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

该奖项的广泛研究目标是评估和发展地震地面运动的选择和修改（即，缩尺法用于建筑结构的非线性反应时程分析。为了实现这一目标，本研究将：（1）进行大量的可重构非线性多自由度结构模型的小型振动台试验;（2）调查不同的场地条件，危害水平和结构特性如何影响缩放方法的准确性和效率;和（3）使用实验？基准？结果，以制定抗震设计准则和程序的结构与规则和不规则的配置。振动台试验将形成第一个考虑广泛的建筑物特性和地面运动的非线性动力响应的实验研究。这些可交付成果不仅将提供所需的证据，以便就如何在抗震设计中选择和缩放适当的记录套件达成共识，而且还将确定在离散度最小的情况下保持中值工程需求估算准确性所需的最少记录数量。如果成功，该项目将代表可靠抗震建筑物设计的重大进步，并对工程地震学作出辅助贡献，从而通过减轻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。将邀请杰出的执业工程师和相关专业组织参与，以确保迅速传播结果。劳动力的影响将包括一个博士学位。学生和几个本科生，强烈关注代表性不足的群体。该项目小组将包括来自主要本科院校（加州州立大学-萨克拉门托）的研究人员。研究人员还将利用该项目通过K12活动教育未来的工程师。为了进一步加强该项目的广泛影响，将开发一个新的经验学习模块，在便携式振动台上使用较小版本的非线性模型结构来演示地震工程的基本概念。

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.