NEESR-CR: Performance-Based Design for Cost-Effective Seismic Hazard Mitigation in New Buildings Using Supplemental Passive Damper Systems

NEESR-CR：使用补充被动阻尼系统的新建筑中基于性能的经济高效的地震减灾设计

基本信息

批准号：
0936610
负责人：
Richard Sause
金额：
$ 74.67万
依托单位：
Lehigh University
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：
2009-10-01 至 2013-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0936610&HistoricalAwards=false
关键词：
NEESR CR Performance Based Design

项目摘要

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This award is an outcome of the NSF 09-524 program solicitation "George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Research (NEESR)" competition and includes Lehigh University, California State Polytechnic University, Pomona (Cal Poly Pomona), and California State University, Northridge. This project will utilize the NEES equipment site at Lehigh University.Intellectual Merit: The vision for this research is a validated probabilistic, performance-based seismic design procedure for buildings with passive damping systems. In this procedure, the design of the damping system is integrated with the design of the associated seismic load resisting frames. The uncertainties that influence the level of damage caused by ground motions at different seismic input levels are treated explicitly using probabilistic methods. The procedure considers multiple performance objectives, with each objective associating a different level of damage with a different seismic hazard level. The project will design two steel-framed prototype buildings as the context for the research. Several types of dampers will be studied. Tests at the Lehigh NEES equipment site will characterize the dampers; analytical models for the dampers will be calibrated and validated. Extending previous work, a practical performance-based design procedure, and an associated design assessment procedure for buildings with passive dampers will be developed. These procedures treat inherent uncertainties using partial safety factors. The performance-based design procedure will be used to produce several design cases for each prototype building. The strength of the steel frames and the damper type will be varied among the design cases. Then, each design case will be assessed with a rigorous, probabilistic assessment procedure developed by the project. This assessment uses nonlinear dynamic analyses, and considers the possible damage states of the building while rigorously treating uncertainties in building properties, damping systems, and ground motions. The procedure estimates the probabilities that these damage states are reached at different seismic hazard (input) levels. Large-scale, real-time hybrid simulations at the Lehigh NEES equipment site will validate the rigorous assessment procedure as well as the results of the practical performance-based design procedure. The hybrid simulations will have two phases: Phase 1 uses three individual large-scale dampers as the lab specimens, while the remainder of the building is modeled as an analytical substructure; Phase 2 uses a large-scale, three-story steel frame with dampers as the lab specimen, while the remainder of the building is modeled as an analytical substructure. Phase 1 simulations will be particularly efficient, by enabling numerous ground motions to be applied to the building, resulting in various levels of damage, without the need to repair the test specimens, since the damage will be within the analytical substructures. Phase 2 simulations will validate the overall project approach. This research will produce a validated, rigorous, probabilistic seismic performance assessment procedure for buildings with passive damping systems which addresses significant uncertainties in building performance. This research will also produce a validated, practical, multi-level, probabilistic, performance-based seismic design procedure for buildings with passive damping systems. Full-scale damper characterization test data sets will be produced. Validated analytical models for passive dampers, suitable for numerical simulations, will also be produced. Reliable and well-documented data sets from large-scale, real-time hybrid seismic simulations of buildings with passive dampers will be produced and used to validate the design and assessment procedures. Broader Impacts: This research will produce the knowledge needed to move the performance-based seismic design procedure into practice. Instructional materials for university classes will be developed, and a workshop for practicing engineers will be conducted to help transfer the design procedure into practice. Data from this project will be archived and made available to the public through the NEES data repository.

该奖项根据 2009 年《美国复苏和再投资法案》（公法 111-5）提供资金。该奖项是 NSF 09-524 计划征集“George E. Brown, Jr. 地震工程模拟网络 (NEES)”的结果研究（NEESR）”竞赛包括理海大学、加州州立理工大学波莫纳分校（Cal Poly Pomona）和加州州立大学北岭分校。该项目将利用里哈伊大学的 NEES 设备场地。智力优点：这项研究的愿景是为具有被动阻尼系统的建筑物提供经过验证的概率性、基于性能的抗震设计程序。在此过程中，阻尼系统的设计与相关抗震框架的设计相结合。使用概率方法明确处理影响不同地震输入水平下地面运动造成的损害程度的不确定性。该程序考虑了多个性能目标，每个目标将不同的损坏级别与不同的地震危险级别相关联。该项目将设计两座钢框架原型建筑作为研究背景。将研究几种类型的阻尼器。在 Lehigh NEES 设备现场进行的测试将表征阻尼器的特性；阻尼器的分析模型将得到校准和验证。扩展之前的工作，将开发基于实用性能的设计程序以及针对带有被动阻尼器的建筑物的相关设计评估程序。这些程序使用部分安全系数来处理固有的不确定性。基于性能的设计程序将用于为每个原型建筑生成多个设计案例。钢框架的强度和阻尼器类型在设计案例中会有所不同。然后，每个设计案例将通过项目开发的严格的概率评估程序进行评估。该评估采用非线性动力分析，考虑建筑物可能的损坏状态，同时严格处理建筑特性、阻尼系统和地面运动的不确定性。该程序估计在不同地震危险（输入）水平下达到这些损坏状态的概率。 Lehigh NEES 设备现场的大规模实时混合模拟将验证严格的评估程序以及基于实际性能的设计程序的结果。混合模拟将分为两个阶段：第一阶段使用三个单独的大型阻尼器作为实验室样本，而建筑物的其余部分则建模为分析子结构；第二阶段使用带有阻尼器的大型三层钢框架作为实验室样本，而建筑物的其余部分则建模为分析子结构。第一阶段的模拟将特别有效，因为可以将大量地面运动应用于建筑物，从而导致不同程度的损坏，而无需修复测试样本，因为损坏将发生在分析子结构内。第二阶段模拟将验证整个项目方法。这项研究将为具有被动阻尼系统的建筑物提供经过验证的、严格的、概率性的地震性能评估程序，解决建筑性能中的重大不确定性。这项研究还将为具有被动阻尼系统的建筑物提供经过验证的、实用的、多层次的、概率性的、基于性能的抗震设计程序。将生成全尺寸阻尼器特性测试数据集。还将生成适用于数值模拟的经过验证的被动阻尼器分析模型。来自带有被动阻尼器的建筑物的大规模实时混合地震模拟的可靠且记录齐全的数据集将被生成并用于验证设计和评估程序。更广泛的影响：这项研究将产生将基于性能的抗震设计程序付诸实践所需的知识。将开发大学课程的教学材料，并将举办针对执业工程师的研讨会，以帮助将设计程序转化为实践。该项目的数据将被存档并通过 NEES 数据存储库向公众开放。