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:2021:10.1016/j.engstruct.2020.111344,
author = {Wu, K and Wadee, MA and Gardner, L},
doi = {10.1016/j.engstruct.2020.111344},
journal = {Engineering Structures},
title = {Prestressed stayed beam-columns: sensitivity to prestressing levels, pre-cambering and imperfections},
url = {http://dx.doi.org/10.1016/j.engstruct.2020.111344},
volume = {226},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The behaviour and structural performance of imperfect beam-columns with crossarms and externally prestressed cable stays are studied numerically, where the combination of bending and compression is assumed to be derived from the system self-weight acting orthogonally to the applied axial load. Both doubly-symmetric and mono-symmetric systems are studied. Sensitivity of the structural response to varying prestressing levels, pre-cambering and initial imperfections is investigated. Different initial imperfection levels and combinations are considered to facilitate the exploration of interactive buckling. The optimum prestressing force in terms of ultimate resistance and two structural efficiency indicators is also studied. It is found that relatively small crossarm lengths, stay diameters and crossarm length ratios should be avoided. Moreover, mono-symmetric cases are more sensitive to the level of pre-cambering than their doubly-symmetric counterparts. Considering both load-carrying capacity and structural efficiency, doubly-symmetric cases perform best with zero pre-cambering, but mono-symmetric cases perform best with upward pre-cambering. As for the true optimum prestressing levels, these are recommended to be significantly above the linearly obtained optimum to maximize the structural efficiency.
AU  - Wu,K
AU  - Wadee,MA
AU  - Gardner,L
DO  - 10.1016/j.engstruct.2020.111344
PY  - 2021///
SN  - 0141-0296
TI  - Prestressed stayed beam-columns: sensitivity to prestressing levels, pre-cambering and imperfections
T2  - Engineering Structures
UR  - http://dx.doi.org/10.1016/j.engstruct.2020.111344
UR  - http://hdl.handle.net/10044/1/83504
VL  - 226
ER  -
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