Analytical Model for Estimation of Maximum Normal Stress in Steel Beam‐Columns Based on Wireless Measurement of Average Strains from Vibrating Wire Strain Gages

Lee, Hong Min; Choi, Sanghee; Jung, Dong Jo; Park, Hyo Seon

doi:10.1111/mice.12044

Cited by 24 publications

(20 citation statements)

References 57 publications

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“…e vibrating wire strain gauge (VWSG) [16,17] and crack reopening method [18,19] are two kinds of methods to measure the existing prestressed structures. VWSG is a nondestructive technique; however, crack reopening method to detect existing stress is a semidestructive method.…”

Section: Introductionmentioning

confidence: 99%

A Stress Measurement Method for Steel Strands Based on LC Oscillation

Chen

Zhang

et al. 2018

Advances in Materials Science and Engineering

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e prestress loss is one of the main factors affecting the safety of prestressed concrete structure. While the detecting signals like sound and light are difficult to spread in steel strands, there is no effective method for prestress detection of the bonded prestressed steel strands in existing structures yet. In this paper, taking into consideration that the electromagnetic oscillation characteristic can make the signal propagate effectively on the bonded prestressed steel strands, a nondestructive prestress detection method based on the electromagnetic effect to detect oscillation frequency is proposed. In a detection circuit, the steel strands are simulated as an inductance component, in which an induced electromagnetic signal passes through the steel strands to form resonance. And then, a frequency meter is used to detect the oscillation frequency of the resonant circuit. e oscillation frequency is supposed to have relationship with the prestress loading on the steel strands. A section of steel strands with a length of 1.2 m is adopted to test the correlation of stress and oscillation frequency. Both the theoretical and experimental results show that the resonant frequency of the circuit decreases with the increase of the stress of the strand and is linear in a certain range.

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Section: Introductionmentioning

confidence: 99%

A Stress Measurement Method for Steel Strands Based on LC Oscillation

Chen

Zhang

et al. 2018

Advances in Materials Science and Engineering

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“…Researches on structural health monitoring for various structures, including machinery, civil structures, and buildings, have been actively carried out (Park et al., ; Boller, ; Sanayei et al., ; Park et al., ) to ensure the safety of these structures. The safety of a structure is assessed by identifying the state of the structure after installing sensors to measure its responses (Adeli and Saleh, , ; Hampshire and Adeli, ; Park et al., ; Jiang and Adeli, , b; Fisco and Adeli, , b; Lee and Park, ; El‐Khoury and Adeli, ; Lee et al., ; Park et al., ). However, it is difficult to identify the global behaviors of a structure using the measured responses with a limited number of sensors deployed at a structure.…”

Section: Introductionmentioning

confidence: 99%

Model Updating Technique Based on Modal Participation Factors for Beam Structures

Kim

et al. 2015

Computer aided Civil Eng

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This article proposes a model updating technique based on modal participation factors for a beam structure. In this model updating technique, the error functions of the dynamic characteristic differences between measurement and model are generated as the number of modes under consideration and minimized using the multiobjective optimization techniques. A modal influence factor defined by modal participation factors for each mode is presented for the selection of the best solution from among Pareto solutions. The selection rule represented in this article makes it possible to reflect the contributions of each mode on the behavior of a structure. The model is updated using natural frequencies measured in an impact hammer test of a beam structure and the validity of the updated model is confirmed by the strain responses measured from the test. It is found that the bending stiffness of the beam structure as the parameter for model updating can be identified by the proposed techniques. Furthermore, through comparing the models updated by the simple sum model updating and the technique in this research, it is verified that the proposed technique is more appropriate for the model updating.

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“…Sensor-based structural health monitoring (SHM) studies for assessing the safety of building structures are actively ongoing. Research has been carried out at the structural member level [1][2][3] and the entire system level of the building structure [3,4] using various sensors. The results are then applied to real buildings to assess their safety.…”

Section: Introductionmentioning

confidence: 99%

Damage Detection Technique for Cold-Formed Steel Beam Structure Based on NSGA-II

Choi

Park

2015

Shock and Vibration

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Cold-formed steel is uniform in quality, suitable for mass production, and light in weight. It is widely used for both structural and nonstructural members in buildings. When it is used in a bending structural member, damage such as local buckling is considered to be more important than general steel members in terms of failure mode. However, preceding studies on damage detection did not consider the failure characteristics of cold-formed beam members. Hence, this paper proposes a damage detection technique that considers the failure mode of local buckling for a cold-formed beam member. The differences between the dynamic characteristics from vibration-based measurements and those from finite element model are set to error functions. The error functions are minimized by the optimization technique NSGA-II. In the damage detection, the location of local damage and the severity of damage are considered variables. The proposed technique was validated through a simulation of damage detection for a cold-formed steel beam structure example.

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Analytical Model for Estimation of Maximum Normal Stress in Steel Beam‐Columns Based on Wireless Measurement of Average Strains from Vibrating Wire Strain Gages

Cited by 24 publications

References 57 publications

A Stress Measurement Method for Steel Strands Based on LC Oscillation

A Stress Measurement Method for Steel Strands Based on LC Oscillation

Model Updating Technique Based on Modal Participation Factors for Beam Structures

Damage Detection Technique for Cold-Formed Steel Beam Structure Based on NSGA-II

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