Extended fragility surfaces for unreinforced masonry walls using vision-derived damage parameters

Asjodi, Amir Hossein; Dolatshahi, Kiarash M.

doi:10.1016/j.engstruct.2022.115467

Cited by 13 publications

(5 citation statements)

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“…The proposed statistical method, the Box‐counting method, contains five major phases; the steps for generating a 3D fragility surface are schematically shown in Figure 13. Note worthing that the main idea of the Box‐counting method was previously published by the authors of the current study 69 …”

Section: Generating 3d Fragility Surfacementioning

confidence: 95%

“…In recent years, several studies investigated image‐based damage features to find a strong indicator that is able to express the state of damaged structural components. For instance, the extent and complexity of crack patterns quantified through fractal theory have been widely used to assess structural integrity 8‐10,69,70 . In particular, Hamidia et al.…”

Section: Introductionmentioning

confidence: 99%

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Three‐dimensional fragility surface for reinforced concrete shear walls using image‐based damage features

Asjodi

Dolatshahi

Burton

2023

Earthq Engng Struct Dyn

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This paper proposes a new data-driven method to generate three-dimensional fragility surfaces for post-earthquake damage assessment of reinforced concrete (RC) shear walls (SWs) using image-based damage features. A research database comprised of 212 images corresponding to 66 damaged reinforced concrete shear walls tested under quasi-static cyclic loads is utilized. The walls are categorized into three damage states defined based on different load points along the backbone curve. Convolutional kernel-based filters are then employed to measure the crack patterns and crushed areas from images of the damaged walls. A set of 360,000 sub-cracks from the 212 images is analyzed using Gaussian mixture modeling to distinguish between shear and flexural cracking. These two types of cracking, along with crushing, are the prominent characteristics used to determine the damage states of the RCSWs. The extracted features of shear and flexural cracking are also compressed into a unique cracking index using the Principal Component Analysis theory for dimensionality reduction. Using the compressed feature of cracking and crushing, a new methodology for generating three-dimensional fragility surfaces, entitled the Box-counting method, is introduced, and the damage surfaces are developed based on visual damage features. The damage surfaces are finally formulated using statistical models or machine learning regression learners. The proposed fragility surface can be used for postearthquake damage state identification, risk assessment, and loss estimation of damaged RCSWs.

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Section: Generating 3d Fragility Surfacementioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Three‐dimensional fragility surface for reinforced concrete shear walls using image‐based damage features

Asjodi

Dolatshahi

Burton

2023

Earthq Engng Struct Dyn

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“…The discrepancies between fragilit curves implied the importance of considering aspect ratio during the fragility analysis. Additional experimentally based fragility curves and performance assessments fo masonry walls with different configurations are available in other studies, for example URM walls [237][238][239], RM shear walls [232], and RM walls with boundary elements o confined masonry walls [240,241]. With the advancement of damage detection technology researchers began exploring the application of such technology for crack detection.…”

Section: Moderate Diagonal Shear Damage (Ds4)mentioning

confidence: 99%

“…The measurement results were further used for the qualitative damage state identification and corresponding fragility function devel opment. Although significant efforts have been devoted to the experimentally based fra gility analysis and performance assessment of masonry walls, no studies are available fo Additional experimentally based fragility curves and performance assessments for masonry walls with different configurations are available in other studies, for example, URM walls [237][238][239], RM shear walls [232], and RM walls with boundary elements or confined masonry walls [240,241]. With the advancement of damage detection technology, researchers began exploring the application of such technology for crack detection.…”

Section: Moderate Diagonal Shear Damage (Ds4)mentioning

confidence: 99%

“…With the advancement of damage detection technology, researchers began exploring the application of such technology for crack detection. Asjodi and Dolatshahi [238] introduced a novel methodology for identifying the post-earthquake damage states of URM walls using visual damage features, in which the various types of cracking and crushing areas were measured. The measurement results were further used for the qualitative damage state identification and corresponding fragility function development.…”

Section: Moderate Diagonal Shear Damage (Ds4)mentioning

confidence: 99%

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Towards Performance-Based Design of Masonry Buildings: Literature Review

Zeng,

2023

Buildings

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Masonry is among the most widely used construction materials around the world. Contemporary masonry buildings are primarily designed to comply with prescriptive building code regulations. In recent decades, performance-based design (PBD) has gained increasing attention and achieved significant success in critical structures or infrastructure systems. Instead of being the first mover, the masonry research and practice community can be a faster follower in response to the design paradigm shift towards PBD for masonry buildings. A reliable performance assessment of masonry buildings is of paramount importance in the PBD framework. To facilitate this, this paper presents an up-to-date comprehensive literature review of experimental and analytical studies with emphasis on their contributions to advancement towards performance assessment of masonry buildings. This review categorized available works into two sub-topics: (1) traditional unreinforced masonry and (2) modern reinforced masonry. In each sub-topic, studies focusing on the structural behaviors of masonry at the component-level (i.e., masonry wall) are discussed first, followed by the building system-level-related studies. Through this literature review, the current state of the art and remaining research gaps are identified to provide guidance for future research needs and to pave the way for implementing PBD in the masonry industry.

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