Imperial College London
Alternate

Professor M Ahmer Wadee

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Nonlinear Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 6050a.wadee Website

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

421Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wu:2019:10.1016/j.engstruct.2019.109723,
author = {Wu, K and Wadee, MA and Gardner, L},
doi = {10.1016/j.engstruct.2019.109723},
journal = {Engineering Structures},
title = {Stability and ultimate behaviour of prestressed stayed beam-columns},
url = {http://dx.doi.org/10.1016/j.engstruct.2019.109723},
volume = {201},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The instability of beam-columns with crossarms and externally prestressed cable stays is studied analytically, where the combination of bending and compression is assumed to be derived from the system self-weight acting orthogonally to the applied axial load. Three principal zones of behaviour are identified with two of these each having two sub-zones that relate the critical buckling load to the initial prestressing force applied to the stay cables. The ultimate load-carrying capacity of the beam-columns is evaluated by conducting nonlinear finite element analysis within the commercial package ABAQUS. Results show that the analytically derived critical buckling loads generally provide safe predictions of the ultimate loads due to significant post-buckling strength. It is found that releasing the geometric double symmetry of the system can make for a significantly more efficient structure due to the effect of pre-cambering against the self-weight. The strength and efficiency of stayed beam-column systems opens up a range of potential applications, including lighter alternatives to conventional props to support wide excavations, which currently utilize very heavy steelwork.
AU  - Wu,K
AU  - Wadee,MA
AU  - Gardner,L
DO  - 10.1016/j.engstruct.2019.109723
PY  - 2019///
SN  - 0141-0296
TI  - Stability and ultimate behaviour of prestressed stayed beam-columns
T2  - Engineering Structures
UR  - http://dx.doi.org/10.1016/j.engstruct.2019.109723
UR  - http://hdl.handle.net/10044/1/74305
VL  - 201
ER  -
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