Hybrid Simulation of Small-Scale Steel Braced Frame Subjected to Fire and Fire Following Earthquake

Memari, Mehrdad; Wang, Xuguang; Mahmoud, Hussam; Kwon, O’Dae

doi:10.1061/(asce)st.1943-541x.0002466

Cited by 12 publications

(4 citation statements)

References 32 publications

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“…A hybrid simulation framework was developed and illustrated with a test of a small-scale specimen (Memari et al, 2020). The four-story special concentrically braced frame (SCBF) building was 5 ft × 5 ft in plan, with four bays in each direction.…”

Section: Multi-hazard Simulation and Testingmentioning

confidence: 99%

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Steel Structures Research Update: Structural Fire Engineering

Liu

2021

Eng J

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Across the United States, researchers are making exciting discoveries and advances in structural fire engineering. Eleven of the leading scholars in the field are featured. Brief research highlights are organized by the topic areas of behavior and design of steel and composite structures for fire, fire following earthquakes, and performance-based fire engineering. For each individual, related steel and fire research is also noted. Meanwhile, due to timing and circumstances, there are structural fire engineering researchers who do not appear in this article. You may find some of their structural steel research in past articles or perhaps a future research update.

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Section: Multi-hazard Simulation and Testingmentioning

confidence: 99%

“…The level of residual interstory drift proved to be a significant factor in the fire performance of the column. Additional details and commentary on future studies can be found in Memari et al (2020). (Quiel and Garlock, 2010).…”

Section: Multi-hazard Simulation and Testingmentioning

confidence: 99%

Steel Structures Research Update: Structural Fire Engineering

Liu

2021

Eng J

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“…In the purely numerical configuration, however, the behaviour of the fire-exposed part must be modelled analytically too, which introduces uncertainty to the results (mainly because of the lack of realistic temperatureand time-dependent calibration data for the constitutive material models), that is, by design of the method eliminated in the hybrid configuration. For this reason, hybrid testing has lately attracted the interest of several researchers in structural fire engineering, leading to numerous conference contributions [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] and several different approaches [32][33][34][35][36][37][38][39][40][41]. However, a detailed and methodical review of existing approaches in [42] shows that these contributions still have, in aggregate, the following drawbacks: (1) they either lack the necessary theoretical rigour or ignore fundamentals of the well-established hybrid testing method as founded in the field of earthquake engineering (refer to [43] for an excellent review of these principles); (2) or they were only verified using over-simplified laboratory experiments, during which only relatively low elevated temperature levels were reached and, therefore, did not cover the entire range of temperaturedependent material behaviours that are relevant in structural fire engineering problems; or (3) they directly attempted to set up a hybrid fire test with full-scale structural members before exploring the fundamentals through meaningful lab-scale proof-of-concept problems (refer to [42] for a more detailed discussion including a historical overview on pioneering research from the 1980s and 1990s).…”

Section: Introductionmentioning

confidence: 99%

Validating hybrid fire testing with full-physical twin experiments

et al. 2022

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Real fire incidents show that structural systems have specific fire-induced redundancies that make them perform better than classical structural fire analysis predicts. Properly validated hybrid fire testing has the potential to tap into such redundancies for designs. In this study, we conceived and implemented a comprehensive and novel physics-based validation strategy for hybrid fire testing. We developed a laboratory-scale thermo-mechanical proof-of-concept problem that is representative for structural systems exposed to compartment fires. We solved the proof-of-concept problem using our novel thermo-mechanical hybrid solution procedure (Schulthess et al. 2020 Comput. Struct. 238 , 106301 ( doi:10.1016/j.compstruc.2020.106301 )) and compared the resulting hybrid model response against the results from a full-physical laboratory set-up of the same proof-of-concept problem, which we call a full-physical twin experiment. Full-physical twin experiments constitute the top layer of a suite of benchmark tests any specific hybrid fire testing procedure must pass to qualify not only as theoretically accurate and correctly functioning but also (and more importantly) as physically sound and able to yield realistic simulation results. This paper delivers such a first-of-its-kind physics-based validation, and in doing so, the first comprehensively validated method for hybrid fire testing—a method that now allows fire test facilities to conduct meaningful full-scale hybrid fire tests of entire structural systems.

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“…During the hybrid test, the numerical model for the soil-structure interaction (SSI) of the bridge was also included. Furthermore, the philosophy of hybrid simulation has not been limited to structural and earthquake engineering, but it was extended to other areas of study such as thermo-mechanical testing, industrial piping systems and multihazard testing [7][8][9]. It also motivated small laboratories to actively engage in research using their limited equipment, including participation in geographically distributed hybrid testing projects.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of an integrated software framework for hybrid simulation

Tekeste

Correia

Costa

2022

Preprint

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Hybrid simulation combines numerical and experimental techniques to simulate the response of structures. In the last two decades, notable developments have been made to make hybrid testing platforms modular and versatile. The OpenSees-OpenFresco software framework for hybrid simulation is a typical example which can interface with various control software and hardware. This paper presents the development of a robust integrated hybrid testing software framework at the National Laboratory for Civil Engineering, Portugal, which uses the National Instruments real-time and FPGA hardware. The software framework has a LabVIEW-based control and interface application for conducting hybrid tests using OpenFresco middleware. The OpenSees finite element software is also integrated into the framework and communicates with the middleware via a TCP/IP protocol. The software framework is designed to conduct slow to real-time hybrid tests assisted by a predictor-corrector algorithm which enables continuous movement of an actuator. It is also equipped with error tracking and delay compensation algorithms. New simulation tools can be simply added to it due to its modular and flexible nature. The capabilities of the software framework are first examined through simulated hybrid tests. It is then validated by conducting hybrid test of a two-bay one-story steel moment-resisting frame by physically testing one of its exterior columns.

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Hybrid Simulation of Small-Scale Steel Braced Frame Subjected to Fire and Fire Following Earthquake

Cited by 12 publications

References 32 publications

Steel Structures Research Update: Structural Fire Engineering

Steel Structures Research Update: Structural Fire Engineering

Validating hybrid fire testing with full-physical twin experiments

Development and validation of an integrated software framework for hybrid simulation

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