Explicit Finite Element Formulations for the Free Vibrations and Buckling of Partial-Interaction Composite Beams with Two Sub-components

The variational principles and corresponding finite element formulations are developed in this work for the free vibration and buckling analysis of partial-interaction composite beams under complex engineering situations, such as axial loading conditions, non-uniform material distributions, multi-sp...

Full description

Saved in:
Bibliographic Details
Published in:International journal of steel structures 2023, 23(4), , pp.1119-1134
Main Authors: Lin, Jian-ping, Chen, Bowen, Liu, Xingxi, Xu, Rongqiao, Wang, Guannan
Format: Article
Language:English
Subjects:
Axial loads
Boundary conditions
Box girders
Buckling
Civil Engineering
Composite beams
Composite structures
Contact stresses
Engineering
Free vibration
Interlayers
Materials Science
Shear
Solid Mechanics
Variational principles
Vibration analysis
토목공학
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The variational principles and corresponding finite element formulations are developed in this work for the free vibration and buckling analysis of partial-interaction composite beams under complex engineering situations, such as axial loading conditions, non-uniform material distributions, multi-span boundaries. The composites structures consist of sub-components connected with shear connections of finite rigidities and thus suffer from the partial-interaction phenomenon, significantly affecting the structural performance. The macroscopic elements for dynamic and buckling behavior are explicitly derived by simultaneously considering the sub-elements’ deformations and interlayer slips, avoiding the stress concentrations in the contact areas existing in the commercial packages. The generated frequencies and critical loads of several orders for the single- or two-span composite structures with different boundary conditions are then validated against the analytical and numerical results in the literature with well-matched agreement. The interfacial shear connections and structural parameters are also studied of their influences on the structural dynamic and buckling behavior. The present theory is finally implemented in the theoretical analysis of the steel box-girder viaduct with non-uniformly-distributed shear braces and multi-span continuous composite beams of Jiubao Bridge. The explicit expressions of the elements are provided and can be readily implemented into the commercial software with high computational efficiency.
ISSN:1598-2351
2093-6311
DOI:10.1007/s13296-023-00754-y