cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17603/ds2-ewga-yb83
title: Research Experiences for Undergraduates (REU), NSF NHERI 2024: Justifying Physical-Visual Pedagogies that Mitigate Excess Cognitive Load in Undergraduate Engineering Mechanics Courses

description: Physical-visual (PV) learning tools such as physical models may be used in undergraduate civil engineering mechanics courses to enhance student understanding of mechanics concepts. This paper is a proposal that serves to justify the use of physical models as a tool to mitigate poor academic performance in undergraduate civil engineering education (UCEE) through an investigation of pre-existing educational structures and pedagogies. Physical models achieve this through their effective compartmentalization of structural mechanics principles, their ability to express in a tactile means the mechanical behaviour of a structural member and/or system as per their own physicality, and fostering a problem solving approach that values student-synthesis of mechanics in action in supplement of its principle, mathematical form. To establish the plausibility of turning complex mechanical behaviours into PV learning tools, a LiDAR Point Cloud (PC) to 3D printed model workflow-primitive was developed.
DOI: 10.17603/ds2-nfys-wh23
title: Multi-Towers Testing under downburst winds
title: in 186n-Downburst_Transmission_Tower

description: The study involves a full-scale TLS with four bays spanning 396m and three identical self-supported towers called Delta Towers, each 59.75m in height. Two end frames were positioned at the far ends of the TLS to support the three conductors. Each tower carried three conductors, with two conductors bundled on each cross-arm and the third suspended at the midpoint of the top girder. 
description: Transmission Line Systems (TLSs) play a pivotal role in modern society by serving as the primary infrastructure for delivering electricity from power plants to residential buildings, healthcare facilities, and industrial zones. The extensive network of electricity transmission towers and power lines spans approximately 640,000 miles across the United States, ensuring nationwide electricity distribution. However, the lengthy nature of these systems makes them vulnerable to extreme weather events such as hurricanes, tornadoes, and downbursts. Downbursts are intense, localized columns of rapidly descending cold air originating from thunderstorm clouds generating powerful lateral winds upon reaching the ground that can cause severe structural damage to TLSs. Of many differences between atmospheric boundary layer (ABL) and downburst winds, the highest wind speed in a downburst event occurs 50m to 100 m above the ground surface, intensifying the wind effects on most structures, particularly TLSs. Additionally, the spatiotemporal effect of downbursts tremendously alters the wind loading on lengthy TLSs, potentially leading to structural failures and disruptions in the electricity supply chain.
A grounding step was to design a scaled transmission tower-insulator-conductor system with a geometric scale of  1:50 in the vertical direction and a distorted scale of 1:150 in the horizontal direction. This design was made in three steps: (1) designing and constructing a damaged transmission tower, (2) designing and constructing an undamaged transmission tower, and (3) incorporating the undamaged transmission tower into a TLS comprising three transmission towers. In each step, the model was tested under ABL and downburst winds, except in step (1), where the model was only tested under downburst winds, as shown in Figure 1. We also included two special test cases to heighten the realism level by simulating non-uniform loading and conductor breakage cases. These testing cases were conducted at NSF NHERI Wall of Wind Experimental Facility (WOW EF). 

Awards: Collaborative Research: Downburst Fragility Characterization of Transmission Line Systems Using Experimental and Validated Stochastic Numerical Simulations || CMMI 1762968 & CMMI 1762918
DOI: 10.17603/ds2-tm3k-ys37
title: Research Experiences for Undergraduates (REU), NHERI 2022: Wave Height and Reflection Analysis using the Orbital Velocity Method for Irregular Waves

description: The goal of this project was to quantify wave reflection and expand the Orbital Velocity method to treat irregular waves. The MATLAB program automated and optimized the calculation of the incident and reflected wave height for regular waves. This research applies to wave laboratory instrumentation setup and wave reflection analysis.
DOI: 10.17603/ds2-v6gk-8b47
title: Seat-type abutments in CA multi-span box-girder bridges
title: in C T1780 | Seat-type abutment sample from CA multi-span box-girder bridge inventory

