Performance of fixed beam without interacting bars

Shishegaran, Aydin; Karami, Behnam; Rabczuk, Timon; Shishegaran, Arshia; Naghsh, Mohammad Ali; Khani, Mohammreza Mohammad

doi:10.1007/s11709-020-0661-0

Cited by 28 publications

(12 citation statements)

References 27 publications

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“…In addition, the tensile strength of concrete is improved significantly. The tensile strength of various types of concrete was calculated based on previous studies (Li et al, 2009;Chandramouli et al, 2010;Shishegaran et al, 2020c). According to the results of FRC samples, by using the GFRP and CFRP, the PDS is decreased such that no crack was observed in the samples subjected to 300 and 900 kPa pressures.…”

Section: Performance Of Rct Under Various Internal Pressurementioning

confidence: 99%

Surrogate models for the prediction of damage in reinforced concrete tunnels under internal water pressure

Bigdeli

Shishegaran

Naghsh

et al. 2021

J. Zhejiang Univ. Sci. A

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In the present study, the performance of reinforced concrete tunnel (RCT) under internal water pressure is evaluated by using nonlinear finite element analysis and surrogate models. Several parameters, including the compressive and tensile strength of concrete, the size of the longitudinal reinforcement bar, the transverse bar diameter, and the internal water pressure, are considered as the input variables. Based on the levels of variables, 36 mix designs are selected by the Taguchi method, and 12 mix designs are proposed in this study. Carbon fiber reinforced concrete (CFRC) or glass fiber reinforced concrete (GFRC) is considered for simulating these 12 samples. Principal component regression (PCR), Multi Ln equation regression (MLnER), and gene expression programming (GEP) are employed for predicting the percentage of damaged surfaces (PDS) of the RCT, the effective tensile plastic strain (ETPS), the maximum deflection of the RCT, and the deflection of crown of RCT. The error terms and statistical parameters, including the maximum positive and negative errors, mean absolute percentage error (MAPE), root mean square error (RMSE), coefficient of determination, and normalized square error (NMSE), are utilized to evaluate the accuracy of the models. Based on the results, GEP performs better than other models in predicting the outputs. The results show that the internal water pressure and the mechanical properties of concrete have the most effect on the damage and deflection of the RCT.

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Section: Performance Of Rct Under Various Internal Pressurementioning

confidence: 99%

Surrogate models for the prediction of damage in reinforced concrete tunnels under internal water pressure

Bigdeli

Shishegaran

Naghsh

et al. 2021

J. Zhejiang Univ. Sci. A

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“…Concrete structures are currently the most important structures in the construction industry. Improving the mechanical properties of reinforced concrete structures is always a hot research eld [1][2][3][4][5]. Shear design is an important aspect in concrete structure design for preventing shear failure, which may cause instantaneous brittle failure; the damage incurred is severe and can result in catastrophic consequences.…”

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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“…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%

“…In addition, the new system of voided slabs demonstrated pretty much the same behavior as solid slabs in terms of loaddisplacement curves [12]. Shishegaran et al introduced the fixed RC frames using the transferred stress system (TSS) and conventional steel bars in 2020 [13]. eir outcomes are compared in order to specify and assess the performance of ordinary and TSS fixed frames.…”

Section: Introductionmentioning

confidence: 99%

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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Performance of fixed beam without interacting bars

Cited by 28 publications

References 27 publications

Surrogate models for the prediction of damage in reinforced concrete tunnels under internal water pressure

Surrogate models for the prediction of damage in reinforced concrete tunnels under internal water pressure

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

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

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