Continuous Real-Time Hybrid Simulation Method for Structures Subject to Fire

Wang, Xuguang; Kim, Robin E.; Kwon, Oh‐Sung; Yeo, In-Hwan; Ahn, J. S.

doi:10.1061/(asce)st.1943-541x.0002436

Cited by 22 publications

(8 citation statements)

References 15 publications

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“…Among the aforementioned research, the authors in [21,22] proposed and conducted an automated displacement controlled hybrid fire simulation on a full-scale steel specimen subject to high temperature. Using the reference structure described in Figure 1 and section properties listed in Table 1, the middle column on the first floor (element ID #9) was replaced with physical columns in full-scale and tested in a furnace.…”

Section: Experimental Calibration On Fem Approaches (Hybrid Simulation)mentioning

confidence: 99%

“…Because the test was conducted for the entire structure, the connection movement (behavior) between the column and the rest of the structure was also stored in the database. In this paper, as a benchmark problem, the datasets from Wang et al [21,22] are used to develop a methodology for assessing the integrity of the structure.…”

Section: Experimental Calibration On Fem Approaches (Hybrid Simulation)mentioning

confidence: 99%

“…Thus, from the hybrid simulation conducted in [21,22], specimen displacement and reaction forces are calculated (see Figure 1 for the reference structure and Figure 2 for the full-scale specimen and test setup). Here, because the displacement reading directly obtained from the actuator side contains not only deformations of the specimen but also that of the reaction frame, the displacement of only the specimen has been calculated from the estimated stiffness of the reaction frame.…”

Section: Calibration Of the Measured Temperaturementioning

confidence: 99%

“…The result from the optimization is described in Figure 3 by comparing the measured displacement and optimized displacement. Note that the measured displacement is obtained during the hybrid fire test in [21,22]. During a hybrid simulation, the temperature of the steel (averaged over the length) was raised up to 733 • C and cooled down, with no global buckle occurring.…”

Section: Calibration Of the Measured Temperaturementioning

confidence: 99%

“…Illustration of problem sets (a) Reference structure layout[21,22]; (b) Zoomed connection to describe the modeled connection behavior.…”

mentioning

confidence: 99%

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The Behavior of a Multi-Story Steel Frame Subject to Measured Fire Using Calibrated Simple Approach

Kim

Piao

2019

Sustainability

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Structural steels are one of the most popular construction materials with a number of merits, such as cost-effectiveness, durability, lightweight, versatility, etc. However, when exposed to a high temperature, their thermal expansion rate is high and the strength reduces substantially, making the steel structures vulnerable to fire. So far, a number of studies have been performed to understand the behavior of steel in fire. Rigorous tests, from the material to structural level, have led the advancement of modeling techniques. Among various analytical techniques, one of the most widely used approaches is the finite element modeling (FEM). While FEM can demonstrate geometrical and material nonlinearities, due to the complexity, the approach may result in high computational loads to ensure the convergence. Thus, in this paper, a simple calculation method is instead used to understand the steel frame subject to fire, in conjunction with experimentally collected temperature and displacement data. Then, at each temperature (before and after critical temperature and the formation of plastic hinges), the effect of elevated temperature on global behavior is examined using frame analysis. Results of the study have demonstrated that when structural integrity is of concern, the critical temperature of the structure must be examined in terms of fundamental characteristics of the structure.

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Section: Experimental Calibration On Fem Approaches (Hybrid Simulation)mentioning

confidence: 99%

Section: Experimental Calibration On Fem Approaches (Hybrid Simulation)mentioning

confidence: 99%

Section: Calibration Of the Measured Temperaturementioning

confidence: 99%

Section: Calibration Of the Measured Temperaturementioning

confidence: 99%

“…Illustration of problem sets (a) Reference structure layout[21,22]; (b) Zoomed connection to describe the modeled connection behavior.…”

mentioning

confidence: 99%

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The Behavior of a Multi-Story Steel Frame Subject to Measured Fire Using Calibrated Simple Approach

Kim

Piao

2019

Sustainability

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Real‐time hybrid simulation for fluid‐structure interaction: Structures under seismic and hydrodynamic forces

Zhou

Zhang

et al. 2023

Earthq Engng Struct Dyn

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A new real‐time hybrid simulation (RTHS) scheme for fluid‐structure interaction to investigate structures subjected to seismic and hydrodynamic forces is proposed. In traditional testing of underwater structures, the conflict between scaled specimen and unscaled water makes only partial similarity laws can be satisfied. In the proposed scheme, the hydrodynamic force is regarded as physical substructure (PS) and the target structure under earthquake is regarded as numerical substructure (NS). In RTHS, the deformation and displacement of NS are calculated and sent to the controller of loading system. Loading system deforms and drives the “skin” that makes the state of “skin” identical to that of NS, and then the hydrodynamic force on structure is measured and fed back to NS by sensors. “Skin” is a shell whose shape is consistent with target structure and sensors are arranged on the “skin” to measure the hydrodynamic force. Due to NS is simulated and PS is experimentally measured, only the similarity laws of hydrodynamic force should be satisfied in experiment, and the conflict of traditional testing can be avoided. For verifying the proposed scheme, five evaluation indexes proposed by a benchmark problem of RTHS and a modified index are used to quantitatively analyze the experimental results. The results indicate that the response of underwater structures under an earthquake can be accurately obtained by proposed RTHS scheme. Moreover, the proposed scheme is not only applicable to still water but also has the potential to be applied to the environment of waves and currents.

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Real-Time and Pseudo-Dynamic Hybrid Simulation Methods: A Tutorial

Kwon

Dertimanis

2022

Conference Proceedings of the Society for Experimental Mechanics Series

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Continuous Real-Time Hybrid Simulation Method for Structures Subject to Fire

Cited by 22 publications

References 15 publications

The Behavior of a Multi-Story Steel Frame Subject to Measured Fire Using Calibrated Simple Approach

The Behavior of a Multi-Story Steel Frame Subject to Measured Fire Using Calibrated Simple Approach

Real‐time hybrid simulation for fluid‐structure interaction: Structures under seismic and hydrodynamic forces

Real-Time and Pseudo-Dynamic Hybrid Simulation Methods: A Tutorial

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