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compressive strength 23

strength 18

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model test 15

numerical simulation 15

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kinetic model 10

sensitivity analysis 10

shear strength 9

concrete 8

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Development of deep neural network model to predict the compressive strength of FRCM confined columns

Khuong LE-NGUYEN; Quyen Cao MINH; Afaq AHMAD; Lanh Si HO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1213-1232 doi: 10.1007/s11709-022-0880-7

Abstract: The present study describes a reliability analysis of the strength model for predicting concrete columnsFabric-Reinforced Cementitious Matrix (FRCM). through both physical models and Deep Neural Network modelThe database of 330 samples collected for the training model contains many important parameters, i.e.The ANN model with double hidden layers (APDL-1) was shown to be the best to predict the compressivestrength of FRCM confined columns compared with the ACI design code and five physical models.

Keywords： FRCM     deep neural networks     confinement effect     strength model     confined concrete    

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Micromechanics model for static and dynamic strength of concrete under confinement

ZHENG Dan

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 329-335 doi: 10.1007/s11709-008-0044-4

Abstract: in concrete and the interaction among cracks as well as the induced failure were analyzed using the modelThe pseudo-force method is applied to calculate the compressive strength factor of kinky propagated crackthat the micro fracture toughness of concrete does not vary with stain rate, the static and dynamic strengthcalculation result with experimental data indicates that a good agreement is achieved which implies that the model

Keywords： comparison     different     interaction     pseudo-force     toughness    

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Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 843-857 doi: 10.1007/s11709-022-0834-0

Abstract: Effects of critical variables on the beam shear strength, including the compressive strength of concreteConsequently, the model proposed in this study demonstrates better performance and more accuracy forobtained from this study can also serve researchers and engineers in selection of the proper shear strength

Keywords： embedded through-section     strengthening     fiber-reinforced polymer     finite element     shear strength model    

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Truss-arch model for shear strength of seismic-damaged SRC frame columns strengthened with CFRP sheets

Sheng PENG, Chengxiang XU, Xiaoqiang LIU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1324-1337 doi: 10.1007/s11709-019-0557-z

Abstract: To investigate the shear strength of SRC frame columns strengthened with CFRP sheets, experimental observationsTo present the expression formula of the shear strength of SRC frame columns strengthened with CFRP sheets, the contributions of strengthening material and transverse reinforcement to shear strength in the trussmodel are considered, based on the truss-arch model.Results indicate that the proposed whole analysis model can improve the accuracy of shear strength predictions

Keywords： fiber reinforced polymer material     steel reinforced concrete frame column     seismic-damaged     trussed-arch model     shear strength    

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Finite element analysis of controlled low strength materials

Vahid ALIZADEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1243-1250 doi: 10.1007/s11709-019-0553-3

Abstract: Controlled low strength materials (CLSM) are flowable and self-compacting construction materials thatThe study was conducted using a plastic-damage model which captures the material behavior using both

Keywords： CLSM     finite element method     compressive strength     pullout     numerical modeling     plastic damage model    

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Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected

Antonio MARÍ,Antoni CLADERA,Jesús BAIRÁN,Eva OLLER,Carlos RIBAS

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 337-353 doi: 10.1007/s11709-014-0081-0

Abstract: A mechanical model recently developed for the shear strength of slender reinforced concrete beams withThe shear strength is considered to be the sum of the shear transferred by the concrete compression chordThe predictions of the model have been compared to those obtained by using the EC2, MC2010 and ACI 318detailed application example has been presented, obtaining each contributing component to the shear strength

Keywords： shear strength     mechanical model     reinforced concrete     design     assessment     shear tests    

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Data driven models for compressive strength prediction of concrete at high temperatures

Mahmood AKBARI, Vahid JAFARI DELIGANI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 311-321 doi: 10.1007/s11709-019-0593-8

Abstract: nearest neighbor models based on collection of 207 laboratory tests, are investigated for compressive strengthIn addition for each model, two different sets of input variables are examined: a complete set and astandard and demonstrate the suitability of using the data driven models to predict the compressive strength

