Set-Based Design for Lean Delivery of Reinforced Concrete Structures

钢筋混凝土结构精益交付的基于集的设计

• 批准号: 0511044
• 负责人: Iris Tommelein
• 金额: $ 32.55万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0511044&HistoricalAwards=false
• 关键词: Set; Based; Design; Lean; Delivery

Abstract for CMS 0511044Research will be conducted to integrate and enhance the processes for design, fabrication, and installation of steel rebar in order to achieve systemic improvements. Today's rebar industry is highly fragmented. The current delivery process for rebar is predominantly sequential, employs a time-consuming and ineffective submittal process, under-rewards participants, discourages innovation and promotes local sub-optimization. To reveal the opportunities for process improvement, constructability is viewed holistically. A design is better if it can be constructed more safely, with less risk of defects, in less time and at less cost; at a higher lever, however- and the way it is viewed in this research - the constructability of a design is a function of the optimum work structuring strategy for the project. A promising and new approach to design rebar, following lean construction principles, will be investigated. The research includes (1) definition and development of a new methodology and meta-language to represent data about design and component attributes, do that this data can be carried forward through all phases of rebar delivery; (2) formulation of design rules to reflect the knowledge, skills, and ability of a specialists to work together to assure superior quality of reinforced concrete structures while taking into account the specific circumstances of the project they are jointly working on; (3) articulation and testing of modeling tools including set-based and visualization to enable teams to explore design alternatives with target characteristics in a systematic and efficient way and choose solutions that meet many if not all of their constraints and preferences, and (4) development of process- and organizational understanding of how to engage multi-disciplinary teams of specialists in concurrent engineering in order to generate a design that is of greater value than today's point-based design are. Adoption of this new approach may steer the industry towards restructuring so as to boost its global competitiveness.Numerous specialists are involved in the delivery of capital projects made of reinforced concrete. Specialization has evolved to reflect the advanced technological understanding and capabilities that we exploit today to build structures to meet increasingly stringent owner and societal requirements. The need to specialize, however, has gone hand-in-hand with fragmentation of the industry resulting in a far-from-optimal delivery process. This research focuses on the steel that is used as reinforcing bar in concrete (rebar) and studies the relationships between those who design it and those who make it. The goal is to develop new theory and illustrate its application practice, in order to increase the capabilities, performance, and competitiveness of this sector of the steel industry. A promising and new approach to design rebar, following lean construction principles, will be investigated. These principles build on teamwork, exploration of sets of alternatives and postponement of commitments until sufficient data is available for the team to make an informed decision. Adoption of this new approach may steer the industry towards restructuring so as to boost its global competitiveness.

摘要CMS 0511044将对钢筋的设计、制造和安装过程进行整合和改进，以实现系统改进。如今的螺纹钢行业高度分散。目前螺纹钢的交付过程主要是顺序的，采用了一个耗时且无效的提交过程，对参与者的奖励不足，阻碍了创新，并促进了局部的次优化。为了揭示过程改进的机会，要从整体上看待可构造性。如果设计能够更安全、更少的缺陷风险、更短的时间和更低的成本，那么它就是更好的设计；然而，在更高的层面上——以及在本研究中看待它的方式——设计的可构造性是项目最佳工作结构策略的功能。一个有前途的和新的方法来设计钢筋，遵循精益施工原则，将进行研究。研究包括(1)定义和开发一种新的方法和元语言来表示有关设计和部件属性的数据，使这些数据可以在螺纹钢交付的各个阶段进行；(2)制定设计规则，以反映专家的知识、技能和能力，在考虑到他们共同从事的工程的具体情况下，共同努力，确保钢筋混凝土结构的优质；(3)建模工具的表达和测试，包括基于集合和可视化，使团队能够以系统和有效的方式探索具有目标特征的设计备选方案，并选择满足许多（如果不是全部的话）约束和偏好的解决方案；(4)发展过程和组织的理解，了解如何在并行工程中吸引多学科的专家团队，以产生比当今基于点的设计更有价值的设计。采用这种新方法可能会引导该行业进行重组，从而提高其全球竞争力。许多专家都参与了钢筋混凝土基建项目的交付。专业化已经演变为反映先进的技术理解和能力，我们今天开发的结构，以满足日益严格的业主和社会的要求。然而，专业化的需求与行业的碎片化相伴而来，导致交付过程远非最佳。本研究的重点是在混凝土（钢筋）中用作钢筋的钢材，并研究设计人员和制造人员之间的关系。目标是发展新的理论并说明其应用实践，以提高钢铁行业这一部门的能力、绩效和竞争力。一个有前途的和新的方法来设计钢筋，遵循精益施工原则，将进行研究。这些原则建立在团队合作、探索一系列替代方案和推迟承诺的基础上，直到有足够的数据供团队做出明智的决定。采用这种新方法可能会引导该行业进行重组，从而提高其全球竞争力。