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Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 306-325 doi: 10.1007/s11709-022-0890-5

Abstract: This paper numerically studied the effect of uncertainty and random distribution of concrete strength in beams failing in shear and flexure using lattice modeling, which is suitable for statistical analysis. The independent variables of this study included the level of strength reduction and the number of members with reduced strength. Three levels of material deficiency (i.e., 10%, 20%, 30%) were randomly introduced to 5%, 10%, 15%, and 20% of members. To provide a database and reliable results, 1000 analyses were carried out (a total of 24000 analyses) using the MATLAB software for each combination. Comparative studies were conducted for both shear- and flexure-deficit beams under four-point loading and results were compared using finite element software where relevant. Capability of lattice modeling was highlighted as an efficient tool to account for uncertainty in statistical studies. Results showed that the number of deficient members had a more significant effect on beam capacity compared to the level of strength deficiency. The scatter of random load-capacities was higher in flexure (range: 0.680–0.990) than that of shear (range: 0.795–0.996). Finally, nonlinear regression relationships were established with coefficient of correlation values (R2) above 0.90, which captured the overall load–deflection response and level of load reduction.

Keywords： lattice modeling     shear failure     flexural failure     uncertainty     deficiency     numerical simulation    

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Enhanced empirical models for predicting the drift capacity of less ductile RC columns with flexural,shear or axial failure modes

Mohammad Reza AZADI KAKAVAND, Reza ALLAHVIRDIZADEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1251-1270 doi: 10.1007/s11709-019-0554-2

Abstract: In the current article, novel empirical approaches are presented for predicting flexural, shear and axialfailure modes in RC columns.

Keywords： flexural-shear-axial failure     drift capacity     reinforced concrete columns     statistical analysis     fragility    

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Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural

Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 3,   Pages 352-360 doi: 10.1007/s11709-017-0453-3

Abstract: with a span of 2.1 m reinforced with both pre-stressing steel and GFRP were constructed and tested to failureEach slab had 37.41 mm2 prestressing wire with a failure stress of 1722.5 MPa.The experimental flexural strength and deflection of slabs were compared with their respective sizes

Keywords： Partial pre-stressing     composite structures     GFRP bars    

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Analysis of stiffness and flexural strength of a reinforced concrete beam using an invented reinforcement

Nazim Abdul NARIMAN, Martin HUSEK, Ilham Ibrahim MOHAMMAD, Kaywan Othman AHMED, Diyako DILSHAD, Ibrahim KHIDR

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 378-389 doi: 10.1007/s11709-021-0706-z

Abstract: The results of the flexure test were collected and analyzed, and the flexural strength, the rate of damageThe results of the experimental tests showed that the flexural strength of the invented reinforcementMoreover, the flexural cracks decreased to a significant extent, manifesting extremely small and narrowwere verified through numerical simulations, which demonstrated excellent similarities between the flexuralfailure and the stiffness of the beam.

Keywords： three-point flexure test     softening stage     flexural crack     flexural strain    

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Effect of size on biaxial flexural strength for cement-based materials by using a triangular plate method

Hakan T TURKER

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 1017-1028 doi: 10.1007/s11709-022-0871-8

Abstract: The effect of size on the biaxial flexural strength (BFS) of Portland cement mortar was investigated

Keywords： testing     apparatus & methods     plain concrete     tensile properties     biaxial flexural strength     triangular    

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Integrated management of cardiac failure: the cardiac failure clinic

Daniel LOISANCE

Frontiers of Medicine 2011, Volume 5, Issue 1,   Pages 20-25 doi: 10.1007/s11684-011-0106-1

Abstract:

The prevalence of the risk factors and the risk of cardiac failure are both increasing in China.The wide range of clinical presentations of cardiac failure (acute or chronic) and of therapeutic approaches

Keywords： cardiac failure     cardiac transplantation     mechanical circulatory support    

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An experimental study on the flexural behavior of heavily steel reinforced beams with high-strength concrete

Yasser SHARIFI, Ali Akbar MAGHSOUDI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 46-56 doi: 10.1007/s11709-014-0237-y

Abstract: Tests are reported in this study on the flexural behavior of high-strength reinforced concrete (HSRC)

Keywords： high-strength concrete (HSC) members     flexural behavior     reinforced concrete     experimental results     ultimate    

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Effect of bond enhancement using carbon nanotubes on flexural behavior of RC beams strengthened with

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 131-143 doi: 10.1007/s11709-021-0787-8

Abstract: experimental results showed the ability of the CNTs to delay the initiation of the cracks and to enhance the flexuralThe studied parameters included concrete strength, flexural reinforcement ratio, and CFRP sheet configurationThe numerical results showed that utilization of CNTs in CFRP production improved the flexural capacityIn case of using underside-strip, the longer or the wider the sheet, the higher was the flexural capacityThe flexural enhancement of RC beams by strengthening with CNTs-modified CFRP decreased with increasing

Keywords： RC beams     flexural     strengthening     CFRP     CNTs     finite element    

