|Table of Contents|

Numerical Analysis on Shear Behavior of Shear Connector for Demountable Composite Beam(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年02期
Page:
117-126
Research Field:
Publishing date:

Info

Title:
Numerical Analysis on Shear Behavior of Shear Connector for Demountable Composite Beam
Author(s):
LUO Yun-biao1; 2;  QI Lian-xun1;  YAN Jia-bao1; 2;  LI Zhong-xian1; 2
1. School of Civil Engineering, Tianjin University, Tianjin 300350, China; 2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300350, China
Keywords:
demountable composite beam;  plug-type bolted shear connector;  numerical analysis;  shear behavior
PACS:
TU398.9
DOI:
10.19815/j.jace.2020.05036
Abstract:
In order to avoid the drawbacks of the solutions with conventional bolted shear connection, a novel plug-type bolted shear connector(PTBSC)was proposed for demountable composite beam. Nine static push-out specimens were designed with the parameters including the bolt diameter, the length of neckdown rod, the material and the size of plug, and the shear behavior of plug-type bolted shear connector was studied. Based on the prototype push-out specimen, ABAQUS finite element analysis model was established for numerical analysis, and it was verified by experiment. The results shows that the load-slip curves of the PTBSC exhibits obvious secondary stiffness as expected, and has good shear slip ductility. The failure mode is shear fracture occurred in the preset neckdown zone, meanwhile no significant damage is found on the precast concrete slab and the steel beam. The increasing of bolt diameter can significantly increase both the shear capacity and the shear stiffness of connector. The increasing of length of neckdown zone can improve the ductility of connector, but reduces the yielded shear capacity and shear stiffness, while has no obvious effect on the ultimate shear capacity. Compared with normal concrete and high strength mortar, the UHPC is the favorable material to make plugs to achieve better shear performances of the bolted connectors. The size of the plug has no obvious effect on the shear behavior of the PTBSC, but the space between neckdown zone and slab pocket should be ensured to accommodate the bolt deformation.

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Last Update: 2021-03-20