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Effect of seismic wave propagation in massed medium on rate-dependent anisotropic damage growth in concrete

Alireza DANESHYAR, Hamid MOHAMMADNEZHAD, Mohsen GHAEMIAN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 346-363 doi: 10.1007/s11709-021-0694-z

Abstract: Hence, a microplane-based anisotropic damage–plastic model of concrete is formulated to reproduce irreversible

Keywords： soil–structure interaction     massed foundation     radiation damping     anisotropic damage    

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Uncoupled state space solution to layered poroelastic medium with anisotropic permeability and compressible

Zhiyong AI, Wenze ZENG, Yichong CHENG, Chao WU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 171-179 doi: 10.1007/s11709-011-0103-0

Abstract: uncoupled state space solution to three-dimensional consolidation of layered poroelastic medium with anisotropic

Keywords： uncoupled state space solution     layered poroelastic medium     three-dimensional consolidation     anisotropic    

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Effect of anisotropic characteristics on the mechanical behavior of asphalt concrete overlay

Lingyun YOU, Zhanping YOU, Kezhen YAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 110-122 doi: 10.1007/s11709-018-0476-4

Abstract: The strength contributed by the AC overlay is strongly influenced by the anisotropic properties of theanisotropy model against those corresponding to the isotropic model under static loads show that the anisotropicTherefore, future research concerning the reinforcement and repair of pavements should consider the anisotropic

Keywords： asphalt concrete overlay     anisotropy     temperature gradients     modulus gradients     finite element simulation     sensitivity analysis    

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Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 109-123 doi: 10.1007/s11709-021-0693-0

Abstract: The anisotropy of rockfill materials has a significant influence on the performance of engineering structures. However, relevant research data are very limited, because of the difficulty with preparing specimens with different inclination angles using traditional methods. Furthermore, the anisotropy test of rockfill materials is complex and complicated, especially for triaxial tests, in which the major principal stress plane intersects with the compaction plane at different angles. In this study, the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated, and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were examined. For high-density rockfill materials, a set of specimen preparation devices for inclined compaction planes was developed, and a series of conventional triaxial compression tests with different principal stress direction angles were conducted. The results reveal that the principal stress direction angle has a significant effect on the modulus, shear strength, and dilatancy of the compacted rockfill materials. Analysis of the relationship between the principal stress direction angles, change in the stress state, and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle orientation. In addition, different principal stress direction angles can change the extent of the particle interlocking effect, causing the specimen to exhibit different degrees of anisotropy.

Keywords： rockfill     inclination of specimen preparation     anisotropy     mechanical property     mechanism    

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Windborne debris damage prediction analysis

Fangfang SONG, Jinping OU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 326-330 doi: 10.1007/s11709-010-0067-5

Abstract: Windborne debris is one of the most important causes of the envelop destruction according to the post-damageThe problem of windborne debris damage could be summarized as three parts, including windborne debrisBesides, the process of windborne debris damage analysis is described in detail.

Keywords： typhoon     windborne debris     structural envelopes     damage estimation    

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Corrosion damage assessment and monitoring of large steel space structures

Bo CHEN, You-Lin XU, Weilian QU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 354-369 doi: 10.1007/s11709-010-0088-0

Abstract: This paper proposes a framework for assessing the corrosion damage of large steel space structures subjectedreal large steel space structure built in the southern coastal area in China to assess its corrosion damage

Keywords： large steel space structure     atmospheric corrosion     stress corrosion cracking     corrosion damage     damage assessment    

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Detection of damage locations and damage steps in pile foundations using acoustic emissions with deep

Alipujiang JIERULA, Tae-Min OH, Shuhong WANG, Joon-Hyun LEE, Hyunwoo KIM, Jong-Won LEE

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 318-332 doi: 10.1007/s11709-021-0715-y

Abstract: The aim of this study is to propose a new detection method for determining the damage locations in pileFirst, the damage location is simulated using a back propagation neural network deep learning model withIn particular, the damage location is identified using two parameters: the pile location ( ) and theSecond, the damage step condition is determined using a classification model with an acoustic emissionFinally, a new damage detection and evaluation method for pile foundations is proposed.

Keywords： pile foundations     damage location     acoustic emission     deep learning     damage step    

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Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0702-6

Abstract: The creep life of an aeroengine recuperator is investigated in terms of continuum damage mechanics by

Keywords： creep     life assessment     brazed joint     continuum damage mechanics     aeroengine recuperator    

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Bacterial inactivation, DNA damage, and faster ATP degradation induced by ultraviolet disinfection

Chao Yang, Wenjun Sun, Xiuwei Ao

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1192-6

Abstract: • Long amplicon is more effective to test DNA damage induced by UV. • ATP in bacteria does not degradeWe used quantitative polymerase chain reaction (qPCR) to investigate DNA damage and evaluated adenosineThe results of qPCR effectively showed the DNA damage induced by UV when using longer gene amplicons,

Keywords： UV disinfection     DNA damage     qPCR     ATP    

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The damage evolution behavior of polypropylene fiber reinforced concrete subjected to sulfate attack

Ninghui LIANG; Jinwang MAO; Ru YAN; Xinrong LIU; Xiaohan ZHOU

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 316-328 doi: 10.1007/s11709-022-0810-8

Abstract: To study the damage evolution behavior of polypropylene fiber reinforced concrete (PFRC) subjected toeffect of sulfate attack relative to time and fiber hybridization were analyzed and the compression damageThe initial damage factor of hybrid PFRC was −0.042 and −0.056 respectively after 150 d of corrosion,

Keywords： polypropylene fiber reinforced concrete     sulfate attack     damage evolution behavior     acoustic emission     damage factor    

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Spectral element modeling based structure piezoelectric impedance computation and damage identification