Keywords： data driven model     compressive strength     concrete     high temperature    

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Determination of shear strength of steel fiber RC beams: application of data-intelligence models

Abeer A. AL-MUSAWI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 667-673 doi: 10.1007/s11709-018-0504-4

Abstract: data-intelligence models, the input matrix attribute is one of the central element in attaining accurate predictive modelHence, various input attributes are constructed to model the shear strength “as a targeted variable”.ratio ( ), while the shear strength ( ) is the output of the matrix.The final results obtained indicated that the hybrid predictive model of ANN-PSO can be used efficientlyIn more representable details, the hybrid model attained the values of root mean square error and correlation

Keywords： hybrid intelligence model     shear strength     prediction     steel fiber reinforced concrete    

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The influence of hand hole on the ultimate strength and crack pattern of shield tunnel segment jointsby scaled model test

Shaochun WANG, Xi JIANG, Yun BAI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1200-1213 doi: 10.1007/s11709-019-0546-2

Abstract: With the shield tunnel going deeper and deeper, the circumferential axial force becomes the governing factor rather than the bending moment. The hand hole acts as a weak point and initial damage in the segment joint especially when the circumferential axial force is extremely high. Despite the wide application of steel fiber or synthetic fiber in the tunneling, limited researches focus on the structural responses of segment joint with macro structural synthetic fiber (MSSF). In this paper, a 1:2 reduced-scale experiment was conducted to study the structural performance of the segment joint with different types of hand holes under ultra-high axial force. Special attention is paid to failure mode and structural performance (bearing capacity, deformation, cracking, and toughness). Moreover, segment joints with MSSF are also tested to evaluate the effects of MSSF on the failure mode and structural performance of the segment joints. The experiment results show that the hand hole becomes the weakest point of the segment joint under ultra-high axial force. A \ /-type crack pattern is always observed before the final failure of the segment joints. Different types and sizes of the hand hole have different degree of influences on the structural behavior of segment joints. The segment joint with MSSF shows higher ultimate bearing capacity and toughness compared to segment joint with common concrete. Besides, the MSSF improves the initial cracking load and anti-spallling resistance of the segment joint.

Keywords： shield tunneling     structural synthetic fiber concrete     hand hole     segment joint     ultimate bearing capacity     crack pattern    

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Evaluation of potential failure of rock slope at the left abutment of Jinsha River Bridge by model test

Zhiming ZHAO, Xihua WANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 332-340 doi: 10.1007/s11709-013-0206-x

Abstract: To evaluate the stability of the rock slope under bridge foundation, model test and calculation modelAccording to model test, failure mainly initiated at the toe with shear movement along the joint planesresulting in the sliding along the slope surface and formation of tension crack at the crest of the modelThis result coincide with the UDEC model, which shows that slope surface will produce loosening damage

Keywords： slope stability     strength properties     model test     numerical analysis    

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Predicting the capacity of perfobond rib shear connector using an ANN model and GSA method

Guorui SUN; Jun SHI; Yuang DENG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1233-1248 doi: 10.1007/s11709-022-0878-1

Abstract: A connector is an important part of a composite beam, and its shear strength can have a significant impactperformance of perfobond rib shear connectors (PRSCs) is predicted based on the back propagation (BP) ANN modelpredicted by the ANN models and empirical equations were compared, and the factors affecting shear strengthThe results show that the use of ANN model optimization by GA method has fewer errors compared to theperformance, while the bonding force between steel plate and concrete has the least sensitivity to shear strength

Keywords： perfobond rib shear connector     shear strength     ANN model     global sensitivity analysis    

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Endochronic damage constitutive model for fully-graded aggregate mass concrete

SONG Yupu, WANG Huailiang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 274-280 doi: 10.1007/s11709-007-0035-x

Abstract: The behavior of deformation and strength of a fully-graded aggregate concrete under complex stress statewith damage mechanics and on the quantities of experimental data, an endochronic damage constitutive modelThis model takes into consideration the scale effect and the effect of wet screen sieve of aggregateThe proposed model is used to analyze the deformation and strength of fully-graded aggregate mass concrete

