cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17603/ds2-nqqt-za42
title: Database of Flanged Reinforced Concrete Squat Walls

description: Flanged reinforced concrete (RC) squat walls are widely used in conventional buildings and nuclear facilities, due to their capabilities of meeting certain architecture demands and providing significant lateral strength and stiffness in both principle directions. Despites their popularities and advantages, understanding for these walls are still limited, due to the complexities brought by the non-rectangular cross-section shaped and the relatively small shear span ratio. Moreover, current building codes are mainly developed for rectangular slender walls, which exhibit significant scatters in predicting peak shear strength of effective stiffness to these walls. To facilitate future investigations, a database containing comprehensive information about 152 flanged RC squat walls is presented in this project. Researchers are encouraged to continuously upgrade this database.
DOI: 10.17603/ds2-s3fm-2870
title: Gravel roof pressure and shear stress measurements
title: in Roof gravel motion initiation

description: Data from this project includes pressure and shear stress measurements from the FIU WOW-EF on a square plan building.
description: pressure and shear stress measurements at the surface of a gravel roof on a flat roofed square plan building at different parapet heights.
DOI: 10.17603/ds2-y0wn-cs71
title: Undergraduate Research Experience (REU), NHERI 2019: Survey and Investigation of Residential Buildings Damaged by Hurricane Michael

description: Part of an investigation team that analyzed damaged and destroyed residential buildings from Hurricane Michael, focused mostly on Mexico Beach, FL. The instrumentation and methodology are outlined but no clear results were collected.
DOI: 10.17603/ds2-1f7x-9a52
title: NHERI Impact 2020, Multi-hazard Research to Make a More Resilient Nation

description: The  NHERI Impact 2020 book is a 70-page collection of illustrated articles detailing research in the field of natural hazards engineering — all of which took place at one of the 12 NSF-funded NHERI network facilities. The book features a range of NSF-funded projects that mitigate structural and societal damage from earthquakes, hurricanes and windstorms, storm surge, flooding and tsunami waves. Topics include centrifuge, wind tunnel, shake table and real-time hybrid simulation testing; soil behavior tests; insights on wind and tsunami wave behavior; non-destructive infrastructure testing, post-disaster reconnaissance, and simulation software tools. Article authors are notable faculty researchers and industry consultants from around the country, all leveraging NHERI’s shared-use facilities and working toward creating a more resilient civil infrastructure. Readers will learn about NSF Convergence research, extreme events research, and the social science components of natural hazards research.
DOI: 10.17603/ds2-crtg-j217
title: Isotropically-consolidated drained and undrained triaxial compression tests on soils of varying gradation
title: in In Situ Characterization of Well-graded Coarse-grained Soils: Monotonic Triaxial Tests on Soils of Varying Gradation

description: Performed a series of triaxial compression tests in a systematic manner to isolate the effects of soil gradation on the strength, stress-dilatancy, and excess pore pressure generation of coarse-grained soils.
description: Isotropically-consolidated drained and undrained triaxial compression tests
DOI: 10.17603/ds2-h8ds-0s28
title: Wind Pressure Investigation on a Rectangular Rigid Model
title: in Long-Duration Wind Tunnel Pressure Dataset For an Isolated and Non-Isolated Rectangular Building