Zhigang GUO, Zhi SUN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 4,   Pages 458-464 doi: 10.1007/s11709-011-0133-7

Abstract: paper presents a numerical simulation study on electromechanical impedance technique for structural damageThe basic principle of impedance based damage detection is structural impedance will vary with the occurrenceand development of structural damage, which can be measured from electromechanical admittance curvesTherefore, structure damage can be identified from the electromechanical admittance measurements.In this study, a model based method that can identify both location and severity of structural damage

Keywords： PZT     piezoelectric impedance     optimization     spectral element     damage identification    

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Damage detection in beam-like structures using static shear energy redistribution

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1552-1564 doi: 10.1007/s11709-022-0903-4

Abstract: In this study, a static shear energy algorithm is presented for the damage assessment of beam-like structuresthe energy release principle, the strain energy of a damaged element suddenly changes when structural damageTherefore, the change in the static shear energy is employed to determine the damage locations in beam-likeis that only a few deflection data points of the beam structure are required during the process of damageAnother advantage of the proposed approach is that damage detection can be performed without establishing

Keywords： damage detection     beam structure     strain energy     static displacement variation     energy damage index    

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Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 348-357 doi: 10.1007/s11709-012-0176-4

Abstract: The objective of the present study is to analytically investigate temperature effects of an axial-type seismic damper made of shape memory alloys (SMAs) equipped in steel frames. Based on a modified multilinear one dimensional constitutive model of SMAs, two types of SMAs are employed, which have different stress plateau and different stress growth rate with temperature increase. Temperature effects of SMA dampers on seismic performance upgrading are discussed in three aspects: different environment temperatures; rapid loading rate induced heat generation and different SMA fractions. The analysis indicates that the effect of environment temperature should be considered for the SMA damper in steel frames. However, the rapid loading rate induced heat generation has little adverse effect.

Keywords： damage control design     shape memory alloy     temperature effect    

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Numerical simulation of damage in high arch dam due to earthquake

Hong ZHONG , Gao LIN , Hongjun LI

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 316-322 doi: 10.1007/s11709-009-0039-9

Abstract: Based on the assumption that concrete is macroscopic homogeneous, the cracking evolution process and damageThe bilinear damage evolution model and the damage evolution model expressed in power function with descending

Keywords： mesoscopic heterogeneity     damage simulation in earthquakes     arch dam    

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Finite element analysis of stress concentrations and failure criteria in composite plates with circular holes

Abdelhak KHECHAI,Abdelouahab TATI,Abdelhamid GUETTALA

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 281-294 doi: 10.1007/s11465-014-0307-9

Abstract:

In this study, the stress concentration factors (SCF) in cross-and-angle-ply laminated composite plates as well as in isotropic plates with single circular holes subjected to uniaxial loading is studied. A quadrilateral finite element of four-node with 32 degrees of freedom at each node, previously developed for the bending and mechanical buckling of laminated composite plates, is used to evaluate the stress distribution in laminated composite plates with central circular holes. Based up on the classical plate theory, the present finite element is a combination of a linear isoparametric membrane element and a high precision rectangular Hermitian element. The numerical results obtained by the present element compare favorably with those obtained by the analytic approaches published in literature. It is observed that the obtained results are very close to the reference results, which demonstrates the accuracy of the present element. Additionally, to determine the first ply failure (FPF) of laminated plate, several failure criterions are employed. Finally, to show the effect of ratio on the failure of plates, a number of figures are given for different fiber orientation angles.

Keywords： laminated composite plates     stress concentration     geometric singularity     anisotropic effect    

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Title Author Date Type Operation

Effect of seismic wave propagation in massed medium on rate-dependent anisotropic damage growth in concrete

Alireza DANESHYAR, Hamid MOHAMMADNEZHAD, Mohsen GHAEMIAN

Journal Article

Uncoupled state space solution to layered poroelastic medium with anisotropic permeability and compressible

Zhiyong AI, Wenze ZENG, Yichong CHENG, Chao WU

Journal Article

Effect of anisotropic characteristics on the mechanical behavior of asphalt concrete overlay

Lingyun YOU, Zhanping YOU, Kezhen YAN

Journal Article

Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Journal Article

Windborne debris damage prediction analysis

Fangfang SONG, Jinping OU,

Journal Article

Corrosion damage assessment and monitoring of large steel space structures

Bo CHEN, You-Lin XU, Weilian QU,

Journal Article

Detection of damage locations and damage steps in pile foundations using acoustic emissions with deep

Alipujiang JIERULA, Tae-Min OH, Shuhong WANG, Joon-Hyun LEE, Hyunwoo KIM, Jong-Won LEE

Journal Article

Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Journal Article

Bacterial inactivation, DNA damage, and faster ATP degradation induced by ultraviolet disinfection

Chao Yang, Wenjun Sun, Xiuwei Ao

Journal Article

The damage evolution behavior of polypropylene fiber reinforced concrete subjected to sulfate attack

Ninghui LIANG; Jinwang MAO; Ru YAN; Xinrong LIU; Xiaohan ZHOU

Journal Article

Spectral element modeling based structure piezoelectric impedance computation and damage identification

Zhigang GUO, Zhi SUN

Journal Article

Damage detection in beam-like structures using static shear energy redistribution

Journal Article

Temperature effects of shape memory alloys (SMAs) in damage control design of steel portal frames

Xiaoqun LUO, Hanbin GE, Tsutomu USAMI

Journal Article

Numerical simulation of damage in high arch dam due to earthquake

Hong ZHONG , Gao LIN , Hongjun LI

Journal Article

Finite element analysis of stress concentrations and failure criteria in composite plates with circular holes

Abdelhak KHECHAI,Abdelouahab TATI,Abdelhamid GUETTALA

Journal Article