description: This project performs inventory analysis of seat-type abutment sample from CA multi-span box-girder bridge.  A workbook was created to provide complete background and supporting materials. It also includes a full description of the sampling processes used.
description: Seat-type abutment sample from CA multi-span box-girder bridge
DOI: 10.17603/ds2-3jpz-sk97
title: Low-Rise Large Volume Building  Reconnaissance after Hurricane Michael using RAPID Facility Technologies (lidar, UAVs, GPS, photos)
title: in Hurricane Michael Reconn-Large Volume Buildings

description: Collapsed and partially collapsed low-rise large volume buildings.
description: Reconnaissance data for a RAPID project on large volume building damage in Hurricane Michael
DOI: 10.17603/ds2-tfjt-0n76
title: Tsunami Debris Motion and Loads in a Scaled Port Setting: Comparative Analysis Data for the Material Point Method
title: in Tsunami Debris Motion and Loads in a Scaled Port Setting: Comparative Analysis Data for Three Numerical Methods

description: Data repository for "Tsunami debris motion and loads in a scaled port setting: Comparative analysis of three state-of-the-art numerical methods against experiments" by Bonus et al. 2025: 
https://doi.org/10.1016/j.coastaleng.2024.104672

Repository includes scaled, 3D tsunami debris simulation results in three numerical methods: the Material Point Method (MPM, ClaymoreUW), Smoothed Particle Hydrodynamics (SPH, DualSPHysics), and Eulerian grid-based computational fluid dynamics (CFD, Simcenter STAR-CCM+). This data repository contains results on the long wave generation from a vacuum-controlled tsunami wave maker, longitudinal displacement of debris forward and back, lateral spreading angle of debris, interactions of stacked debris, and impact forces measured with debris accelerometers and/or obstacle load-cells for the digital flume models of each respective numerical method.

The comparative analysis is done for a benchmark set at 1:40 Froude scale to model experiments of shipping containers mobilized into and amidst a port setting with simplified and generic structures, closely related to the seminal Tohoku 2011 tsunami case histories which majorly affected seaports. A wave flume at Waseda University in Tokyo, Japan, hosted the experiments as reported by Goseberg et al. 2016 (https://doi.org/10.1016/j.coastaleng.2016.08.012). Across dozens of trials, an elongated vacuum-chamber wave surges and spills over a generic harbor apron, mobilizing 3–6 hollow debris-modeling sea containers-, in 1–2 vertical layers against friction. One to two rows of 5 square obstacles are placed upstream or downstream of the debris, with widths and gaps of 0.66x and 2.2x of debris length, respectively.

The data repository is intended for inclusion in further comparative analysis efforts that study the efficacy of numerical methods and software for tsunami debris modeling.
description: The Material Point Method (MPM) was applied in a comparative analysis study to replicate stochastic wave flume experiments on tsunami debris motion and loads in a scaled port setting. ClaymoreUW MPM was the software used. Configuration files for the digital flume's specification per experimental case are contained along with their corresponding output files (e.g., wave-gauges, load-cells, debris-trackers).
DOI: 10.17603/ds2-v5sp-3g45
title: Cone penetration test-based correlations to forecasat critical state parameters

description: In critical state soil mechanics, the critical state refers to the combination of effective stress and void ratio (e) at which a soil continues to shear with no change in effective stress, shear stress, and e. The phenomena can be visualized using the critical state line (CSL). The CSL represents the locus of e at critical state with effective mean stress (σ′mean). To define the CSL, the CSL slope (λ), termed “compressibility,” and CSL y-axis intercept at 1 kPa (Γ), termed “altitude,” are required. The CSL in e – σ′mean space provides a simple model of complex soil behavior that allows engineers to construct constitutive models using the state parameter (ψ), which is the mathematical difference between the in-situ e of the soil and the e of the soil at critical state. Currently, Γ can be obtained only through laboratory testing, while λ and ψ can be obtained via laboratory testing or correlation. This paper presents forthcoming correlations based on the ΔQ soil behavior index (which is obtained via the cone penetration test, CPT) to forecast Γ, λ, and ψ, and compares the ΔQ-based correlations’ performance to other CPT-based correlations as well as to data obtained from literature. To compare the correlations, the authors used data from a site investigation performed in Fraser River sand as part of the Canadian Liquefaction Experiment.
DOI: 10.17603/ds2-fc6h-c949
title: Hurricane Ike 2008
title: in FCMP Ground Level Hurricane Wind Data (1999 - 2008)