description: An experimental testing was conducted at the NHERI University of Florida Boundary Layer Wind Tunnel (BLWT) facility on a rectangular rigid model. The pressure coefficients on 510 taps were measured, considering two experimental configurations: one with an isolated model, and the other considering two additional proximity models. A total of 10 angles was measured for the isolated model configuration, and 19 angles for the proximity model configuration. The angles ranged from 0 to 90 degrees and 0 to 180 degrees, respectively, with increments of 10 degrees between measurements. A total of 5 repetitions with duration of about 15 minutes in model scale were collected for each wind direction. A cobra probe was placed upstream the model at the model height to measure the reference wind speed during the experiments. The terraformer elements were placed uniformly at 160mm height to ensure roughness corresponding to Exposure B (suburban). The flow is driven by 8 vaneaxial fans set to 1200 RPM and Marine Spires.
description: The research objective of this project was to characterize the uncertainties associated with wind tunnel records, which is crucial to enable the probabilistic performance assessment of wind-excited building systems. To this end, the wind pressure on a rectangular rigid model with 510 taps was measured. Two different experiment configurations were conducted: one considering an isolated model and the other considering two proximity models aiming at investigating interference effects. The experiments were conducted at the NHERI Boundary Layer Wind Tunnel Facility at the University of Florida. A total of 10 wind directions were considered for the isolated model, ranging from 0 to 90 degrees, with an increment of 10 degrees. For the proximity model configuration, a total of 19 wind directions were considered, ranging from 0 to 180 degrees, in increments of 10 degrees. A total of 5 repetitions of 15 minutes each (model scale) were collected for each angle and each configuration. The pressure coefficient time series of each pressure tap is provided, as well as data for the wind speed profile measured at the center of the test section. The extensive dataset can be reused by other users for multiple purposes as it allows in-depth statistical analyses and provides two comparable sets where interference effects can also be investigated. Further, the high sampling frequency, the long duration of the data, and the large density of taps spatially provide high-resolution of the wind pressures in space, time, and frequency content, unlike typical wind tunnel datasets.
DOI: 10.17603/ds2-qjb2-na76
title: Merging 360° Streetview Images and LiDAR:  A Usable Data Product for Future Analysis

description: This project is about colorizing LiDAR point clouds with a structure-from-motion point cloud. Data in this project can be reused by those interested in using RAPID facility equipment to survey natural hazard areas. This project is unique due to the hardware and software combination used. The audience is users of the RAPID facility equipment and anyone who has interest in the colorization of LiDAR point clouds.
DOI: 10.17603/ds2068f
title: KyU1, KyU2, KyU3 - Kyoto University Experiments, in PRJ-1843: LEAP-UCD-2017
title: in LEAP-UCD-2017 Experiments (Liquefaction Experiments and Analysis Projects)

description: Twenty-four centrifuge model tests of liquefaction and lateral spreading, performed as part of a round robin test program, are shared and compared in this archive. Please see the general report section of the published project for an overview comparison and background of all of the experiments. One document in the report (with “ReadMe” in the file name) describes the organization of the data archive. The comparisons presented in the general report section will serve as an index to help the users find individual experiments of interest.  This data from 24 model tests is published as nine separate experiments in this archive (one experiment per centrifuge facility). Each "experiment" includes two or three model tests and each model test includes between one and three destructive shaking events.
All of the tests modeled a 4 m thick deposit of Ottawa F-65 sand with a 5-degree surface slope in a rigid box. The tests covered a range of ground motion intensities and a range of relative densities to define the median response and the sensitivity of the response to relative density and shaking intensity. The nine centrifuge facilities involved in this test program included Cambridge University (UK), Ehime University (Japan), IFSTTAR (France), NCU (Taiwan), KAIST (Korea), Kyoto University (Japan), RPI (USA), UC Davis (USA), and Zhejiang University (China).
description: Lateral spreading of a submerged slope for LEAP-UCD-2017
DOI: 10.17603/ds2-10sx-t565
title: Shear Buckling Tests on Stiffened I-Shaped Plate Girders: Flat Versus Low-Frequency Sinusoidal Webs - LFS Plate Girder
title: in Collaborative Research: Shear-Buckling Mechanics for Enhanced Performance of Thin Plates

description: Shear buckling tests were conducted to assess the performance of the first fabricated LFS web girder prototype, compare it to a traditional flat web prototype, and study the mechanics of web shear buckling in welded plate girders at the scale of a realistic bridge girder.
description: Thin steel plates are commonly used as structural elements in buildings, bridges, towers, aircrafts, etc. Due to their slenderness, these plates are susceptible to buckling under shear loading, thus limiting their capacity. The recent research shows that many existing models do not represent the true mechanics of ultimate shear buckling. This project will investigate and advance the knowledge of shear buckling response, thus leading to improved economy, durability, and safety of structures that use thin plates. The focus of this study is on steel plates, but it lays the foundation for other materials such as aluminum and composites that can be considered in future work. This project also addresses the grand challenges recently issued by the American Society of Civil Engineers (ASCE): (a) significantly enhance the performance and value of infrastructure projects over their life cycles by 2025, and (b) foster the optimization of infrastructure investments for society. The results will increase cost efficiency via decreased material usage; enhance robustness via increased ultimate shear strength; and reduce occurrence of buckling and increased resilience to unexpected loads (e.g. with fewer required repairs) via increased buckling load capacity.

