Shape optimization of concrete buried arches

被引：24
作者：
Houst, Vladimir [1 ]
Elias, Jan [2 ]
Mica, Lumir [3 ]
机构：
[1] Brno Univ Technol, Inst Concrete & Masonry Struct, Brno 60200, Czech Republic
[2] Brno Univ Technol, Inst Struct Mech, Brno 60200, Czech Republic
[3] Brno Univ Technol, Inst Geotech, Brno 60200, Czech Republic
来源：
ENGINEERING STRUCTURES | 2013年 / 48卷
关键词：
Soil-structure interactions; Concrete arch; Cut-and-cover structure; Shape optimization; Genetic algorithm; Bezier curve; DESIGN;
D O I：
10.1016/j.engstruct.2012.11.037
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Shape optimization in connection with numerical modelling is used to reduce bending and associated flexural stresses in buried concrete arches. Modelling of the arch is carried out via a nonlinear finite element model that accounts for soil constitutive relations, soil-structure interactions, sequential construction stages and soil compaction. Centre line of the arch is parameterized by Bezier curve with three degrees of freedom that are subjected to optimization by genetic and Levenberg-Marquardt algorithm. The paper presents a parametric study which aims to determine the optimal shapes for buried arches of various span/rise ratios, backfill depths and foundation soil types. In the second part if the paper it shows a theoretical reduction in tensile stresses obtained by shape optimization of concrete arch culvert with a 9.4 m span tested at the University of Massachusetts at Amherst. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：716 / 726
页数：11
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