Publications

Displaying 1 - 25 of 57

Uncertainty quantification using Gaussian processes for topographic speed-up factors from CFD simulations

July 31, 2024

Author(s)

Yunjae Hwang, Adam L. Pintar, DongHun Yeo

Computational fluid dynamics (CFD) simulation has become increasingly popular for evaluating the topographic effects on wind fields due to its relative advantage over experimental techniques in accurately generating approach flows and capturing complex

Database-assisted-design facilitating performance-based tall building design

July 17, 2024

Author(s)

Daniel Rhee, Sophie Sisson, Brian Carman, Mehedy Mashnad, DongHun Yeo

In recent years, wind design, particularly for high-rise buildings, has seen a paradigm shift from a code-based descriptive method to a more specific performance-objective-based design. This new approach, known as the Performance-Based Wind Design (PBWD)

Database-Assisted Design: Performance-Based Approach for Dynamically Sensitive Steel Structures

July 11, 2024

Author(s)

Daniel Rhee, DongHun Yeo, Steve Pingree, Sophie Sisson, Eric Heumann, Mehedy Mashnad

This NIST Technical Note presents a User's Manual of the DAD_PBD software for mid- and high-rise steel structures. A Database-Assisted Design (DAD) method for the design of tall buildings that utilizes time-varying aerodynamic pressure data from wind

A Practical Computational Fluid Dynamics Approach for Structural Engineering: Simulation of Approach Flow with Reduced Blockage Ratios

November 2, 2023

Author(s)

Yunjae Hwang, DongHun Yeo

Computational fluid dynamics (CFD) simulations for structural wind engineering applications require a fully developed boundary layer approach flow with horizontal homogeneity and zero pressure gradient for accurate characterization of wind loading on a

Evaluation of DAD_ETABS Procedure and Software for the Design of High-Rise Steel Buildings for Wind

October 3, 2022

Author(s)

Sophie Sisson, Mehedy Mashnad, DongHun Yeo

The National Institute of Standards and Technology has developed advanced Database-Assisted Design (DAD) procedures for the design of structural members subjected to direction-dependent wind loads. Recently, a DAD_ETABS procedure that uses the ETABS

Simulations of Flow Over an Axisymmetric Hill

February 26, 2021

Author(s)

Rikhi Bose, DongHun Yeo

In this report, high-Reynolds number turbulent flow around an axisymmetric hill is studied using large eddy and unsteady Reynolds averaged Navier-Stokes simulations and the results are extensively validated against experiment. The boundary-layer thickness

Aprendiendo de los impactos del huracan Maria en Puerto Rico: Un informe de progreso

January 19, 2021

Author(s)

Joseph Main, Maria K. Dillard, Erica D. Kuligowski, Benjamin Davis, Jazalyn D. Dukes, Kenneth W. Harrison, Jennifer Helgeson, Katherine J. Johnson, Marc L. Levitan, Judith Mitrani-Reiser, Scott J. Weaver, DongHun Yeo, Luis D. Bermudez, Joel Cline, Thomas Kirsch

El 20 de septiembre de 2017, el huracán María tuvo un impacto devastador en gran parte de Puerto Rico, dañando edificios de los que dependían sus comunidades para atención médica, seguridad, comunicaciones, educación, negocios y más. Para comprender mejor

Learning from Hurricane Maria's Impacts on Puerto Rico: A Progress Report

January 19, 2021

Author(s)

On September 20, 2017, Hurricane Maria devastated much of Puerto Rico, damaging buildings that its communities relied upon for medical care, safety, communications, education, business, and more. To better understand failures in buildings and

Numerical simulation of wind-induced mean and peak pressures around a low-rise structure

August 1, 2020

Author(s)

DongHun Yeo, Robert H. Ong, Luca Patruno, Yaping He, Kenny C. Kwok

We performed Computational Fluid Dynamics (CFD) analysis of the low-rise buildings immersed in a turbulent boundary layer. The Silsoe 6 m cube was chosen as the main case study in representing the key features of the typical wind conditions experienced by

A Summary of Industrial Verification, Validation, and Uncertainty Quantification Procedures in Computational Fluid Dynamics

March 24, 2020

Author(s)

DongHun Yeo

Within a variety of CFD applications, their maturity levels can be significantly varied, depending upon e.g., modeling approach and progress of application skills. Recently, CWE (Computational Wind Engineering) has been developed with great attentions from

EQUIVALENT STATIC WIND LOADS VS. DATABASE-ASSISTED DESIGN OF TALL BUILDINGS: AN ASSESSMENT

April 1, 2019

Author(s)

Sejun Park, Emil Simiu, DongHun Yeo

Recent developments in pressure measurement technology, and unprecedented big data capabilities, have enabled the development of Database-assisted Design (DAD), a powerful innovative approach to the design of tall buildings for wind. DAD is accurate

WIND EFFECTS ON A TALL BUILDING WITH SQUARE CROSS SECTION AND MID-SIDE BASE COLUMNS: A DATABASE- ASSISTED DESIGN APPROACH

March 6, 2019

Author(s)

Sejun Park, Dat Duthinh, Emil Simiu, DongHun Yeo

This paper illustrates the application of the Database-Assisted Design (DAD) method to the wind design of high-rise buildings. The paper uses publicly available wind tunnel data and DAD procedures to compare responses to (i) corner winds and (ii) face

