A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm
Highlights If stressed-skin action is included, the cost of frames can be reduced by 42–53%. The wind load design cases were no longer critical. If the frame is designed on the basis of rigid joints, cladding failure could occur. It is important to take into account semi-rigidity and partial strength of joints. Failure of the roofing could be an issue when the frame is relatively flexible.
Abstract This paper describes a stressed-skin diaphragm approach to the optimal design of the internal frame of a cold-formed steel portal framing system, in conjunction with the effect of semi-rigid joints. Both ultimate and serviceability limit states are considered. Wind load combinations are included. The designs are optimized using a real-coded niching genetic algorithm, in which both discrete and continuous decision variables are processed. For a building with two internal frames, it is shown that the material cost of the internal frame can be reduced by as much as 53%, compared with a design that ignores stressed-skin action.
Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm
Highlights If stressed-skin action is included, the cost of frames can be reduced by 42–53%. The wind load design cases were no longer critical. If the frame is designed on the basis of rigid joints, cladding failure could occur. It is important to take into account semi-rigidity and partial strength of joints. Failure of the roofing could be an issue when the frame is relatively flexible.
Abstract This paper describes a stressed-skin diaphragm approach to the optimal design of the internal frame of a cold-formed steel portal framing system, in conjunction with the effect of semi-rigid joints. Both ultimate and serviceability limit states are considered. Wind load combinations are included. The designs are optimized using a real-coded niching genetic algorithm, in which both discrete and continuous decision variables are processed. For a building with two internal frames, it is shown that the material cost of the internal frame can be reduced by as much as 53%, compared with a design that ignores stressed-skin action.
Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm
Phan, Duoc T. (author) / Lim, James B.P. (author) / Tanyimboh, Tiku T. (author) / Wrzesien, A.M. (author) / Sha, Wei (author) / Lawson, R.M. (author)
Engineering Structures ; 93 ; 36-49
2015-02-27
14 pages
Article (Journal)
Electronic Resource
English
Optimal design of cold-formed steel portal frames for stressed-skin action using genetic algorithm
| Online Contents | 2015
Design approach of cold-formed steel portal frames
| Springer Verlag | 2011