複合構造物連結部材の最適設計とボイラ耐震設計への適用 : 粘弾性受動型制振法による最適化

概要

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This paper deals with an optimum design method for connecting elements of adjacent structures which are excited by earthquakes. Considering the expansion of this study to an active or semiactive control of connecting elements, the structures are modeled by block diagram. In order to improve the efficiency of calculation, the substructure synthesis method is introduced. Time-domain optimization with inequality constraints is carried out using a nonlinear programming technique. A connecting element is modeled by a pair of a spring and a dashpot. Elasto-Plasticity is taken into account using the equivalent linearization method. These characteristics of connecting elements are optimized to minimize the seismic time-response of the structures, under the constraint for relative displacement between these structures. This method is applied to a fundamental lumped-mass model of a boiler plant structure which is composed of the boiler and its supporting structure. As an objective function, a total of the story shear force of the supporting structure is adopted. As a result of this investigation, the proposed optimization method has proven to be effective and practical for aseismic design of adjacent structures with connecting elements.
一般社団法人日本機械学会の論文
1993-02-25