The overall objective of this project is to comprehensively investigate the mechanics of shear buckling behavior in steel plates, thus leading to (a) new predictive models that capture the true mechanics, and (b) design modifications that increase economy, robustness, and life-cycle performance. The research plan involves both nonlinear finite element studies and experimental tests. A detailed examination of the stress patterns and load redistribution from the elastic buckling stage to the ultimate postbuckling capacity will be the primary focus. Physical tests will explore new panel configurations, and potential material optimizations will be identified based on finite element mechanics studies. Experiments will be conducted using facilities at Lehigh University to examine the shear buckling performance of steel plate girder specimens, both with and without bending moment. The data from these tests will be used to directly validate the computational modeling approaches.
DOI: 10.17603/ds2-1rvg-dv22
title: Ground Motion Intensity Viewer - Graphical User Interface (GMIV-GUI)

description: This code contains the necessary functions used to create the GUI to view the the earthquake data related to 7 events: The 2019 Ridgecrest Earthquakes [M5.47, M6.48, & M7.06] AND The 2023 Kahranmanmaras Earthquakes [M6.37 Yayladagi, M6.81 Nurdagi, M7.74 Elbistan, & M7.81 Pazarcik]. 

The code allows for a spatial view of all the stations that recorded each event as well the range of values associated with each intensity measure provided (113 Psuedo Spectral Intensity measures; PGV, PGA, af PSA for T = 0.01 - 20 seconds). Also included are the event hypocenters locations and, for some, the fault traces and/or falt area projections. This is provided on a map that is defaulted to a Google Terrain background to elucidate basin and non-basin areas. In addition, distance ranges around the earthquake event hypocenter is provided.

The Jupyter Notebook GMIV Viewer can be opened via the DesignSafe virtual instance of Jupyter Notebook. All that is needed is to search for the project number (PRJ-4608) in the Jupyter Notebook directory.

The data compiled for this project was sourced from the following references:

Ahdi, S. K., Mazzoni, S., Kishida, T., Wang, P., Nweke, C. C., Kuehn, N. M., Contreras, V., Rowshandel, B., Stewart, J. P., Bozorgnia, Y.; Engineering Characteristics of Ground Motions Recorded in the 2019 Ridgecrest Earthquake Sequence. Bulletin of the Seismological Society of America 2020; 110 (4): 1474–1494. doi: https://doi.org/10.1785/0120200036; 

Buckreis, T., B. Güryuva, A. İçen, O. Okcu, A. Altindal, M. Aydin, R. Pretell, A. Sandikkaya, O. Kale, A. Askan, S. Brandenberg, T. Kishida, S. Akkar, Y. Bozorgnia, J. Stewart. (2023) "Ground Motion Data from the 2023 Türkiye-Syria Earthquake Sequence." DesignSafe-CI. https://doi.org/10.17603/ds2-t115-bk16
DOI: 10.17603/ds2-4bka-y039
title: RapidLiq: Software for Near-Real-Time Prediction of Soil Liquefaction

description: RapidLiq is a Windows software program for predicting liquefaction-induced ground failure using geospatial models, which are particularly suited for regional scale applications such as: (i) loss estimation and disaster simulation; (ii) city planning and policy development; (iii) emergency response; and (d) post-event reconnaissance (e.g., to remotely identify sites of interest). RapidLiq v1.0 includes four such models. One is a logistic regression model developed by Rashidian and Baise (2020), which has been adopted into United States Geological Survey (USGS) post-earthquake data products, but which is not often implemented by individuals owing to the geospatial variables that must be compiled. The other three models are machine and deep learning models (ML/DL) proposed by Geyin et al. (2021). These models are driven by algorithmic learning (benefiting from ML/DL insights) but pinned to a physical framework (benefiting from mechanics and the knowledge of regression modelers). While liquefaction is a physical phenomenon best predicted by mechanics, subsurface traits lack theoretical links to above-ground parameters, but correlate in complex, interconnected ways - a prime problem for ML/DL. All four models are described in an acompanying paper manuscript.

