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NEEShub Project Warehouse
Quarter 1 Highlights
The Project Warehouse is at the center of NEEShub serving as the centralized data repository for sharing and publishing earthquake engineering research data. The data in the Project Warehouse are associated with research projects funded by a variety of agencies and include experiments performed at NEES and non-NEES equipment sites. Databases are a recent addition to the Project Warehouse. Databases on NEEShub were developed using Project Warehouse and external data. They are repositories of data, vetted by professional communities, and connected to original sources. How does this impact you? With our large network and unique equipment available at each of the 14 locations, it is important to communicate to our growing community the data most recently curated and available on NEEShub. In addition, as projects continue to work towards completion, practitioners can better follow research and how it can impact their work.
Six highlighted projects reported as of December 2011, which take advantage of data viewing within the NEEShub using the tool inDEED, are summarized below:
Investigation of Near-Fault Ground Motion Effects on Substandard Bridge Columns and Bents (Link)
PI: Mehdi Saiidi (U. Nevada Reno)
This shared-use project funded by FHWA involved shaking table tests at the University of Nevada at Reno on large-scale, reinforced-concrete bridge bents and columns. The specimens were subjected to both near-fault and far-field earthquake recordings. The near-fault records generally led to larger strains, curvatures, and drift ratios than those of the far-field motions. The available data include accelerations, forces, displacements and strains measured during the tests.
Development of a Seismic Design Methodology for Precast Floor Diaphragms (Link)
PIs: Robert Fleischman (University of Arizona) , Clay Naito, Richard Sause (Lehigh University), Jose Restrepo (UC San Diego)
This project has an ultimate goal of developing a comprehensive seismic design methodology for precast/prestressed concrete floor diaphragms. Simulation-driven physical experiments were conducted on key precast floor diaphragms details and joints at Lehigh University, and a shaking table test of a half-scale, three-story diaphragm-sensitive precast concrete structure was conducted at UC San Diego. Design factors based on a calibrated analytical model have been developed, and a draft version of the methodology appears in the 2009 NEHRP Recommended Provisions. Available data from the experiments include accelerations, displacements, and forces measured during the tests.
Highly-Damage-Tolerant Slab-Column Frame Systems (Link)
PI: Gustavo Parra-Montesinos , Jerome Lynch (U. Michigan), Carol Shield (U. Minnesota)
This project investigated the development of a highly damage tolerant and smart slab-column frame system through the use of tensile strain-hardening, high-performance fiber reinforced concrete (HPFRC) and wireless sensing technology. Two slab-column connection specimens were subjected to combined gravity load and bi-axial lateral displacements at the MAST facility at the University of Minnesota to assess the shear capacity of HPFRC connections. A third slab-column connection reinforced with shear studs was tested for comparison purposes. Data available from the experiments include forces, displacements, and strains throughout the specimens.
Dynamic Passive Pressure on Full-Scale Pile Caps (Link)
PIs: Travis Gerber, Kyle Rollins (Brigham Young University)
This project investigated the lateral resistance provided to pile caps by the passive resistance of the backfill soil. Full-scale foundations were subjected to cyclic loading in the field using large actuators and shakers of the NEES@UCLA equipment site. Backfill material consisted of sands and gravels in densely and loosely compacted states. Available data from the experiments include accelerations, displacements, shaker forces, and soil pressures measured during the tests.
Development of a Performance-Based Seismic Design Philosophy for Mid-Rise Woodframe Construction (Link)
PI: John Van de Lindt (U. Alabama), Rachel Davidson (U. Delaware), Andre Filiatrault (SUNY Buffalo), David Rosowsky (Texas A&M U.), Michael Symans (RPI)
The NEESWood project developed a new seismic design approach for mid-rise woodframe construction. To support that development, various configurations of a full-scale two-story wood frame townhouse building were subjected to seismic loading on the two tri-axial shake tables of the NEES@Buffalo equipment site. As the largest full-scale three-dimensional shake table test ever performed in the U.S., the results of this series of tests serve as a benchmark for both woodframe performance and nonlinear models for seimic analysis of woodframe structures. Data available from the experiments include accelerations, displacements, and forces measured during the tests.
Study of Surface Wave Methods for Deep Shear Wave Velocity Profiling Applied to the Deep Sediments of the Mississippi Embayment (Link)
PIs: Brent Rosenblad (U. Missouri)
This project investigated the shear wave velocity (Vs) structure of the Mississippi Embayment using a variety of active and passive surface wave measurement methods at 11 sites in Arkansas, Tennessee, and Missouri. The active-source measurements were performed using the low-frequency field vibrator of the NEES@UTexas equipment site. The unprocessed data, the processed dispersion curves, and the derived shear wave velocities are available. Shear wave velocity information for these sites is also available in the NEES Shear Wave Velocity Profiles Database (http://nees.org/resources/2262).