description: The Florida Coastal Monitoring Program (FCMP) is a collaborative experimental effort to measure ground level hurricane surface winds. This publication provides data files of ground level wind speed and direction measured along the east coast of Florida during landfall of Hurricanes: Irene 1999,  Gordon 2000, Lili 2002, Charley 2004, Ivan 2004, Jeanne 2004, Dennis 2005, Katrina 2005, Rita 2005, Wilma 2005, Gustav 2008, Hanna 2008 and, Ike 2008. Urbanists, social scientists, structural engineers, and meteorologists, among others, can use these real wind speed measurements and directions in myriad disaster research and planning projects.
description: Portable weather stations were deployed along the coast and/or inland to collect wind observations. This publication provides data files of ground level wind speed and direction measured along the coast during landfall of Hurricane Ike 2008.
DOI: 10.17603/ds2-znfv-8t55
title: Shaking table test of a 1:10 scale two-span rocking bridge with free-standing columns
title: in Characterizing the free-vibration response of a two-bay rocking bridge with free-standing columns

description: Replacing traditional emulative connections of precast elements for accelerated bridge construction (ABC) with simpler discontinuities can let to more resilient structures with reduced expected damages and economic impacts after strong seismic events. This paper comprises novel shake-table tests of a 1:10 scale two-span rocking bridge with free-standing columns with proper geometrical and dynamic similarity and traditional construction materials. To excite the bridge uniformly, the experimental protocol consisted of forty-nine incremental sinusoidal ground motions that were interrupted, letting the bridge to vibrate freely to rest. The experimental results were compared with six analytical models. The results show that the structure remained undamaged after drifts as large as 6%, and did not wobble unrestricted, even though the excitations were unidirectional. Additionally, construction imperfections induced the model to rock for all excitations, including low intensity excitations, and to vibrate with periods largely divergent from theoretical equations at low displacements. This behavior took a critical role as well in the comparison between the experimental results and the estimates from the analytical models. These findings support the capacity of rocking bridges to reduce damage during seismic events despite the variability of the behavior and highlighted the need to consider possible imperfections expected at construction conditions.
description: Shake-table tests of a 1:10 scale two-span rocking bridge with free-standing columns with proper geometrical and dynamic similarity and traditional construction materials. To excite the bridge uniformly, the experimental protocol consisted of forty-nine incremental sinusoidal ground motions that were interrupted, letting the bridge to vibrate freely to rest.
DOI: 10.17603/ds2-e0w5-zh88
title: Report
title: in Examining Organizational Disruption and Recovery Post Hurricane Harvey in Southeast, Texas

description: To gather more in-depth information about how disasters affect businesses and nonprofits, the National Institute of Standards and Technology (NIST) and the National Oceanic and Atmospheric Administration (NOAA) launched a study of business disruption and recovery related to several recent disasters. The files uploaded in this projec includes the report that outlines the survey instrument used as the basis for the research designed and conducted in partnership between Texas Sea Grant and the Texas A&M University Hazard Reduction and Recovery Center (HRRC), NIST Applied Economics Office (AEO), and the NOAA Regional Integrated Sciences and Assessment (RISA) Program. Addittionally, the project contains the field guide used to administer the survey and collect data and a preliminary findings report.  This research protocol uses a mixed-method research approach to study businesses and nonprofit organizations that were impacted by Hurricane Harvey in 2017 and their long-term recovery process. The approach combines both quantitative and qualitative data collection methods of in-person and telephone surveys to obtain organizational disruption and recovery information from organizational owners and managers.
description: TBD
DOI: 10.17603/ds2-d689-jr55
title: Structural Dynamics Through the Lens of 3-D Printing
title: in 3D-Printing Dynamics Design (3D3) Competition – Fall 2022

