Imperial College London
Portrait Picture

ProfessorLeroyGardner

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Structural Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 6058leroy.gardner

 
 
//

Location

 

435Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Afshan:2019:10.1016/j.engstruct.2019.01.007,
author = {Afshan, S and Theofanous, M and Wang, J and Gkantou, M and Gardner, L},
doi = {10.1016/j.engstruct.2019.01.007},
journal = {Engineering Structures},
pages = {510--522},
title = {Testing, numerical simulation and design of prestressed high strength steel arched trusses},
url = {http://dx.doi.org/10.1016/j.engstruct.2019.01.007},
volume = {183},
year = {2019}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The structural behaviour of prestressed high strength steel arched trusses is studied in this paper through experimentation and numerical modelling. Four 11m span prestressed arched trusses fabricated from S460 hot finished square hollow section members were loaded vertically to failure. Three of the tested trusses were prestressed to different levels by means of a 7-wire strand cable housed within the bottom chord, while the fourth truss contained no cable and served as a control specimen. Each truss was loaded at five points coinciding with joint locations along its span, and the recorded load-deformation responses at each loading point are presented. Inclusion and prestressing of the cable was shown to delay yielding of the bottom chord and enhance the load carrying capacity of the trusses, which ultimately failed by either in-plane or out-of-plane buckling of the top chord. For the tested trusses, around 40% increases in structural resistance were achieved through the addition of the cable, though the self-weight was increased by only approximately 3%. In parallel with the experimental programme, a finite element model was developed and validated against the test results. Upon successful replication of the experimentally observed structural response of the trusses, parametric studies were conducted to investigate the effect of key parameters such as prestress level, material grade and the top chord cross-section on the overall structural response. Based on both the experimental and numerical results, design recommendations in the form of simple design checks to be performed for such systems are provided.
AU  - Afshan,S
AU  - Theofanous,M
AU  - Wang,J
AU  - Gkantou,M
AU  - Gardner,L
DO  - 10.1016/j.engstruct.2019.01.007
EP  - 522
PY  - 2019///
SN  - 0141-0296
SP  - 510
TI  - Testing, numerical simulation and design of prestressed high strength steel arched trusses
T2  - Engineering Structures
UR  - http://dx.doi.org/10.1016/j.engstruct.2019.01.007
UR  - http://hdl.handle.net/10044/1/66188
VL  - 183
ER  -
Download