Keywords： concept     surface     design     concern     strength    

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Prediction model for residual strength of stiffened panels with multiple site damage based on artificial

Yang Maosheng,Chen Yueliang,Yu Dazhao

Strategic Study of CAE 2008, Volume 10, Issue 5,   Pages 46-50

Abstract:

A prediction model for residual strength of stiffened panels with multiplebased on artificial neural network (ANN) is developed, and the results obtained from the trained BP modelThe results obtained indicate that the neural network model predictions are in the best agreement withexperimental data than any other methods, and the modified linkup models predict better than the linkup modelThe results show that the residual strength decreases linearly as the half-crack length of lead crack

Keywords： neural network     multiple site damage     stiffened panel     residual strength    

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Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm

Yiyi CHEN,Wei SUN,Tak-Ming CHAN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 178-186 doi: 10.1007/s11709-014-0245-y

Abstract: This paper presents a constitutive model based on Ramberg-Osgood equation to describe the hysteresismaterial behavior of structural carbon steel with nominal yield strength between 235 to 420 N/mm .The proposed model was calibrated against a series of cyclic material tests with strain amplitude varyingA simple relationship between the modular parameter and the yield strength was proposed.further the experimental behavior of test specimens with nominal yield strength of 460 N/mm .

Keywords： constitutive model     finite element analysis     hysteresis curve     Ramberg-Osgood equation    

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Research on strength developing law during the curing of domestic epoxy asphalt mixture

Qian Zhendong,Wang Yaqi and Shen Jialin

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 90-95

Abstract:

Based on the mechanism of strength, the reserved time and curing temperatureof epoxy asphalt mixture are studied as the influencing factors of strength, and the range of reservedtime and the strength increasing law of epoxy asphalt mixture in different temperatures are determinedThen the model of curing reaction of epoxy asphalt binder is established.

Keywords： epoxy asphalt     strength increasing     time-temperature condition     curing model    

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Title Author Date Type Operation

Development of deep neural network model to predict the compressive strength of FRCM confined columns

Khuong LE-NGUYEN; Quyen Cao MINH; Afaq AHMAD; Lanh Si HO

Journal Article

Micromechanics model for static and dynamic strength of concrete under confinement

ZHENG Dan

Journal Article

Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Journal Article

Truss-arch model for shear strength of seismic-damaged SRC frame columns strengthened with CFRP sheets

Sheng PENG, Chengxiang XU, Xiaoqiang LIU

Journal Article

Finite element analysis of controlled low strength materials

Vahid ALIZADEH

Journal Article

Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected

Antonio MARÍ,Antoni CLADERA,Jesús BAIRÁN,Eva OLLER,Carlos RIBAS

Journal Article

Data driven models for compressive strength prediction of concrete at high temperatures

Mahmood AKBARI, Vahid JAFARI DELIGANI

Journal Article

Determination of shear strength of steel fiber RC beams: application of data-intelligence models

Abeer A. AL-MUSAWI

Journal Article

The influence of hand hole on the ultimate strength and crack pattern of shield tunnel segment jointsby scaled model test

Shaochun WANG, Xi JIANG, Yun BAI

Journal Article

Evaluation of potential failure of rock slope at the left abutment of Jinsha River Bridge by model test

Zhiming ZHAO, Xihua WANG

Journal Article

Predicting the capacity of perfobond rib shear connector using an ANN model and GSA method

Guorui SUN; Jun SHI; Yuang DENG

Journal Article

Endochronic damage constitutive model for fully-graded aggregate mass concrete

SONG Yupu, WANG Huailiang

Journal Article

Prediction model for residual strength of stiffened panels with multiple site damage based on artificial

Yang Maosheng,Chen Yueliang,Yu Dazhao

Journal Article

Cyclic stress-strain behavior of structural steel with yield-strength up to 460 N/mm

Yiyi CHEN,Wei SUN,Tak-Ming CHAN

Journal Article

Research on strength developing law during the curing of domestic epoxy asphalt mixture

Qian Zhendong,Wang Yaqi and Shen Jialin

Journal Article