description: The 3D-printing Dynamics Design (3D3) Competition intends to train School of Civil Engineering & Environmental Science (CEES) undergraduates at the University of Oklahoma in fundamental concepts related to vibrations, structural dynamics, and earthquake engineering through a semester-long, hands-on competition run in parallel with Introduction to Dynamics for Architectural and Civil Engineers (CEES 3263). Competition participants, or 3D3 Scholars, design, build, and test a bench-scale shake table using 3D-printed components. The designs of these shake tables are published here, along with all the STL files needed for teachers or students elsewhere to fabricate the tables. Also, the data collected during the challenges is published.
description: This report explores the topics of dynamics with a focus on structures and 3-dimensional printing. With the first challenge, angular velocity and acceleration were the focus. The second challenge involved the ideas of converting rotational motion into linear motion. However, a target frequency and acceleration meant that an equation needed to be derived in order to gage the magnitude of the dimensions necessary to achieve this target. The final challenge required the employment of material properties and displayed the inaccuracies of the 3-D printer. Not only were topics important to dynamics highlighted through these challenges but diving further into the intricacies of 3-D printing was a large portion of experimentation and learning.
DOI: 10.17603/ds2-rhd5-y052
title: Experimental testing of seven RC shear walls under quasi-static cyclic loading
title: in Investigating the behavior of nonconforming RC shear walls with smooth bars in old and existing buildings

description: In this project, an experimental investigation is conducted to determine the behavior of RC shear walls found in old and existing buildings that do not comply with the design rules in modern earthquake standards. Many studies indicated that most of the damaged buildings after earthquake events were built with low concrete quality and smooth bars. Seven full-scale reinforced concrete (RC) shear wall samples are built and prepared within the scope of this project. The behavior of the shear walls is determined experimentally by displacement-lateral load relationship under lateral cyclic loading. The study used measurable parameters to investigate the behavior of the test specimens in terms of lateral force capacity, rigidity, ductility, dissipated energy, and displacement component's contribution to the total lateral response of the walls. As a result, it is proven in this work that these specimens are governed by the bar slip phenomena, which demonstrated more than 80% contribution to the total lateral displacement capacity. In contrast, the reference shear wall exhibited a notable flexural behavior and plastic hinge formation. Additionally, the shear walls built with smooth reinforcement bars lost about 44% of their theoretical potential flexural capacity due to the observed bar slip failure.
description: This experimental investigation is conducted to study the behavior of 7 full-scaled reinforced concrete shear walls. Six (6) specimens were used to represent existing structures that do not comply with the design rules in current earthquake standards (nonconforming shear walls, NCSW). And, one (1) wall was used as a reference specimen designed in accordance with recent building codes (TBDY2018) using deformed bars. The experiment is performed under quasi-static loading, considering the properties of buildings in Turkey built before 1997. The dimensions of the shear wall specimens were selected with an aspect ratio bigger than two as Hw=2500 mm for the height, Lw=1050 mm for the length, and thickness as bw=150 mm, by taking into account the laboratory capacity and the pre-study results.

The reference test wall (CSW0) had well confined columns in the boundary zone using 100 mm spaced ties, and transverse steel with 200 mm spacing. Three of the nonconforming specimens (NCSW1, NCSW3, and NCSW4) used the same reinforcement steel configuration in the section as the reference wall, with concentrated boundary zone steel (CBZS) and the same bar diameters (12 mm for the boundary zone, and 8 mm in the web). The difference was the use of smooth bars for longitudinal and transverse reinforcing steel, and non-confined BZ. The other three nonconforming specimens (NCSW2, NCSW5, and NCSW6) used distributed longitudinal 8 mm smooth steel reinforcement bars.
DOI: 10.17603/ds2-8f4j-8c58
title: Jupyter notebook for hazard, exposure, and reconnaissance data integration and visualization

