Collaborative Research: Development of Innovative, Replaceable Coupling Beam Systems for Damage Mitigation in Coupled Walls

合作研究：开发创新的、可更换的连梁系统，以减轻连墙的损坏

• 批准号: 0958455
• 负责人: Bahram Shahrooz
• 金额: --
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-15 至 2012-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0958455&HistoricalAwards=false
• 关键词: Collaborative; Research; Development; Innovative; Replaceable

Coupled walls (CWs) are complex yet attractive lateral force resisting systems that combine extraordinary lateral stiffness with architectural practicality. Despite being an increasingly common system for high rise structures, research on coupled walls is lagging significantly behind that on other structural systems, and the relatively scant body of knowledge for coupled walls cannot adequately address their complex behavior. This research will involve a multi-institutional group of researchers, educators, and practitioners who will synergistically collaborate to build on new and promising innovations for formulating the next generation of earthquake resistant, damage-tolerant coupling beams. The resulting system will balance lateral stiffness, ductility, and superior energy dissipation characteristics; will have replaceable energy dissipating components to reduce the level of damage that is predictable yet repairable with minimal intrusion; will be more architecturally and structurally versatile than current systems; and will exhibit the best overall seismic performance through the use of innovative structural systems designed using performance-based design (PBD) methodologies incorporating sound performance objectives. A closely integrated experimental program and model-based simulations will be used to accomplish these goals. Comprehensive simulations in conjunction with component and substructure testing of sixteen approximately 3/4-scale specimens will generate the fundamental data for development and evaluation of a number of innovative details, and will permit in situ assessment of post-event reparability of coupled walls with innovative coupling beam systems. Hybrid testing of two additional 3/4-scale substructures, using a comprehensive analytical engine, will further examine the performance and post-event reparability of damage-tolerant, replaceable coupling beams subjected to realistic loading histories and boundary conditions. Moreover, hybrid testing will allow an in-depth evaluation of higher mode effects, wall pier-coupling beam interaction, and outrigger action of out-of-plane members as well as other 3-D effectsThe successful project will have immediate and widespread tangible impact on the earthquake engineering community that continues to face major challenges with design of cost effective coupled walls with desirable performance characteristics. The research deliverables will result in more structurally and economically efficient designs and will mitigate post-event damage through the use of innovative energy dissipating coupling beams developed based on PBD methodologies. The multi-faceted dissemination, education, and outreach plan will allow practitioners, researchers, and policy makers to expand and implement the research results for adoption of innovative, damage-tolerant structural systems. The research team has a strong background in design and analysis of coupled walls, development of innovative systems for coupled walls, advanced computational and modeling techniques, testing of complex structural systems, innovative educational and outreach programs, and advancement of state-of-practice through dissemination of research embodied in building codes. Innovative energy dissipating systems combined with PBD concepts will become effective and rational strategies to reduce earthquake impacts on coupled walls. The experimental data, models, simulation tools, methodologies, and systems developed and made available as part of this research will produce new knowledge and advance the state-of-the-art and practice in earthquake engineering, increasing the competitiveness of U.S. firms in the global economy. Additionally, the research deliverables will be broadly applicable to a variety of structural systems, pave the way for additional innovations in damage tolerant structural systems, and serve as a steppingstone for future projects and the development of new concepts for high-rise structures. The research will not only help today's practitioners to more effectively deal with seismic hazard mitigation for a large class of structures but will also educate the next generation of engineers who will work in a rapidly changing technological world where traditional curricula will not be sufficient. This research also impacts training and development of underrepresented groups through outreach activities and involvement of students from inner city high schools.

联肢墙是一种复杂而有吸引力的抗侧力体系，它将联合收割机非凡的抗侧刚度与建筑实用性相结合。尽管联肢墙是高层结构中越来越常见的体系，但对联肢墙的研究却明显滞后于其他结构体系，而且联肢墙的知识相对较少，无法充分解决其复杂的行为。这项研究将涉及一个由研究人员、教育工作者和从业人员组成的多机构小组，他们将协同合作，以新的和有前途的创新为基础，制定下一代抗震、耐损伤的连梁。所得到的系统将平衡横向刚度、延展性和上级能量耗散特性;将具有可替换的能量耗散部件以降低损坏水平，该损坏水平是可预测的，但可在最小侵入的情况下进行修复;将在建筑和结构上比当前系统更通用;通过采用基于性能的设计（PBD）的创新结构系统，包含健全绩效目标的方法。 一个紧密结合的实验计划和基于模型的模拟将用于实现这些目标。综合模拟结合16个约3/4比例试样的组件和子结构测试，将生成用于开发和评估一些创新细节的基础数据，并将允许现场评估具有创新连梁系统的耦合墙的事后可修复性。另外两个3/4比例的子结构的混合测试，使用一个全面的分析引擎，将进一步检查的性能和事后修复的损伤容限，可更换的耦合梁受到现实的负载历史和边界条件。此外，混合测试将允许更高的模式的影响，墙墩连梁的相互作用，并伸出面的成员，以及其他3-D的影响，成功的项目将有直接和广泛的实际影响地震工程界继续面临的主要挑战与成本效益的耦合墙设计所需的性能特点。研究成果将产生更结构和经济高效的设计，并将通过使用基于PBD方法开发的创新耗能连梁来减轻事后损害。多方面的传播，教育和推广计划将使从业人员，研究人员和政策制定者能够扩展和实施研究成果，以采用创新的，容损的结构系统。研究团队在耦合墙的设计和分析，耦合墙创新系统的开发，先进的计算和建模技术，复杂结构系统的测试，创新的教育和推广计划以及通过传播建筑规范中体现的研究来推进实践状态方面具有很强的背景。 结合PBD概念的新型消能体系将成为减少地震对连肢墙影响的有效和合理的策略。作为本研究的一部分，开发和提供的实验数据，模型，模拟工具，方法和系统将产生新的知识，并推进地震工程的最新技术和实践，提高美国公司在全球经济中的竞争力。此外，研究成果将广泛适用于各种结构系统，为损伤容限结构系统的其他创新铺平道路，并作为未来项目和高层结构新概念开发的垫脚石。这项研究不仅将帮助今天的从业者更有效地处理一个大类结构的地震灾害缓解，但也将教育下一代工程师谁将在一个快速变化的技术世界，传统的课程将是不够的。这项研究还通过外展活动和内城高中学生的参与来影响代表性不足群体的培训和发展。