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The ITZ microstructure, thickness, porosity and its relation with compressive and flexural strength of

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 191-201 doi: 10.1007/s11709-021-0792-y

Abstract: by backscattered electron images and by consequences to the compressive (Fc) and flexural

Keywords： cement fineness     interfacial transition zone     compressive and flexural strength    

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Experimental study on flexural behavior of ECC/RC composite beams with U-shaped ECC permanent formwork

Zhi QIAO, Zuanfeng PAN, Weichen XUE, Shaoping MENG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1271-1287 doi: 10.1007/s11709-019-0556-0

Abstract: The flexural performance of the ECC/RC composite beam has been investigated experimentally with eightAccording to the test results, the failure of a composite beam with a U-shaped ECC formwork is initiatedUnder the same reinforcement configurations, ECC/RC composite beams exhibit increases in flexural performance

Keywords： engineered cementitious composite (ECC)     durability     ECC/RC composite beam     permanent formwork     flexural    

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Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 623-642 doi: 10.1007/s11709-021-0726-8

Abstract: In this study, gradual and sudden reduction methods were combined to simulate a progressive failure inUsing the presented method, a progressive failure is simulated based on a linear softening law priorto a catastrophic failure, and thereafter, sudden reduction methods are employed for modeling a progressivefailure.The proposed method is intended to predict the first ply failure (FPF), LPF, and dominant failure modes

Keywords： progressive failure     notched composite plate     Hashin failure criterion     macro mechanics approach     finite    

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Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 341-355 doi: 10.1007/s11709-013-0221-y

Abstract: bending test is conducted on manufactured RC beam using a cyclic displacement controlled regime until failure

Keywords： re-centering     shape memory alloys     concrete     composite     fiber reinforced polymer     scanning electron microscopy    

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Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 163-175 doi: 10.1007/s11709-014-0272-8

Abstract: This paper presents an investigation on the flexural-torsional buckling behavior of aluminum alloy beamsFirst, based on the tests of 14 aluminum alloy beams under concentrated loads, the failure pattern, load-deformationcurves, bearing capacity and flexural-torsional buckling factor are studied.Moreover, the span, loading location and slenderness ratio influence the flexural-torsional bucklingSecondly, besides the experiments, a finite element method (FEM) analysis on the flexural-torsional buckling

Keywords： flexural-torsional buckling     aluminum alloy beams (AAB)     finite element method (FEM)     theoretical formula    

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Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 704-721 doi: 10.1007/s11709-023-0941-6

Abstract: In this study, the flexural and longitudinal shear performances of two types of precast lightweight steel–ultra-highOwing to its better integrity, the CUS exhibits greater flexural stiffness and a higher ultimate bearingthe design parameters of the CUS, a parametric study is conducted to investigate their effects on the flexural

Keywords： precast steel–UHPC composite beam     flexural performance     longitudinal shear performance     parametric study    

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Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Frontiers of Structural and Civil Engineering   Pages 1033-1046 doi: 10.1007/s11709-023-0973-y

Abstract: This study focuses on the bending failure performance of a shield tunnel segment.A full-scale test was conducted to investigate deformation and failure characteristics.During the loading, the bending failure process can be divided into four stages: the elastic stage, workingstage with cracks, failure stage, and ultimate stage.The characteristic loads between contiguous stages are the cracking, failure, and ultimate loads.

Keywords： shield tunnel     bearing capacity     failure mechanism     segment reinforcement    

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Title Author Date Type Operation

Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Journal Article

Enhanced empirical models for predicting the drift capacity of less ductile RC columns with flexural,shear or axial failure modes

Mohammad Reza AZADI KAKAVAND, Reza ALLAHVIRDIZADEH

Journal Article

Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural

Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA

Journal Article

Analysis of stiffness and flexural strength of a reinforced concrete beam using an invented reinforcement

Nazim Abdul NARIMAN, Martin HUSEK, Ilham Ibrahim MOHAMMAD, Kaywan Othman AHMED, Diyako DILSHAD, Ibrahim KHIDR

Journal Article

Effect of size on biaxial flexural strength for cement-based materials by using a triangular plate method

Hakan T TURKER

Journal Article

Integrated management of cardiac failure: the cardiac failure clinic

Daniel LOISANCE

Journal Article

An experimental study on the flexural behavior of heavily steel reinforced beams with high-strength concrete

Yasser SHARIFI, Ali Akbar MAGHSOUDI

Journal Article

Effect of bond enhancement using carbon nanotubes on flexural behavior of RC beams strengthened with

Journal Article

The ITZ microstructure, thickness, porosity and its relation with compressive and flexural strength of

Journal Article

Experimental study on flexural behavior of ECC/RC composite beams with U-shaped ECC permanent formwork

Zhi QIAO, Zuanfeng PAN, Weichen XUE, Shaoping MENG

Journal Article

Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Journal Article

Experimental flexural behavior of SMA-FRP reinforced concrete beam

Adeel ZAFAR, Bassem ANDRAWES

Journal Article

Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Journal Article

Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete

Journal Article

Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Journal Article