Seismic Performance of Nonductile Reinforced Concrete Frames with Masonry Infill Walls—I: Development of a Strut Model Enhanced by Finite Element Models

Sattar, Siamak; Liel, Abbie B.

doi:10.1193/90914eqs139m

Cited by 47 publications

(20 citation statements)

References 39 publications

(89 reference statements)

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“…To reduce the computational burden associated with the HSA approach used in this study, future studies may explore the viability of other computationally efficient approximate methods as surrogates for performing NRHA, such as cloud‐based multiple‐linear regression, first‐order second moment (FOSM), response surface method, or other approximate reliability‐based methods. Moreover, in line with the common trend in analytical model development, updated versions of the ST09 and SL10 infill strut models have been developed by the respective researchers recently, which could be included in future analyses without loss of generality of the formulation and findings presented in this study.…”

Section: Resultsmentioning

confidence: 99%

Probabilistic seismic demand assessment accounting for finite element model class uncertainty: Application to a code‐designed URM infilled reinforced concrete frame building

Alam

Barbosa

2018

Earthq Engng Struct Dyn

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Summary Reliable and robust probabilistic assessment of structures requires explicit consideration of all relevant sources of uncertainty, both aleatory and epistemic. This paper proposes a formulation to incorporate model class uncertainty in probabilistic seismic demand assessment (PSDA) of structures, where model class uncertainty relates to the use of different structural analysis models used to predict the physical response of structural systems. The application of the proposed formulation is illustrated through the assessment of a recent code‐designed reinforced concrete (RC) frame building with unreinforced masonry (URM) infills, which is a prevalent form of construction worldwide. The model class uncertainty analyzed in this paper is related to the potential selection of one of three state‐of‐the‐art masonry infill strut models. In the application example, nonlinear static pushover (NSP) analyses and tornado sensitivity analyses are performed to identify the important parameters of infill strut models affecting the seismic response of the infilled RC frame. A hybrid stripe analysis (HSA) approach is adopted to perform nonlinear response history analyses (NRHAs) of the example RC frame. To account for relevant sources of uncertainty, latin hypercube sampling (LHS) is used to quantify the minimum number of realizations of model parameters necessary to achieve convergence of the coefficient of variation (COV) of the engineering response parameters assessed. Results of the NRHAs indicate that incorporating model class uncertainty significantly affects the estimation of uncertainties of the drift hazard demand.

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Section: Resultsmentioning

confidence: 99%

Probabilistic seismic demand assessment accounting for finite element model class uncertainty: Application to a code‐designed URM infilled reinforced concrete frame building

Alam

Barbosa

2018

Earthq Engng Struct Dyn

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“…Sattar and Liel (2015) developed a strut model enhanced by FE models to simulate the in-plane seismic response of masonry-infilled RC frames. Static monotonic FE model is used to define the backbone of the struts representing the infill wall in the strut model.…”

Section: Literature Reviewmentioning

confidence: 99%

Development of new nonlinear dynamic response model of reinforced concrete frames with infill walls

Allouzi

Irfanoglu

2018

Advances in Structural Engineering

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The complex behavior of reinforced concrete frames with infill walls under earthquake loads requires a realistic conceptual model that recognizes changes in strength and stiffness occurring during loading. Accordingly, a new hysteresis model is developed in this article for such reinforced concrete frames to investigate the ultimate damage state given a ground motion. Using this model, the infilled frame can be represented as a single-degree-of-freedom system for computationally efficient dynamic in-plane response analysis. A backbone curve is developed first to provide an envelope within which load–displacement paths occur. Then, the load reversal effects are described and integrated into the backbone curve to obtain the hysteresis model. The hysteresis model developed in this article is checked using data from 11 laboratory experiments carried out by other researchers. The applicability of the hysteresis model is also illustrated on a laboratory specimen that was tested by other researchers under base excitation.

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“…However, masonry infill walls could affect the strength, stiffness, and ductility of RC moment frames. Old RC moment frames with masonry infill walls designed only for gravity loads may experience brittle shear failure in columns, resulting in brittle story collapse mechanism (Fiore et al, 2016; Sattar and Liel, 2016a).…”

Section: Introductionmentioning

confidence: 99%

Cyclic behavior of lightly reinforced concrete moment frames with partial- and full-height masonry walls

Han

Lee

2020

Earthquake Spectra

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Existing lightly reinforced concrete (RC) moment frames are vulnerable to earthquakes. The seismic behavior of these frames could be affected by the presence of masonry infill walls. The objective of this study was to investigate the seismic behavior of gravity-designed RC frames having partial- and full-height masonry infill walls. For this purpose, experimental and numerical studies were conducted. Three one-story and one-bay gravity-designed RC moment frames with and without partial- and full-height masonry infill walls were made and tested under cyclic lateral loads. Numerical models for RC moment frames and masonry walls were proposed based on test data. Nonlinear static and incremental dynamic analyses (IDAs) were conducted for three-story RC moment frames with and without partial- and full-height masonry infill walls using the numerical models. Both experimental and numerical studies demonstrated that the masonry-infilled RC frames had larger lateral strength and stiffness than bare RC frames, whereas their drift capacity was less than that of bare frames. The partial-height masonry-infilled RC model frame had the least collapse strength among the frames.

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Seismic Performance of Nonductile Reinforced Concrete Frames with Masonry Infill Walls—I: Development of a Strut Model Enhanced by Finite Element Models

Cited by 47 publications

References 39 publications

Probabilistic seismic demand assessment accounting for finite element model class uncertainty: Application to a code‐designed URM infilled reinforced concrete frame building

Probabilistic seismic demand assessment accounting for finite element model class uncertainty: Application to a code‐designed URM infilled reinforced concrete frame building

Development of new nonlinear dynamic response model of reinforced concrete frames with infill walls

Cyclic behavior of lightly reinforced concrete moment frames with partial- and full-height masonry walls

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