Decomposition Approach for Damage Detection, Localization, and Quantification for a 52-Story Building in Downtown Los Angeles

Abdelbarr, Mohamed; Massari, Anthony; Kohler, Monica D.; Masri, Sami F.

doi:10.1061/(asce)em.1943-7889.0001809

Cited by 7 publications

(3 citation statements)

References 31 publications

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“…Xu Yan et al [13] extracted dynamic characteristic parameters of bridges using the NExT-ERA method, and they verified the enhanced version of the sparse component analysis method proposed in their paper. Abdelbarr, MH et al [14] utilized the NExT-ERA method to identify modal characteristics of ultra-high-rise office buildings, verified the accuracy of the sub-structure method proposed in the nonparametric identification method outlined in their paper, and facilitated the practical application of the method to structural health inspections of ultra-high-rise office buildings. Guo Zengwei et al [15] extracted modal characteristics of suspension bridges using the NExT-ERA method, examined key parameters in NExT-ERA, and explored the relationship between the identification frequency damping ratio and wind speed based on data from the health inspection system.…”

Section: Introductionmentioning

confidence: 94%

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In Situ Testing and FEM Analysis of Dynamic Characteristics of a Masonry Pagoda under Natural Excitation

Hu,

Zhou,

Wang

et al. 2024

Buildings

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Ancient masonry pagodas hold significant scientific, historical, and cultural importance. However, due to the complexity of masonry materials, structures, and boundary conditions, establishing finite element static and dynamic models for ancient masonry pagodas is highly challenging. This study aimed to explore the dynamic characteristics and finite element numerical simulation methods of ancient masonry pagodas in Yongzhou, Hunan province. It focused on the Huilong Pagoda in Yongzhou, where in situ test experiments under natural excitation are conducted. The SSI and NExT-ERA methods were employed to determine the ancient pagoda’s natural frequencies, vibration patterns, and damping ratios, and to validate the NExT-ERA method. The macroscopic numerical model of the Huilong Pagoda was calibrated using measured results. Subsequently, the NExT-ERA identification results were compared and analyzed with the numerical simulation results of the dynamic characteristics. The results indicate that the first three orders of natural frequencies for the ancient pagoda in the east–west direction are 1.937 Hz, 6.802 Hz, and 21.361 Hz, respectively. Similarly, the first three orders of natural frequencies in the north–south direction are 1.935 Hz, 7.439 Hz, and 21.398 Hz. The results obtained from both methods revealed that the overall structural damping ratio ranges from 0.21% to 2.89%. The numerical model was analyzed using ANSYS, and the first three orders of natural frequencies obtained were highly consistent with the measured values, exhibiting a maximum relative error of 8.54%. The numerical simulation method developed in this study can effectively simulate masonry pagodas.

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Section: Introductionmentioning

confidence: 94%

“…𝜓 = 𝐺𝜓 (14) where 𝑅𝑒 and 𝐼𝑚 are the real and imaginary parts of the complex vector, respectively. Drawing from the aforementioned theory, measured horizontal acceleration response data in the X-and Y-directions from various floors were used as samples.…”

Section: 𝜔 = 𝐼𝑚 𝑠 𝜉 = −𝑅𝑒 𝑠 /|𝑠 | 𝜓 = 𝐺𝜓mentioning

confidence: 99%

In Situ Testing and FEM Analysis of Dynamic Characteristics of a Masonry Pagoda under Natural Excitation

Hu,

Zhou,

Wang

et al. 2024

Buildings

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“…A review was presented by Feng and Feng 23 highlighting various mode shape-based techniques in structural damage identification. A recent study was conducted by Abdelbarr et al 24 on a 52-story real building using a nonparametric identification method, where modal frequencies were used to identify the crack width and other damage details. Recently, Lu et al 25 introduced a rapid identification procedure for seismic damage assessment using time-frequency distribution of input excitation.…”

Section: Introductionmentioning

confidence: 99%

Structural damage quantification in shear buildings using mode shape slope ratio

Roy

2022

Structural Health Monitoring

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Mode shape-based techniques are very popular among researchers since the last two decades and varying levels of success have been achieved towards identifying damage using structural mode shapes. This study presents a novel formulation to establish the expression of damage severity in the form of mode shape slope. The derived closed-form solution directly correlates the percentage damage intensity with the derivatives of the changes in mode shapes in shear buildings, the most common class of civil structures. Numerical experimentation involving a 16-storey two-dimensional shear building has been performed to show the applicability of the proposition in damage quantification. First three mode shapes are used for this purpose. A detailed parametric study comprising of location as well as noise sensitivity has also been carried out to test the robustness of the proposition. Further, the derived expression has been applied to quantify damages in multiple locations. A relatively shorter structure of eight-storey shear building has also been considered to check the efficiency of the proposed algorithm in structural damage quantification. However, if any mode depicts a very low slope value at the damage location, that particular mode could not be used for damage quantification. Finally, an extensive experimental program on a three-dimensional six-storey miniature model of a shear building ensures its practical applicability under real measurement condition in a laboratory environment. Therefore, this novel mode shape slope-based damage quantification technique can be widely applicable to be appropriate for various circumstances.

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Structural Identification and Monitoring for the Skyway Span of the San Francisco-Oakland Bay Bridge

Abdelbarr,

Wahbeh,

Masri

2024

Lecture Notes in Civil Engineering

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Decomposition Approach for Damage Detection, Localization, and Quantification for a 52-Story Building in Downtown Los Angeles

Cited by 7 publications

References 31 publications

In Situ Testing and FEM Analysis of Dynamic Characteristics of a Masonry Pagoda under Natural Excitation

In Situ Testing and FEM Analysis of Dynamic Characteristics of a Masonry Pagoda under Natural Excitation

Structural damage quantification in shear buildings using mode shape slope ratio

Structural Identification and Monitoring for the Skyway Span of the San Francisco-Oakland Bay Bridge

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