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Design of Civil Engineering Frame Structures Using a Monomial/Newton Hybrid Method

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  • Scott Burns
  • Keith Mueller

Abstract

This paper presents an application of a monomial approximation method for solving systems of nonlinear equations to the design of civil engineering frame structures. This is accomplished by solving a set of equations representing the state known as “fully-stressed design”, where each member of the structure is stressed to the maximum safe allowable level under at least one of the loading conditions acting on it. The monomial approximation method is based on the process of condensation, which has its origin in geometric programming theory. A monomial/Newton hybrid method is presented which permits some of the design variables to be free in sign, while others are strictly positive. This hybrid method is well suited to the structural design application since some variables are naturally positive and others are naturally free. The proposed method is compared to the most commonly used fully-stressed design method in practice. The hybrid method is shown to find solutions that the conventional method cannot find, while doing so with less computational effort. The impact of this approach on the activity of structural design is discussed. Copyright Kluwer Academic Publishers 2001

Suggested Citation

  • Scott Burns & Keith Mueller, 2001. "Design of Civil Engineering Frame Structures Using a Monomial/Newton Hybrid Method," Annals of Operations Research, Springer, vol. 105(1), pages 21-35, July.
    • Handle: RePEc:spr:annopr:v:105:y:2001:i:1:p:21-35:10.1023/a:1013393213240
    DOI: 10.1023/A:1013393213240
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