Study on shear behavior and capacity of biaxial ellipsoidal voided slabs

Khouzani, Mohsen Amoushahi; Zeynalian, Mehran; Hashemi, Mahmoud; Mostofinejad, Davood; Farahbod, Farhang

doi:10.1016/j.istruc.2020.07.017

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…The drawbacks of hollow slabs are also obvious. For traditional hollow slabs, hollow slabs can affect their bending and shear resistance performance [15][16][17][18][19][20][21]. Azad et al [22] conducted experiments to investigate the impact of the hollow ratio on the bending and shear-bearing capacity of hollow slabs.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of the Structures Using Glass-Fiber-Reinforced-Polymer-Produced Hollow Internal Molds

Zhang,

Yang,

et al. 2024

Buildings

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Hollow structures reduce weight without compromising load-bearing capacity and are widely used. The new Glass-Fiber-Reinforced Polymer high-strength thin-walled inner mold simplifies internal cavity construction and boosts structural performance. This study first investigates the influence of a GFRP high-strength thin-walled circular tube on the cross-sectional load-carrying capacity of hollow slabs. Then, a formula for the bending load-carrying capacity of the section under the action of the tube is derived. The results indicate that when the height of the concrete compression zone meets certain conditions, GFRP high-strength thin-walled circular tubes can improve the ultimate load-carrying capacity of the hollow floor slabs. In order to achieve a more economical design, the bending moment modification of a GFRP high-strength thin-walled circular tube of a continuous slab was studied. Research has found that the bending moment modulation limit for a continuous slab is 35.65% when it is subjected to a load of Pu=24 kN. Experimental analysis has shown that the results are generally consistent with the calculations. In practical engineering, the application of a GFRP high-strength thin-walled circular tube of continuous slabs has limitations. Therefore, this study investigated a GFRP high-strength thin-walled honeycomb core slab and found that its ultimate load-bearing capacity is greater compared to waffle slabs. In addition, the stress performance of the GFRP high-strength thin-walled honeycomb core internal mold is superior, making it more promising for practical applications.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of the Structures Using Glass-Fiber-Reinforced-Polymer-Produced Hollow Internal Molds

Zhang,

Yang,

et al. 2024

Buildings

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“…The other technique to reduce the weight is to create intentional voids in the cross-section of the slabs. Several void shapes; donut [18][19][20], spherical [21][22][23][24][25][26][27][28], cuboid [1 and 28-31], ellipsoidal [27,32,33], flat void [21] etc. were used and several configurations (discrete void, continuous void etc.)…”

Section: Introductionmentioning

confidence: 99%

The Effect of Voids on Flexural Capacity of Reinforced Concrete Slabs

Kıpçak

Erdil

Karaşin

2023

Period. Polytech. Civil Eng.

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The voided reinforced concrete slab system is mainly produced with polyester foam placed mostly at the bottom of the slab. The aim of the voids is to reduce the weight of the slab. In this paper behavior of the voided reinforced concrete slabs in which voids placed at the mid-height of the slab cross-section, is examined analytically. A series of models were created to come up with a lightweight slab. Two distinct slab models were analyzed using the ABAQUS software. In the first group, slabs had three layers, in which bottom and top layers were of solid reinforced concrete, but the mid layer was of voided unreinforced concrete. In the second layer, in order to increase the contact between top and bottom layers of the slab, crossties were utilized, and the mid layer was reinforced accordingly. Since all the layers were 5 cm thick, the total thickness of the slabs were 15 cm. Slabs were 100 cm wide and 200 cm long. They were simulated the three-point bending test. Concrete damaged plasticity material model (CDPM) for concrete and elastoplastic material model for steel was selected. From the results it was found that moment capacity decreased with the increase in the volume of the voids. There was a sudden decrease in strength after reaching the yield strength in voided slab without a crosstie. In addition, crossties enabled the reduction of the weight of the slabs without significant decrease in moment capacity.

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“…Recently, a structure system with a reinforced concrete hollow floor has been widely used in practical engineering [1,2]. It is well known that structural control techniques are intended to mitigate structure responses under ambient dynamic excitation in consideration of the safety and serviceability issues of structures [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Time Domain Damage Identification Approach of the Newly Hollow Floor Structure with TRMD

Mao

Yin

et al. 2022

Applied Sciences

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A tuned rolling mass damper system (TRMD) is newly combined with structural hollow slabs to act as an ensemble passive damping device to mitigate structural responses. The main advantage of this controlled configuration lies in its capacity to maintain architectural integrity. To investigate damage identification of this controlled structure with TRMD, a time domain identification approach with sensitivity-based model updating is studied in this paper. The simplified model and motion equation of a controlled structure with TRMD are derived considering the interaction force between the main structure and the damper. Furthermore, the dynamic response and dynamic response derivatives with respect to elemental variations in the controlled structure are analyzed to identify damage by minimizing the response difference between the intact state and the damaged state in the sensitivity-based updating procedure. A numerical example for a six-story frame structure with a TRMD on the top is employed to verify that not only the structural dynamic responses are controlled effectively by the rolling ball damper subjected to the earthquake excitation, but also damage location and extent can be identified accurately by the proposed method even with measurement noise considered. The shaking table test of a single-story frame equipped with TRMD is additionally carried out to validate the accuracy of the proposed structural damage identification method in the laboratory.

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Study on shear behavior and capacity of biaxial ellipsoidal voided slabs

Cited by 11 publications

References 6 publications

Performance Analysis of the Structures Using Glass-Fiber-Reinforced-Polymer-Produced Hollow Internal Molds

Performance Analysis of the Structures Using Glass-Fiber-Reinforced-Polymer-Produced Hollow Internal Molds

The Effect of Voids on Flexural Capacity of Reinforced Concrete Slabs

Time Domain Damage Identification Approach of the Newly Hollow Floor Structure with TRMD

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