximum insertion force of the female connector is 66.02 kN, the
tensile bearing capacity is 521.49 kN, the overall longitudinal tensile stiffness is 1.72×107 N/m, and the tensile bearing capacity
and the longitudinal tensile stiffness of the male connector structure are
508.77 kN and 1.81×107 N/m,
respectively. (2) The damage of the connector during tensile test basically
occurs at the anchoring structure, and no obvious deformation damage occurs in
the main stressed structure.(3) Numerical simulation results demonstrate the form of tensile damage in the
main stressed structure of the connectors. The connecting rod shows a large
area of stress yielding; the internal structural stress in the connectors does
not reach the yield strength, and no partial yielding occurs, which shows that
the connecting rod is a weak part of the connectors. (4) The tensile simulation
results of male connectors under different sliding offsets reveals the
integrity of the overall tensile performance of the connectors under self-adaptive error conditions.
ZHAO Mingying
,
XIAO Mingqing
,
XUE Guangqiao
,
LIU Xuezeng
,
FU Jiahui
. Mechanical Properties of
Self-Adaptive Fast Connectors Between Rings of Shield Tunnel Segments[J]. Tunnel Construction, 2024
, 44(S2)
: 168
-178
.
DOI: 10.3973/j.issn.2096-4498.2024.S2.018