All necessary predictor variables are compiled within RapidLiq, making user implementation trivial. The only required input is a ground motion raster easily downloaded within minutes of an earthquake, or available for enumerable future earthquake scenarios. This gives the software near-real-time capabilities, such that ground failure can be predicted at regional scale within minutes of an earthquake. The software outputs geotiff files mapping the probabilities of liquefaction-induced ground failure. These files may be viewed within the software or explored in greater detail using GIS or one of many free geotiff web explorers (e.g., http://app.geotiff.io/). The software also allows for tabular input, should a user wish to enter specific sites of interest and ground-motion parameters at those sites, rather than study the regional effects of an earthquake. RapidLiq v.1.0 operates in the contiguous U.S. and completes predictions within 10 seconds for most events.
DOI: 10.17603/ds2-4jyt-n913
title: Assessing the Influence of Hazard Mitigation Planning on Disaster Recovery

description: The hazard mitigation plan quality dataset allows researchers to understand the performance of local hazard mitigation policies. The dataset was collected by a research team of graduate students through content analysis of county hazard mitigation plans in the Southeastern states of the US (i.e., Florida, Georgia, and North Carolina). The included jurisdictions consist of a list of randomly selected cities and counties. This plan quality dataset can be integrated to assess the overall quality of the built environment, local allocations of resources, and communities' capacity for hazard risk reduction.
DOI: 10.17603/ds2-72k9-fs97
title: Bond Stress Development of Partially-Bonded Anchors
title: in Replaceable and Post-Installed Anchors Monotonic and Cyclic Tension Testing Program

description: This project consists of two phases of experimental research. The first phase of involved investigating the effects of detailing anchor bolt connections for steel column baseplates with well-defined stretch length as a method to provide ductility at such locations. To this end, an innovative connection design for large-diameter replaceable anchors is tested to expand on prior research. The second phase involved studying the efficacy of post-installed adhesive anchors, incorporating various stretch lengths, evaluated under monotonic and quasi-static cyclic tensile loading to assess their tensile capacity and displacement capacity in retrofit scenarios. Although fully-bonded adhesive anchors are well understood and incorporated into US design standards, partially-bonded anchors—designed to reduce tensile stresses near concrete surfaces—offer potential benefits, particularly in mitigating brittle concrete failure. 
description: This phase of testing involved single anchor, confined monotonic and quasi-static cyclic tension testing of adhesive anchors where some portion of the embedded length is debonded from the concrete substrate. Two different concrete strengths, two different adhesives, and three anchor diameters were utilized in this phase of testing. Objectives included determining bond and stiffness properties, τ , τ0, τmax, λ’, specific to each adhesive, evaluating the bond stress development of partially-bonded anchors, and quantifying the effects of cyclic loading on the performance of partially bonded anchors.
DOI: 10.17603/ds2-eqhr-fc75
title: Research Experiences for Undergraduates (REU), NHERI 2023: Combining Gray and Green Infrastructure to Protect Coastlines Through Wave Attenuation

description: The project discussed in this paper explores the combination of wave attenuation and wave overtopping equations to determine if the relationship is linear. The results and discussion section of this paper focuses on the wave attenuation aspect and the impact that gray and green infrastructure have together on reducing the energy of waves. The data from these experiments can be used to further our knowledge of how to implement mangroves on the coast to improve current protection measures. These results can be used to inform future guides and manuals of practice on how mangroves can be used in conjunction with gray infrastructure when designing sea defenses along shorelines. This project is unique in that no previous studies have attempted to find the relationship between mangroves and wave overtopping. In addition, determining the optimal combination of gray and green infrastructure has not been explored in prior research experiments. This paper can be used in the future by other researchers for comparison with their own wave attenuation and wave overtopping studies in relation to mangroves.
DOI: 10.17603/ds2-mkc5-b889
title: Lightly Cemented Model - GLH08s
title: in Liquefaction resistance of MICP treated sands

