SCEC Award Number 19129 View PDF
Proposal Category Collaborative Proposal (Integration and Theory)
Proposal Title Implementation of New Capability in AWP-ODC: Delivery of Within Motions for Scientific and Engineering Research
Investigator(s)
Name Organization
Christine Goulet University of Southern California Ossian O'Reilly University of Southern California Kim Olsen San Diego State University Daniel Roten San Diego State University Doriam Restrepo Universidad EAFIT (Colombia)
Other Participants
SCEC Priorities 4d, 4a, 4b SCEC Groups EEII, GM, CS
Report Due Date 04/30/2020 Date Report Submitted 08/14/2020
Project Abstract
 Both the science and engineering research communities work on applied science issues, but they tend to approach those from very different perspectives. On the science front, research tends to focus on better understanding the fault mechanics and the earthquake source processes, and to understand wave propagation over large regional scales. On the engineering front, the research is aimed at better understanding site and infrastructure response to ground motions, and to evaluate different design strategies. Both types of analyses are usually performed at different scales and lead to a gap in terms of the ground motions deliverable from science groups to engineering groups. In this project, we aim to further bridge this gap as it applies to end-to-end (or rupture to rafters) simulations. We use a concept called Domain Reduction Method (DRM) as a tool to improve the science-engineering ground motion interface. Toward the goal of enabling DRM calculations, we have implemented a new feature in AWP-ODC-GPU to efficiently save time series directly at arbitrarily pre-specified locations. Here, we provide a demonstration of this new capability, for the purpose of modeling soil-structure interaction, using a rectangular box surrounding a location in the Los Angeles area for the 2014 M5.1 La Habra, CA, earthquake. The size of the output box is 20 by 20 by 10 grid points, which corresponds 160 m by 160 m by 80 m.
Intellectual Merit The added capabilities in AWP-ODC-GPU will allow researchers to better understand the interaction between earth material and man-made structures for earthquake ground motions.
Broader Impacts The code capabilities added during our project will further bridge the gap between science and engineering research communities as it applies to end-to-end (or rupture to rafters) simulations, specifically, using the Domain Reduction Method (DRM) as a tool to improve the science-engineering ground motion interface. We have modified the wave propagation code AWP-ODC-GPU (Cui et al., 2010; Nie et al., 2017) so it can deliver ground motions from large simulations in a way that can be more useful to research engineers.
Exemplary Figure Figure 3. 3D view of the where we output synthetics at the 5 edges (see Figure for location), and the top light brown layer displays the surface. The colors depict the Peak Ground Velocity (PGV).