Three pipe roof-prefabricated structural members with varying configurations of
transverse reinforcement bars are designed to conduct laboratory loading tests
under three levels of eccentricity. The investigation focuses on the failure
modes, load-deflection relationships, and ultimate
bearing capacities of these members. Subsequently, finite element models that
replicate the tests are developed to validate the reliability of these models
by comparing the computational results with the experimental outcomes. This
comparison elucidates the influence of the diameter and placement of the
transverse reinforcement on the ultimate bearing capacity. The findings reveal:
(1) Transverse reinforcement connectors, when arranged in eccentric compression
members of pipe roof prefabricated structures, significantly enhance the stress
distribution within the steel pipe curtain and improve the integration of steel
plates with concrete, thereby augmenting both the load-bearing
and deformation capacities of the members. (2) The ultimate bearing capacity of
the structure escalates with an increase in the diameter of the transverse
reinforcement. (3) Although the placement of the transverse reinforcement has a
minimal impact on the strength and stiffness of the structure, the optimal
bearing capacity is achieved when the reinforcement is positioned at the
largest span of the variable section under conditions of minor eccentric
compression and at the junction between the variable and flat sections under
conditions of significant eccentric compression.
SONG Yuxiang
,
ZHENG Yongxiang
,
ZHANG Yanqing
,
XU Boning
,
LIU Yong
.
Effects of Transverse Reinforcement on Mechanical Performance of Eccentric Compression Members in Pipe Roof Prefabricated Structures
[J]. Tunnel Construction, 2024
, 44(6)
: 1174
-1183
.
DOI: 10.3973/j.issn.2096-4498.2024.06.005
