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Calibrating Ground Response Analyses beneath an Instrumented Bridge Using the I-15 Borehole Array and Ground Motions from the Magna Earthquake

项目名称：	Calibrating Ground Response Analyses beneath an Instrumented Bridge Using the I-15 Borehole Array and Ground Motions from the Magna Earthquake
摘要：	On March 18, 2020, a magnitude 5.7 earthquake struck the Salt Lake Valley near Magna, Utah. Important ground motions were recorded by a geotechnical borehole array installed near the intersection of I-15, I-80 and SR-201 in Salt Lake City. Borehole arrays play a key role in understanding seismic site response and in calibrating numerical ground response analyses (GRAs). This particular borehole array is even more valuable, as it lies in close proximity to a flyover bridge that is instrumented with 18 accelerometers that recorded structural response during the Magna earthquake. There is a need to study the ground motions recorded by the I-15 borehole array as a means to calibrate seismic GRAs that can inform numerical modeling at bridge sites throughout the Salt Lake Valley where shaking was not recorded. The overarching research objective of this proposal is to perform numerical 2D and 3D GRAs for the I-15 borehole array site using a large, site-specific 3D shear wave velocity model that will be developed from non-invasive methods. The GRAs will then be calibrated at small- to moderate-strains using the ground motions recorded by the borehole array throughout its lifetime and during the 2020 M5.7 Magna earthquake and its aftershocks.
状态：	Active
资金：	120000
资助组织：	Office of the Assistant Secretary for Research and Technology
管理组织：	Mountain-Plains Consortium
项目负责人：	Tolliver, Denver
执行机构：	Civil & Environmental Engineering Department
主要研究人员：	Cox, Brady R.
开始时间：	20221011
预计完成日期：	20230731
主题领域：	Bridges and other structures；Design；Geotechnology；Highways