Optimum design of steel structures with web openings

被引：55

作者：

Lagaros, Nikos D. ^{[1
]}

Psarras, Lemonis D. ^{[1
]}

Papadrakakis, Manolis ^{[1
]}

Panagiotou, Giannis ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Inst Struct Anal & Seism Res, Athens 15780, Greece

来源：

ENGINEERING STRUCTURES | 2008年 / 30卷 / 09期

关键词：

web openings; structural optimization; evolution strategies; steel structures;

D O I：

10.1016/j.engstruct.2008.02.002

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The objective of this work is to perform optimum design of 3D steel structures having perforated I-section beams. The optimization problem is formulated as a combined sizing, shape and topology optimization problem. The cross-sectional dimensions of the columns and beams constitute the sizing design variables, while the number and size of the web openings of the beams constitute the topology and shape design variables, respectively. Two distinctive formulations of the optimization problem are considered depending on the finite element discretization implemented for simulating the structural elements. The two formulations, corresponding to beam and shell discretization, are compared in terms of the optimum designs achieved. A characteristic test example considered, showed that a quantifiable reduction in the weight of the structure is accomplished by allowing web openings in the beams of the structure without reducing structural strength or serviceability requirements. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2528 / 2537

页数：10

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