A simplified method to assess seismic behavior of reinforced concrete columns

Wang, Zhen; Wang, Jingquan; Zhu, Jian Feng; Zhang, Jian

doi:10.1002/suco.201800223

Cited by 13 publications

(4 citation statements)

References 34 publications

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“…Robust estimation of the earthquake-induced losses at the structure-and community-level is an essential element of the seismic risk assessment and crucial for decision-makers. [1][2][3][4][5][6][7] The performance-based probabilistic seismic loss estimation frameworks available in the literature, that is, FEMA P-58, 8 include distinctive components associated with seismic hazard analysis, structural analysis, damage identification, and direct and indirect loss analysis. Such probabilistic model-based methodologies estimate an engineering demand parameter (EDP) as a structural response to an earthquake scenario with a known intensity measure (IM).…”

Section: Introductionmentioning

confidence: 99%

Vision‐based probabilistic post‐earthquake loss estimation for reinforced concrete shear walls

Azhari,

Hamidia,

Rouhani

2024

Structural Concrete

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In this paper, a probabilistic methodology based on image analysis is proposed for earthquake‐induced loss estimation in rectangular reinforced concrete shear walls (RCSWs) in compliance with FEMA P‐58. The methodology is developed using a databank of 285 surface crack patterns gathered from the result of experimental research on 99 rectangular RCSWs with wide‐ranging structural and geometric characteristics. For the complexity extraction, three fractal geometry indices of the damaged specimens are taken into consideration. Fragility functions are generated to determine the probability of exceeding a FEMA P‐58 compliant damage state based on the various methods of repair for specific complexity indices. The fragility functions are obtained using four common probabilistic distributions including lognormal, Weibull, gamma, and beta. The fitness of the fragility curves is examined by two goodness‐of‐fit tests, namely the Kolmogorov–Smirnov test and Lilliefors test. Results show that the Weibull is the best‐fitting distribution for the majority of damage states and succolarity possesses the best results in goodness‐of‐fit tests among fractal geometry indices. Empirical loss indices are also derived in this paper aimed at optimizing the goodness‐of‐fits. Finally, the proposed procedure is utilized for a sample specimen from the databank at various damage levels.

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Section: Introductionmentioning

confidence: 99%

Vision‐based probabilistic post‐earthquake loss estimation for reinforced concrete shear walls

Azhari,

Hamidia,

Rouhani

2024

Structural Concrete

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“…7 Zero-length springs are applied at the fixed ends of the columns to simulate the slip and shear deformations. 4,[8][9][10][11][12] For the proposed computational model, an open-source software, Open System for Earthquake Engineering Simulation (OpenSees) 13 is used in this study. OpenSees provides users a wide range of library for modeling and structural analysis.…”

Section: Introductionmentioning

confidence: 99%

“…The expected column behavior is determined based on its design and material properties, which are used to categorize columns by calculating the shear, yield and flexural strengths 7 . Zero‐length springs are applied at the fixed ends of the columns to simulate the slip and shear deformations 4,8‐12 …”

Section: Introductionmentioning

confidence: 99%

Cyclic Displacement Model for Reinforced Concrete Columns

Bicici

Sezen

2022

Earthq Engng Struct Dyn

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Reinforced concrete (RC) structures in low to moderate seismic regions and many older RC structures in high seismic regions include columns with steel reinforcement details not meeting the requirements of modern seismic design codes. These columns typically fail in shear or in a brittle manner and their behavior must be accurately captured when RC structures are modeled and analyzed. The total lateral displacement of a low ductility or shear critical RC column can be represented as the sum of three displacement components: (1) flexural displacement, (2) displacement due to slippage of the reinforcing bars at column ends, and (3) shear displacement. In this study, these three displacement components are separately modeled and then combined together following a proposed procedure based on the expected overall behavior of the column and its failure mechanism. A simplified slip model is proposed. The main objective of this research is to develop an easy‐to‐apply method to model and capture the cyclic behavior of RC columns considering the shear failure mechanism. The proposed model is validated using the available data from RC column and frame experiments.

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“…Tang [15] developed a modified method for strength and stiffness calculation of fabricated concrete shear wall models based on the bending calculation theory and established its restoring force mathematical model. Wang et al [16] developed a simplified method to assess the seismic behavior of reinforced concrete columns that failed in different modes. Zou et el.…”

Section: Introductionmentioning

confidence: 99%

A Restoring Force Model for Prefabricated Concrete Shear Walls with Built-In Steel Sections

et al. 2021

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Prefabricated shear walls have been widely used in engineering structures. Vertical connection joints of the walls are the key to ensure the safety of the structures. Steel–concrete composite structures have been proved to have a good bearing capacity and ductility. In this paper, a new type of prefabricated structure is proposed, in which vertical wall members are connected together through built-in steel sections and cast-in-place concrete. This paper studies the seismic performance of the proposed prefabricated concrete shear wall structure. Hysteretic curves and skeleton curves of the shear wall are obtained based on experimental analyses. A dimensionless skeleton curve model is developed using the theory of material mechanics and the method of regression analysis. A stiffness calculation method for different loading stages is obtained and a restoring force model is proposed. The proposed innovative prefabricated shear wall structure provides good resistance to seismic performance and the related analysis provides a fundamental reference for studies of prefabricated shear wall structures.

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A simplified method to assess seismic behavior of reinforced concrete columns

Cited by 13 publications

References 34 publications

Vision‐based probabilistic post‐earthquake loss estimation for reinforced concrete shear walls

Vision‐based probabilistic post‐earthquake loss estimation for reinforced concrete shear walls

Cyclic Displacement Model for Reinforced Concrete Columns

A Restoring Force Model for Prefabricated Concrete Shear Walls with Built-In Steel Sections

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