Unified equivalent frame method for flat plate slab structures under combined gravity and lateral loads - Part 1: derivation

Kim, Kang Su; Choi, Sung Mo; Ju, Hyunjin; Lee, Deuck Hang; Lee, Jaeyeon; Shin, Myoungsu

doi:10.12989/eas.2014.7.5.719

Cited by 7 publications

(6 citation statements)

References 24 publications

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“…A number of methods exist to model the nonlinear behavior of RC slabs [23,37,38]. In this research, the equivalent nonlinear shell layered element is employed to model the sections of the slab in the numerical simulation.…”

Section: The Methods Employed To Model the Bubble Deck (Bd) Slabsmentioning

confidence: 99%

“…The existing design codes of practice [21,22] allow employing at slabs in the low to moderate seismic risk zones as a lateral force-resisting structural member. The at slabs are normally used together with the lateral force-resisting structural members like shear walls or Moment-Resisting Frame (MRF) structures [23]. Mohammad et al [24] studied two 3-D RC framed structures designed according to ACI-318-14 and IS 2800-14 codes employing Linear Response History Analysis (LRHA) as well as Non-linear Response History Analysis (NRHA) under an ensemble of 11 near-fault ground motions.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the response modification factor of RC structures constructed with Bubble Deck system

et al. 2018

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Since the concrete material has been eliminated from the locations situated around the middle of the cross-sections of Bubble Decks (BDs), the BD-type slabs are lighter than the traditional slabs. In the recent researches, Response Modi cation Factor (RMF) is generally determined for Reinforced Concrete (RC) structures with Moment-Resisting Frame (MRF) and dual systems. The dual system mainly comprises MRF with Shear Wall (MRFSW) and at slab chie y with BD system. In this study, evaluation of the RMF values of RC structures using BD system was the main concern. The obtained results indicated that lateral strength of buildings increased by increasing the span length to story height ratio (L=H). Besides, the variations of span length and the number of stories had more signi cant e ects than the variation of usage category of building on the RMFs of structures. Furthermore, the e ect of span length was greater than that of the number of stories in determining RMF of an MRF. Finally, amongst the buildings with dual system structures incorporating MRFSW, the low-rise building structures had an RMF equal to 5 and both the mid-rise and high-rise building structures had an RMF of 7.

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Section: The Methods Employed To Model the Bubble Deck (Bd) Slabsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the response modification factor of RC structures constructed with Bubble Deck system

et al. 2018

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“…Furthermore, in the study of Anil et al [11], it is stated that the equations based on the critical perimeter of the slab yield accurate results for slabs without any openings. Several research studies were conducted to estimate the punching shear capacity of reinforced concrete (RC) slabs using Artificial Neural Networks to increase the accuracy of the punching shear equations [10,[12][13][14][15]. It should be noted that studies involving the application of ANN (Artificial Neural Network) to punching shear capacity estimation of RC slabs focused on solid slabs without any openings.…”

Section: Introductionmentioning

confidence: 99%

Empirical Punching Shear Capacity Equation for Reinforced Concrete Two-way Slabs with Openings

Köroğlu,

Anil,

Hatem

2024

Period. Polytech. Civil Eng.

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This study proposes a new equation to estimate the punching shear capacity of Two Way Reinforced Concrete Flat Slab Column (TRFSC) connections with openings. The TRFSC connections with openings in the literature were simulated using the finite element modeling technique. Then, the test results were used to calibrate and verify the finite element model. Next, the number of test data was artificially increased using the finite element model to cover a wide range of critical perimeters. Finally, the effects of several parameters such as the size of the openings in the reinforced concrete slabs, their position, and distance concerning the column on which the punching loading is applied on the variation of punching shear load capacity of TRFSC connections with openings were observed, the results showed that the proposed equation generally gave better results than the several current code equations. For the study used in the verification of the finite element model, it was observed that the ratios of the punching capacity values calculated using the experimental results and the regulations varied between 0.79 and 0.92 on average, and the regulations gave results that were not on the safe side for TRFSC connections with openings. However, with the nonlinear correction coefficient proposed in this study, the ratios of the experimental results and analytically calculated capacity values were calculated as 1.10 on average, and the standard deviation and variant values decreased much more.

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“…We took into account, the characteristics of real rebar, the slip of the reinforcement bar, and the use of nonlinear material models. Research on this topic [1][2][3] already takes into account the effect of concrete cracking using some reducing factor (β), which has been set based on experimental studies, as it is mostly only for linearly elastic numerical tests and independent horizontal loads separated from vertical loads. The primary purpose of this paper is to find a solution for how it is possible to replace a flat slab supported by columns with a column with an equivalent frame, taking into account nonlinear material properties, based on numerical analysis.…”

Section: Introductionmentioning

confidence: 99%

“…The development of finite element technology, but most of all software, in numerical studies of the subject has not brought about a proportional development. There have been few numerical, nonlinear, finite element studies in the literature to date [1,9]. The few modeling procedures have not been compared and verified with the many experimental results available, even for a one-way monotonically increasing quasi-static load.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analyses of Cast-in-situ RC Flat Slab with an Equivalent Frame for Horizontal Loads

Roszevák,

Haris

2023

Period. Polytech. Civil Eng.

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In structural construction practice, the use of reinforced concrete slabs is extremely common due to their structural and economic advantages. An important issue is the study of structural behavior given to horizontal effects. The significance of this is centered not only on the scales caused by wind and construction loads, which are considered to be “normal” i.e., the quasi-static, which is essentially one-way monotonically increasing but also the most researched seismic, i.e., cyclically varying, direction and magnitude effects. The most widespread methods for sizing flat plate slabs to unidirectional, quasi-static horizontal loads are the so-called Equivalent Frame Method and the Effective Beam Width Method. In addition to analytical and basically linear numerical theoretical methods, several laboratory experiments have been performed and published. In this paper, we investigate the behavior of column-supported flat plate slabs against unidirectional, monotonically increasing horizontal loads using an advanced nonlinear numerical modeling method. Numerical models constructed with different geometric dimensions were created with ATENA 3D three-dimensional nonlinear finite element software. In the numerical studies, in addition to the vertical loads in the global sense, the horizontal loads were also taken into account. In our studies, we analyzed the global behavior of the structure, crack propagation, and internal stresses. The results were illustrated on force - displacement diagrams and compared with the results of the laboratory experiments used, thus showing the accuracy and limitations of the numerical modeling procedure. The numerical results were also compared with the results determined on the basis of the equivalent framework models.

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Unified equivalent frame method for flat plate slab structures under combined gravity and lateral loads - Part 1: derivation

Cited by 7 publications

References 24 publications

Evaluation of the response modification factor of RC structures constructed with Bubble Deck system

Evaluation of the response modification factor of RC structures constructed with Bubble Deck system

Empirical Punching Shear Capacity Equation for Reinforced Concrete Two-way Slabs with Openings

Finite Element Analyses of Cast-in-situ RC Flat Slab with an Equivalent Frame for Horizontal Loads

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