Evaluation of Ground Motion Scaling Methods for Nonlinear Analysis of Structural Systems

用于结构系统非线性分析的地面运动缩放方法的评估

• 批准号: 0928662
• 负责人: Yahya Kurama
• 金额: $ 11万
• 依托单位: University of Notre Dame
• 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: 2009-09-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928662&HistoricalAwards=false
• 关键词: Evaluation; Ground; Motion; Scaling; Methods

The broad research objective of this award is to assess and develop earthquake ground motion selection and modification (i.e., scaling) methods for the nonlinear response history analysis of building structures. To achieve this objective, the research will: (1) conduct a large number of small-scale shake-table experiments of re-configurable nonlinear multi-degree-of-freedom structural models; (2) investigate how different site conditions, hazard levels, and structure characteristics affect the accuracy and efficiency of the scaling methods; and (3) use the experimental ?benchmark? results to develop seismic design guidelines and procedures for structures with regular and irregular configurations. The shake-table tests will form the first experimental study on nonlinear dynamic response considering a wide range of building characteristics and ground motions. These deliverables will not only provide the evidence needed to develop consensus on how an appropriate suite of records should be selected and scaled in seismic design, but also establish the minimum number of records needed to retain accuracy in the median engineering demand estimates with minimum dispersion.If successful, the project will represent a major advancement on the design of reliable earthquake-resistant buildings with ancillary contributions to engineering seismology, thus providing direct service to society by mitigating loss of life and property from future seismic events. Prominent practicing engineers and relevant professional organizations will be engaged to ensure rapid dissemination of the results. The workforce impact will include one Ph.D. student and several undergraduates, strongly focusing on underrepresented groups. The project team will include researchers from a predominately-undergraduate institution (Cal State - Sacramento). The researchers will also utilize the project to educate future engineers through K12 activities. To further enhance the broader impacts from the project, a new experiential learning module will be developed to demonstrate basic concepts in earthquake engineering using smaller versions of the nonlinear model structures on a portable shake-table.

该奖项的广泛研究目标是评估和开发用于建筑结构非线性响应历史分析的地震地震动选择和修正（即标度）方法。为了实现这一目标，研究将：(1)进行大量可重构非线性多自由度结构模型的小尺度振动台试验；(2)研究不同场地条件、危险等级和结构特征对标度方法精度和效率的影响；(3)使用实验基准？结果开发抗震设计准则和程序的结构与规则和不规则配置。振动台试验将形成第一个考虑大范围建筑特性和地面运动的非线性动力响应的实验研究。这些成果不仅将为如何在地震设计中选择和扩展合适的记录套件提供必要的证据，而且还将建立所需的最小记录数量，以保持工程需求估计中位数的准确性和最小的分散。如果成功，该项目将代表可靠的抗震建筑设计的重大进步，并对工程地震学做出辅助贡献，从而通过减少未来地震事件造成的生命和财产损失为社会提供直接服务。将聘请著名的执业工程师和相关专业组织，以确保结果的迅速传播。对劳动力的影响将包括一名博士生和几名本科生，重点关注未被充分代表的群体。项目团队将包括来自本科生为主的机构（加州州立大学萨克拉门托分校）的研究人员。研究人员还计划通过K12活动，利用该项目培养未来的工程师。为了进一步增强项目的广泛影响，将开发一个新的体验式学习模块，在便携式振动台上使用更小版本的非线性模型结构来演示地震工程的基本概念。