Economic Design Optimization of Foundations
Economic Design Optimization of Foundations
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DOI：
10.1061/(asce)1090-0241(2008)134:8(1097
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发表时间：
2008-08
影响因子：
3.9
通讯作者：
Yu Wang;F. Kulhawy
中科院分区：
文献类型：
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作者：
Yu Wang;F. Kulhawy
岩土工程基础设计至少应满足三个基本要求：极限状态（ULS）、正常使用极限状态（SLS）和经济性。大多数传统的设计方法都集中在ULS和/或SLS优化上，然后进行经济性评估。作为一种替代方案，本文开发了一种设计方法，明确考虑建设经济和结果的基础，具有最低的建设成本。该设计方法表示为一个优化过程，其目标是最小化施工成本，设计参数和设计要求分别作为优化变量和约束。这种设计方法是用扩展基脚的例子来说明。由于建筑成本因地区而异，因此经济优化设计因地区而异。对土壤特性和设计要求的敏感性研究表明，对于无粘性土壤中的典型扩展式基础设计，杨氏模量（E）和有效的弹性模量（E）是最重要的。
A geotechnical foundation design should address at least three basic requirements: ultimate limit state (ULS), serviceability limit state (SLS), and economics. Most conventional design approaches focus on ULS and/or SLS optimization, with economics being evaluated afterwards. As an alternative, this paper develops a design approach that explicitly considers the construction economics and results in a foundation that has the minimum construction cost. This design approach is expressed as an optimization process, in which the objective is to minimize construction cost, with the design parameters and design requirements as the optimization variables and constraints, respectively. This design approach is illustrated using a spread footing example. Because construction costs vary by locale, the economically optimized designs differ regionally. Sensitivity studies on soil properties and design requirements show that, for typical spread footing designs in cohesionless soils, Young’s modulus (E) and the effective...