description: A lightly cemented model was saturated with a de-aired viscous fluid. The model was subjected to a series of shaking events at 80-g. Shear wave velocity and cone penetration measurements were obtained at select times.
description: A set of 1-m radius centrifuge tests on saturated loose Ottawa sand models treated to various cementation levels and subjected to multiple shaking events.  Changes in cone penetration resistance and shear wave velocity are monitored throughout each test.
DOI: 10.17603/ds2-pj7z-k907
title: ISROC Dataset for: Coastal boulders as evidence for high-energy waves on the Iranian coast of Makran
title: in Inundation Signatures on Rocky Coastlines (ISROC) Global Coastal Boulder Deposits Datasets Version 1

description: This document contains standardized data as an Excel and NC file and explanatory notes for "Coastal boulders as evidence for high-energy waves on the Iranian coast of Makran." The project includes 58 coastal boulder deposits on the Makran coast. The aim is to determine how the boulders were inundated on the coast. The project determined that the boulders are of tsunami origin, showing evidence of paleotsunamis.
description: This project is a collection of datasets on studies about coastal boulder deposits worldwide. Each document is a unique dataset that contains data from a published study. The document's name reflects the name of the associated paper, and all authors of papers are given credit in the respective document. Each dataset's data is standardized into an ISROC-formatted Excel and NC File. Also, every dataset has explanatory notes, which contain a data dictionary explaining data parameters and appropriate units, Some datasets have the raw data given to ISROC by the paper's authors. By creating a database in the public domain, ISROC hopes to promote academic collaboration in the field. ISROC, an NSF-funded research network, funds this project.
DOI: 10.17603/ds2-t1ry-4s93
title: Hybrid Simulation and Quasistatic Test - Prototype A
title: in Hybrid and Cyclic Testing of Steel Moment Frames with Deep Column

description: Steel moment frames composed of wide-flange steel members are commonly used in seismic regions, with deep and slender column sections often selected to economically satisfy drift limit requirements. The section slenderness makes the columns more susceptible to local and global buckling and subsequent axial shortening when subjected to combined high axial forces and lateral deformations. Numerous tests have been conducted on individual column members under a wide range of axial loads and loading patterns. Experimental data of subassembly or complete frame configurations providing insight into system level interaction of the column with the frame are limited. This study presents experimental results from a full-scale testing program conducted on four cruciform beam-to-column subassemblage subjected to loading patterns based on cyclic quasi-static and slow hybrid simulation. Quasi-static tests followed standard AISC loading protocol with constant column axial load ranging from 20% to 40% of the yield capacity. Advanced hybrid simulations were also conducted to subject the specimens to realistic earthquake loading patterns to levels consistent with design basis earthquake (DBE) and maximum considered earthquake (MCE) ground motions. A full nonlinear model of a complete 6-story frame was developed for the numerical substructure in the hybrid simulation. The observed local and global responses of two quasi-static and two hybrid tests are presented, providing valuable data towards improving the understanding of progress of damage for these systems through advanced testing techniques.
description: A series of four advanced hybrid simulations and cyclic quasistatic test conducted on prototype building A
DOI: 10.17603/ds2-w41b-4j65
title: Research Experiences for Undergraduates (REU), NSF NHERI 2024: Aerodynamic Wind Load Assessment of Parallel Solar Panels: Evaluating Surface-Rooftop Pressure Correlations

description: Wind loads on parallel photovoltaic (PV) panel arrays mounted on low-rise roofs were investigated using an open-circuit, atmospheric boundary-layer wind tunnel. Specifically, the pressure coefficients on the bottom surface of the PV and the rooftop were compared. This study aimed to evaluate a new testing method where pressure taps are placed on the rooftop of a model instead of the bottom surface of the PV panel, significantly reducing testing time and data errors. These results will aid researchers who can implement these results in future tests to improve aerodynamic PV testing efficiency.