Recent and Current Wind Engineering Research at the National Institute of Standards and Technology

September 24, 2018

Author(s)

Dat Duthinh, Jianghua Ke, Marc L. Levitan, Long T. Phan, Adam L. Pintar, Emil Simiu, DongHun Yeo

This paper briefly reviews recent and current National Institute of Standards and Technology (NIST) research aimed at improving standard provisions and advancing structural design practice for wind loads. The research covers: (i) New wind speed maps for

Computational vs. Wind Tunnel Simulation of Atmospheric Boundary Layer Flow for Structural Engineering Applications

September 1, 2018

Author(s)

DongHun Yeo, Liang Shi

ABL simulations using LES have been performed to assess the suitability of the simulated flow for structural wind engineering applications. The governing equations of straight ABL flow for structural engineering purposes were formulated based on state-of

Database-Assisted Design and Equivalent Static Wind Loads for Mid- and High-Rise Structures: Concepts, Software, and Users Manual

June 28, 2018

Author(s)

Sejun Park, Donghun Yeo, Emil Simiu

This report presents the software DAD_ESWL v1.0 capable of computing efficiently the response to wind of mid- and high-rise structures consisting of up to thousands of members. The report also documents the following features of the software: (1) Use of

Introductory Tutorial for DAD: Design Examples of High-Rise Building for Wind

June 28, 2018

Author(s)

Sejun Park, Donghun Yeo

This report presents the introductory tutorials for the use of the software DAD_ESWL v1.0 capable of computing efficiently the response to wind of mid- and high-rise structures consisting of up to thousands of members.

Calibration of Dynamic Pressure in a Tubing System and Optimized Design of Tube Configuration: A Numerical and Experimental Study

June 12, 2018

Author(s)

Matthew Kovaerk, Luke Amatucci, Keith A. Gillis, Florian Potra, James Ratino, Marc L. Levitan, DongHun Yeo

Accurate prediction of aerodynamic pressures on a building is a key factor in the estimation of wind loads on the building. Since the analytical approach has limited capacity in providing pressure estimates, wind tunnel testing is widely used. The

Second-Order Effects on Wind-Induced Structural Behavior of High-Rise Steel Buildings

December 8, 2017

Author(s)

Sejun Park, Donghun Yeo

This paper investigates P-Δ effects on wind-induced structural dynamic behavior of a 60-story high-rise steel structure known as the CAARC building model. These effects are considered in the structural analysis by using a geometric stiffness method

WIND LOAD FACTORS FOR USE IN THE WIND TUNNEL PROCEDURE

December 1, 2017

Author(s)

Emil Simiu, Adam L. Pintar, Dat Duthinh, DongHun Yeo

A 2005 Skidmore Owings and Merrill report notes that the ASCE 7 Standard is incomplete insofar as it provides no guidance on wind load factors appropriate for use with the Standards wind tunnel procedure. The purpose of this paper is to contribute to such

OpenFOAM large-eddy simulations of atmospheric boundary layer turbulence

May 9, 2017

Author(s)

Liang Shi, DongHun Yeo

Reproducing the turbulence statistics of atmospheric boundary layer (ABL) flow in a computer remains a challenge. In this paper, we perform large-eddy simulations of neutrally stratified ABL flow using the open-source toolbox OpenFOAM and examine the

PLANETARY BOUNDARY LAYER MODELING AND STANDARD PROVISIONS FOR TALL BUILDING DESIGN

March 31, 2017

Author(s)

Emil Simiu, N. Alan Heckert, DongHun Yeo

According to recent results of Planetary Boundary Layer research relevant to tall building design, for elevations of up to at least 1 km: (i) the longitudinal mean wind speeds are monotonically increasing with height, and (ii) veering angles are negligible

ITERATIVE DESIGN OF RIGID STRUCTURES FOR WIND USING TIME SERIES OF DEMAND-TO-CAPACITY INDEXES

February 1, 2017

Author(s)

Filmon Habte, Arindam Chowdhury, DongHun Yeo, Emil Simiu

Estimates of wind effects on rigid buildings by database-assisted design (DAD) methods can be far more accurate than those based on information available in standards. An upgraded version of DAD is presented that streamlines the wind engineering/structural

OpenFOAM large-eddy simulations of atmospheric boundary layer turbulence for wind engineering applications

November 29, 2016

Author(s)

Liang Shi, Donghun Yeo

Statistical properties such as the spectral density and spatial coherence of boundary layer turbulence affect bluff body aerodynamics and structural responses. In this report, the open-source toolbox OpenFOAM is employed to perform LES simulations of

A practical verification and validation approach for Computational Wind Engineering simulations using an experimental design technique

November 23, 2016

Author(s)

R?onn Mac R?oinn, DongHun Yeo

Understanding the sensitivity of computational wind engineering (CWE) solutions to simulation parameters facilitates the development of useful solutions. The traditional approach adopted in other fields through verification and validation (V&V) with well

Database-assisted Design and second-order effects on the wind-induced structural behavior of high-rise steel buildings

October 31, 2016

Author(s)

Sejun Park, Donghun Yeo

This work presents an investigation into second-order effects on the wind-induced structural dynamic behavior of high-rise steel structure, as considered within a Database-assisted Design (DAD) context. A geometric stiffness method that accounts for second

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