Prediction of the load-carrying capacity of reinforced concrete connections under post-earthquake fire

Shishegaran, Aydin; Moradi, Mehdi; Naghsh, Mohammad Ali; Karami, Behnam; Shishegaran, Arshia

doi:10.1631/jzus.a2000268

Cited by 15 publications

(10 citation statements)

References 57 publications

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“…A reinforced concrete beam's ductility can be defined as its ability to withstand inelastic deformation without a reduction in load-carrying capacity before failure [13][14][15].…”

Section: Ductilitymentioning

confidence: 99%

“…Furthermore, voids can be used as a service path for mechanical and electrical work. Di erent con gurations have been formulated to produce voids inside the concrete structural elements such as bubbles [5][6][7][8][9][10][11][12] and pipes [13][14][15]. However, these methods of voids are almost expensive and required complicated formwork to install.…”

Section: Introductionmentioning

confidence: 99%

“…e compressive force is applied to the endpoint of the bentup bars placed under the neutral axis from the top point of the bent-up bars. In 2021, Shishegaran et al [15] used a finite element (FE) model to simulate the performance of RCCs in post-earthquake fires (PEF).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flexural Ductility, Stiffness, and Toughness of New Voided Reinforced Concrete One-Way Slab Using Waste Plastic Bottles

Rajab

Ali

Mahmoud

et al. 2022

Journal of Engineering

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The enhancement of concrete structures’ performance can easily be achieved. However, the main challenge is how to achieve this performance with respect to the economy and sustainability. The aim of this research is to examine the flexural strength, ductility, stiffness, and toughness of RC hollow one-way slabs that are voided by plastic bottles. A new technique of hollowing has been used in this work, where a steel mesh tube was prepared previously and filled manually with blank waste plastic bottles to form a light tube. This technique has some advantages including ease of installation and adequate bonding for the main steel reinforcements. Five RC one-way slabs were cast and tested in the lab to investigate some variables: the presence of hollow, the ratio of reinforcement, and slab thickness. Briefly, a new technique for voids enhances the flexural behavior with less concrete and weight. The ductility is increased by about 100% for the voided specimens for the same section’s thickness. Also, the rotation in supports had been reduced by about 30% when the thickness of voided slab was increased by about 15%.

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“…A reinforced concrete beam's ductility can be defined as its ability to withstand inelastic deformation without a reduction in load-carrying capacity before failure [13][14][15].…”

Section: Ductilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flexural Ductility, Stiffness, and Toughness of New Voided Reinforced Concrete One-Way Slab Using Waste Plastic Bottles

Rajab

Ali

Mahmoud

et al. 2022

Journal of Engineering

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“…The appropriate method of modelling structures should be determined based on the design objectives (Chen and Wang, 2012). For instance, a detailed solid element may be required to capture local buckling (Karami et al , 2021; Naghsh et al , 2021; Shishegaran et al , 2021).…”

Section: Numerical Modelmentioning

confidence: 99%

Improving the robustness of steel frame structures under localised fire conditions

Suwondo

Cunningham

Gillie

et al. 2021

JSFE

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PurposeThe robustness of building structures in a fire has recently drawn wide attention. This study presents the progressive collapse analysis of steel frame building structures under localised fire. The main objective of this study is to propose methods to enhance the structural collapse resistance of such structures in fire.Design/methodology/approachA modelling method was developed and validated against both experimental and analytical studies. Then, a series of robustness analyses were performed to investigate the interaction among the members and the pattern of load distribution within the structures. These analyses show that lateral resistance and load redistribution have a vital role in the robustness of the building. Thus, two approaches have been adopted to enhance the robustness of the focused steel frame during a fire.FindingsIt is found that increased size of floor beams and vertical bracing systems are effective measures in preventing whole structure collapse. The larger beam section is able to prevent catenary action so that the load in the failed columns can safely transfer to the adjacent columns without buckling. On the other hand, the bracing system improves the lateral resistance that can accommodate the lateral force when catenary action occurs in the beam.Originality/valuePrevious studies have focused on the collapse mechanism of steel frame structures. However, the parameters affecting the structural robustness in a fire have not yet been explored. To address this gap, this study adopted numerical modelling to undertake parametric studies to identify effective methods to improve the robustness of such structures under fire conditions.

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“…Numerical analysis is an e ective method to study the mechanical properties of structures [35][36][37][38]. e shear reinforcement mechanism of VPSBs has been investigated via numerical analysis.…”

Section: Introductionmentioning

confidence: 99%

Strengthening Shear Resistance of Beams without Web Reinforcements Using Vertical Prestressed Steel Bars

Liu¹,

Cui

Wang

et al. 2022

Advances in Materials Science and Engineering

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Ensuring the shear capacity of concrete structures is crucial. The vertical prestressed steel bar (VPSB) strengthening method is effective for improving the shear behaviour of concrete structures. Four concrete beams are investigated to reveal the effect of VPSBs on the shear capacity of concrete beams without web reinforcement. Test results indicate that the shear capacity of the test beam strengthened by VPSBs in the beam is significantly increased by more than 95%, and the failure mode of the test beam changes from diagonal tension failure to shear compression failure. Additionally, the results provide insights into the strengthening mechanism of VPSBs, i.e., the shear contribution of the VPSBs can be categorised into two stages. The vertical compressive stress provides shear contribution in the first stage and provides control in terms of crack development; meanwhile, in the second stage, the stirrup action by VPSBs contributes to shear.

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Prediction of the load-carrying capacity of reinforced concrete connections under post-earthquake fire

Cited by 15 publications

References 57 publications

Flexural Ductility, Stiffness, and Toughness of New Voided Reinforced Concrete One-Way Slab Using Waste Plastic Bottles

Flexural Ductility, Stiffness, and Toughness of New Voided Reinforced Concrete One-Way Slab Using Waste Plastic Bottles

Improving the robustness of steel frame structures under localised fire conditions

Strengthening Shear Resistance of Beams without Web Reinforcements Using Vertical Prestressed Steel Bars

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