A cost based approach to design of residential steel roof systems

Barzin Mobasher, S. Y. Chen, C. Young, Subramaniam Rajan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A comprehensive system for the design of residential steel roof truss systems is presented. The research involved three distinct stages. In the first stage, components of the truss systems were tested in order to determine their member properties subjected to axial force and bending moments. Finite element simulations of these tests were carried out to further verify the calculations obtained using the AISI-LRFD code guidelines. The AISI-LRFD code based design curves were used for the actual design, while the laboratory experiments and the finite element results provided additional checks and verification of the AISI values. The second stage of the research involved the development of an integrated design system that would automatically design a roof truss given minimal input and using the design curves as the performance constraints. A design optimization scheme based on the genetic algorithm was adopted to handle sizing, shape and topology variables in the design problem. A software system was developed to design the lowest cost truss given the input parameters. The third stage of the research involved full-scale testing of typical residential steel roofs designed using the developed software system. Roof trusses were loaded to failure. The full scale testing procedure established the factor of safety while validating the analysis and design procedures. Evaluation of the test results indicates that the present design system provides enough reserve strength for the structure to perform as predicted.

Original languageEnglish (US)
Title of host publicationInternational Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction
EditorsW.W. Yu, R.A. LaBoube
Pages613-625
Number of pages13
StatePublished - 1998
EventFourteenth International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction - St. Louis, MO, United States
Duration: Oct 15 1998Oct 16 1998

Other

OtherFourteenth International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction
CountryUnited States
CitySt. Louis, MO
Period10/15/9810/16/98

Fingerprint

Roofs
Steel
Costs
Trusses
Testing
Bending moments
Genetic algorithms
Topology

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Mobasher, B., Chen, S. Y., Young, C., & Rajan, S. (1998). A cost based approach to design of residential steel roof systems. In W. W. Yu, & R. A. LaBoube (Eds.), International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction (pp. 613-625)

A cost based approach to design of residential steel roof systems. / Mobasher, Barzin; Chen, S. Y.; Young, C.; Rajan, Subramaniam.

International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction. ed. / W.W. Yu; R.A. LaBoube. 1998. p. 613-625.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mobasher, B, Chen, SY, Young, C & Rajan, S 1998, A cost based approach to design of residential steel roof systems. in WW Yu & RA LaBoube (eds), International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction. pp. 613-625, Fourteenth International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction, St. Louis, MO, United States, 10/15/98.
Mobasher B, Chen SY, Young C, Rajan S. A cost based approach to design of residential steel roof systems. In Yu WW, LaBoube RA, editors, International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction. 1998. p. 613-625
Mobasher, Barzin ; Chen, S. Y. ; Young, C. ; Rajan, Subramaniam. / A cost based approach to design of residential steel roof systems. International Specialty Conference on Cold-Formed Steel Structures: Recent Research and Developments in Cold-Formed Steel Design and Construction. editor / W.W. Yu ; R.A. LaBoube. 1998. pp. 613-625
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