description: The purpose of this JupyterLab is to integrate field damage, hazard, and exposure data from past hurricane events. KeplerGl provides customizable geospatial map visualization and user-friendly analysis tools. Different kinds of data from different sources related to any hurricane event are collected.  The exposure data from the National Structure Inventory (NSI) database and flood data from U.S. Geological Survey (USGS) are both collected via an application programming interface or API.  API is storage-friendly and updates automatically. In that case, the script connects to the service provider. The field damage reconnaissance data from Structural Extreme Events Reconnaissance (StEER) is available from both DesignSafe and Fulcrum without an API, whereas the wind field data from the Applied Research Associates, Inc. (ARA) wind grid is on DesignSafe.
DOI: 10.17603/ds2-a6hb-8940
title: StEER 2024 Houston Derecho Joint Preliminary Virtual Reconnaissance Report and Early Access Reconnaissance Report (PVRR-EARR)
title: in StEER- 2024 Houston Derecho

description: In the evening of May 16, 2024, severe storms developing in southeast Texas evolved into a derecho that moved into the greater Houston area. The derecho was accompanied by heavy rainfall and two confirmed EF-1 tornadoes in Texas. Nearly one million people lost electricity and over 120 schools in the Houston Independent School District reported loss of power. The City of Houston estimated that nearly 1.5 billion cubic yards of residential storm debris from fallen trees was created, which has still not been totally removed at the time of this report. This Joint Preliminary Virtual Reconnaissance Report-Early Access Reconnaissance Report (PVRR-EARR) is StEER’s second product from this event and provides an overview of the Houston derecho and initial impression from field observations gathered by a University of Houston-based Field Assessment Structural Team (FAST).
description: This project encompasses the products of StEER's Level 1 response to this event: Preliminary Virtual Reconnaissance Report (PVRR) with corresponding Media Repository.
DOI: 10.17603/ds2-cbne-v126
title: Tsunami Debris Motion and Loads in a Scaled Port Setting: Comparative Analysis Data for STAR-CCM+ Computational Fluid Dynamics
title: in Tsunami Debris Motion and Loads in a Scaled Port Setting: Comparative Analysis Data for Three Numerical Methods

description: Data repository for "Tsunami debris motion and loads in a scaled port setting: Comparative analysis of three state-of-the-art numerical methods against experiments" by Bonus et al. 2025: 
https://doi.org/10.1016/j.coastaleng.2024.104672

Repository includes scaled, 3D tsunami debris simulation results in three numerical methods: the Material Point Method (MPM, ClaymoreUW), Smoothed Particle Hydrodynamics (SPH, DualSPHysics), and Eulerian grid-based computational fluid dynamics (CFD, Simcenter STAR-CCM+). This data repository contains results on the long wave generation from a vacuum-controlled tsunami wave maker, longitudinal displacement of debris forward and back, lateral spreading angle of debris, interactions of stacked debris, and impact forces measured with debris accelerometers and/or obstacle load-cells for the digital flume models of each respective numerical method.

The comparative analysis is done for a benchmark set at 1:40 Froude scale to model experiments of shipping containers mobilized into and amidst a port setting with simplified and generic structures, closely related to the seminal Tohoku 2011 tsunami case histories which majorly affected seaports. A wave flume at Waseda University in Tokyo, Japan, hosted the experiments as reported by Goseberg et al. 2016 (https://doi.org/10.1016/j.coastaleng.2016.08.012). Across dozens of trials, an elongated vacuum-chamber wave surges and spills over a generic harbor apron, mobilizing 3–6 hollow debris-modeling sea containers-, in 1–2 vertical layers against friction. One to two rows of 5 square obstacles are placed upstream or downstream of the debris, with widths and gaps of 0.66x and 2.2x of debris length, respectively.

The data repository is intended for inclusion in further comparative analysis efforts that study the efficacy of numerical methods and software for tsunami debris modeling.
description: The finite volume method (FVM) and Volume of Fluid (VoF) method were applied in a comparative analysis study to replicate stochastic wave flume experiments on tsunami debris motion and loads in a scaled port setting. Simcenter STAR-CCM+ was the software used. Configuration files for the digital flume's specification per experimental case are contained along with their corresponding output files (e.g., wave-gauges, load-cells, debris-trackers).