NEESR-SG: International Hybrid Simulation of Tomorrow's Braced Frame Systems

该奖项是NSF 06-504项目征集“小乔治·E·布朗地震工程模拟研究网络(NEESR)”竞赛的结果。智能优点：支撑框架系统提供了一个有吸引力的解决方案，以满足基于性能的地震工程(PBEE)框架内的多个设计标准。如果详细说明，它们的位移和能量耗散能力可以满足极端事件造成的严重要求。然而，研究结果表明，目前的设计方法阻碍了传统支撑和屈曲约束支撑框架的潜力的发挥。三维钢支撑框架建筑体系的动力行为是复杂的，往往是高度非线性的。在真实系统响应的背景下评估地震性能和开发实用的工程工具是本提案的中心目标。最近举行的一次会议的共识是，开发可靠的支撑框架系统是抗震钢结构研究的重中之重，最近一次会议的重点是设计下一个十年的钢结构工程，并要求开展以下工作：协调一致的国际努力，建立一个中央PBEE框架，将这些活动联系在一起，并与工业、专业实践和相关组织进行合作。这个奖项提供了这样的协调。该项目团队包括来自美国、日本和台湾的研究人员，以及来自加拿大的附属研究人员。这项研究将利用明尼苏达大学(UM)和加州大学伯克利分校(UCB)的NEES设施、日本的NIED/E-Defense Miki振动台和台湾的NCREE实验室。主要目标是利用先进的混合模拟研究方法和国际合作研究，为钢支撑框架体系的高级抗震工程开发基于性能的工具和技术。提出了七个主要研究阶段：(1)基础设施、文献和数据分析，(2)组件和组件集成测试，(3)高分辨率和实用模拟方法的开发和验证，(4)通过协调的国际混合测试设施进行集成系统评估，(5)开发基于概率的支撑框架体系PBEE工程工具，(6)通过地震模拟器测试确认性能，以及(7)设计和分析工具的评估和验证。这项研究的一个关键要素是对原型结构进行国际混合测试，其中包括在台湾的两个NEES设施(UM和UCB)和NCREE实验室同时进行测试，以及在华盛顿大学进行模拟。。更广泛的影响：这项研究对一种被广泛使用的建筑形式的抗震安全性和性能具有直接、有形和直接的影响，许多人认为这种建筑形式不必要地容易受到地震的影响，并加速采用创新技术和建筑实践。在美国，钢结构构成了工程建筑系统的大部分。这项研究将使钢结构建筑更经济，设计方法更可靠，并增加美国公司在全球经济中的竞争力。该项目汇集了美国、台湾和日本的专业工程师、研究人员，以及来自行业和监管机构的代表，以一种综合和协同的方式。一个咨询小组将协助合作和协调，以确保实际和有用的工程成果，并使工程专业人员迅速吸收这些成果。这项研究将通过面向教师和实习工程师培训的专业发展短期课程，增加多样性和国际合作，通过太平洋联盟LSAMP计划为美洲原住民本科生提供实习和研究机会，并为学前班到12年级的学生开发材料，用于教育和探索支撑系统的地震响应。

Abstract 0619161RoederThis award is an outcome of the NSF 06-504 program solicitation "George E. Brown, Jr. Network for Earthquake Engineering Simulation Research (NEESR)" competition. Intellectual Merit: Braced frame systems offer an attractive solution to satisfy multiple design criteria within a performance-based earthquake engineering (PBEE) framework. If detailed properly, their displacement and energy dissipation capacities can meet severe demands resulting from extreme events. However, research results have indicated that current design methods prevent braced frames with traditional and buckling-restrained braces from achieving their potential. The dynamic behavior of three-dimensional steel braced frame building systems is complex and often highly nonlinear. Assessing seismic performance in the context of the true system response and developing practical engineering tools are central objectives of this proposal. The consensus of a recent meeting focused on engineering steel buildings for the next decade was that the development of reliable braced frame systems was a top priority in seismic steel research and required the following: a coordinated, international effort, a central PBEE framework to tying the activities together, and collaboration with industry, professional practice and related organizations. This award provides such coordination. The project team includes researchers from the US, Japan, and Taiwan, as well as affiliated researchers from Canada. The research will utilize the NEES facilities at the University of Minnesota (UM) and the University of California, Berkeley (UCB), the NIED/E-Defense Miki shake table in Japan, and the NCREE Laboratory in Taiwan. The primary objective is to use advanced hybrid simulation research methods and international, cooperative investigation to develop performance-based tools and techniques for advanced seismic engineering of steel braced frame systems. Seven primary research phases are proposed: (1) infrastructure and literature and data analysis, (2) integrated-component and subassemblage testing, (3) development and validation of high-resolution and practical simulation methods, (4) integrated-system evaluation through coordinated, international hybrid testing facilities, (5) development of probabilistic-based engineering tools for PBEE of braced frame systems, (6) confirmation of the performance through earthquake simulator testing, and (7) evaluation and validation of the design and analysis tools. A key element of the research is an international hybrid test of a prototype structure that will include simultaneous testing at the two NEES facilities (UM and UCB) and the NCREE Laboratory in Taiwan, and simulation at the University of Washington. . Broader Impacts: This research has a direct, tangible and immediate impact on the seismic safety and performance of a widely used form of construction that many believe to be unnecessarily vulnerable to earthquakes, and accelerate the adoption of innovative technologies and construction practices. Steel structures constitute the majority of engineered building systems in the United States. This research will make steel buildings more economical, design methods more reliable, and increase the competitiveness of U.S. firms in the global economy. This project brings together professional engineers, researchers in the United States, Taiwan, and Japan, as well as representatives from industry and regulatory bodies in an integrated and synergistic fashion. An Advisory Group will assist in the cooperation and coordination to assure practical and useful engineering results and to provide rapid assimilation of these results by the engineering profession. This research will increase diversity and international collaboration through professional development short-courses oriented towards the training of faculty and practicing engineers, provide internship and research opportunities for Native American undergraduate students through the Pacific Alliance LSAMP program, and develop materials for pre-K through grade 12 students for education and exploration of the seismic response of braced systems.