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Influence of advanced engineering measures on displacement and stress field of surrounding rock in tunnels

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0966-x

Abstract: A numerical method was used to investigate the influence of LRAF methods on the stress and displacementFurthermore, anchor cable and grouting modifications changed the stress field of the rock mass in thestress field.The stress field in the modified grouting area changed from shear stress in the fault slip direction, displacement gradient, and shear stress.

Keywords： anti-fault effect     engineering measures     LRAF method     stress and displacement field     tunnel-crossing    

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Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0731-1

Abstract: based on limited displacement responses.Limited optical measured displacement responses are utilized to reconstruct the full-field strain.The full-field strain distribution is in-time visualized.reconstruct the full-field strain over the whole operating time.using displacement response, where the traditional SGs would fail.

Keywords： aero-engine blade     displacement response     dynamic strain reconstruction     mode shape     strain gauge    

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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 158-164 doi: 10.1007/s11709-009-0002-9

Abstract: A field test was conducted to investigate the distribution of temperature field and the variation ofthermal stress for a prestressed concrete (PC) box-girder bridge.According to field tests, the thermal stress incurred by hydration heat may induce temperature cracksFurthermore, the nonlinear distribution of temperature gradient and the fluctuation of thermal stress

Keywords： box-girder bridge     field test     hydration heat     temperature field     temperature gradient     thermal stress    

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Analysis of stress and failure in rock specimens with closed and open flaws on the surface

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1222-1237 doi: 10.1007/s11709-021-0773-1

Abstract: The influence of closed and open surface flaws on the stress distribution and failure in rock specimensconducted to investigate the influences of the flaw inclination, friction coefficient and the confining stressNumerical results show significant differences in the stress, displacement, and failure behavior of theAccording to the results, when compression is the dominant mode of stress applied to the flaw surface, an open flaw may play a destressing role in the rock and relocate the stress concentration and failure

Keywords： surface flaw     heterogeneity     circular hole     numerical modeling     relative displacement    

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Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 320-325 doi: 10.1007/s11465-009-0042-9

Abstract: between a circular piezoelectric inhomogeneity and an infinite piezoelectric matrix subjected to a far-fieldExplicit closed form expressions for the complex potentials in both the matrix and the inclusion, and the stress

Keywords： piezoelectric material     arc crack     strip saturation     stress intensity factor    

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Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 354-358 doi: 10.1007/s11465-011-0123-4

Abstract:

Magnetostriction is investigated to evaluate the stress relief caused by pulsed magnetic field treatment, because this physical property is closely associated with residual stress.The stress variations caused by pulsed magnetic treatment are also compared.It is found that magnetostriction variations are closely associated with stress changes.is nearly a constant during magnetic field treatment, which is valuable for stress relief evaluation

Keywords： magnetostriction     pulsed magnetic field treatment     stress relief    

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Effect of heat transfer coefficient of steam turbine rotor on thermal stress field under off-design condition

Jie GUO,Danmei XIE,Hengliang ZHANG,Wei JIANG,Yan ZHOU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 57-64 doi: 10.1007/s11708-015-0385-3

Abstract: The precise calculation of temperature and thermal stress field of steam turbine rotor under off-designapplied with ordinary rotor materials, has been conducted to investigate the temperature and thermal stresscalculation when steam parameters are low has a greater influence on that of rotor temperature and thermal stresscoefficient is larger than 10 W/(m ·°C), there will be barely any influence on the calculation of thermal stressThis research plays a constructive role in the calculation and analysis of thermal stress.

Keywords： steam turbine     rotor     thermal stress     heat transfer coefficient     empirical formula    

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Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 299-304 doi: 10.1007/s11709-009-0035-0

Abstract: The similarity law of centrifuge test was developed for the seepage field and stress field of a foundationFinally, a comparative study was conducted on the test results of the pit deformation and the field measurementresults show that the pit deformation regularity of the test is basically identical with that of the fieldmeasurement, and the difference in pit deformation between the test and the field measurement is withinThe centrifuge model test can effectively simulate the displacement response of the ground and retaining

Keywords： foundation pit with confined water     centrifuge model test     seepage-stress coupling field     similarity relation     field measurement     deformation    

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A New Method for Inferencing and Representing a Workpiece Residual Stress Field Using Monitored Deformation

Zhiwei Zhao,Changqing Liu,Yingguang Li,James Gao

Engineering 2023, Volume 22, Issue 3,   Pages 49-59 doi: 10.1016/j.eng.2022.07.018

Abstract: Existing technologies for measuring the residual stress field are either strain-based measurement methodsThis paper reports a new non-destructive method for inferencing the residual stress field based on deformationIn the proposed method, the residual stress field of a workpiece is inferred based on the characteristicsof the deformation forces that reflect the overall effect of the unbalanced residual stress field afterThe relationship between deformation forces and the residual stress field is modeled based on the principle

Keywords： Residual stress field     Precision manufacturing     Deformation force     Inverse problem     In situ     measurement    

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Calculation of Cohesive Stress Along the Fictitious Crack Zone in Concrete Materials

Xu Shilang,Wang Limin

Strategic Study of CAE 2002, Volume 4, Issue 5,   Pages 53-58

Abstract:

Nonlinear fracture behaviors of concrete materials are mainly caused by the cohesive stress alonganalytical model of crack with cohesive forces, two simple formulae concisely expressing the cohesive stressAs a result, using the test data of crack opening displacement, the cohesive stress distribution is determined

Keywords： concrete     crack opening displacement     fictitious crack cohesive force     algebra equations    

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Global sensitivity analysis of certain and uncertain factors for a circular tunnel under seismic action

Nazim Abdul NARIMAN, Raja Rizwan HUSSAIN, Ilham Ibrahim MOHAMMAD, Peyman KARAMPOUR

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1289-1300 doi: 10.1007/s11709-019-0548-0

Abstract: There are many certain and uncertain design factors which have unrevealed rational effects on the generation of tensile damage and the stability of the circular tunnels during seismic actions. In this research paper, we have dedicated three certain and four uncertain design factors to quantify their rational effects using numerical simulations and the Sobol’s sensitivity indices. Main effects and interaction effects between the design factors have been determined supporting on variance-based global sensitivity analysis. The results detected that the concrete modulus of elasticity for the tunnel lining has the greatest effect on the tensile damage generation in the tunnel lining during the seismic action. In the other direction, the interactions between the concrete density and both of concrete modulus of elasticity and tunnel diameter have appreciable effects on the tensile damage. Furthermore, the tunnel diameter has the deciding effect on the stability of the tunnel structure. While the interaction between the tunnel diameter and concrete density has appreciable effect on the stability process. It is worthy to mention that Sobol’s sensitivity indices manifested strong efficiency in detecting the roles of each design factor in cooperation with the numerical simulations explaining the responses of the circular tunnel during seismic actions.

Keywords： shear waves     Sobol’s sensitivity indices     maximum principal stress     maximum overall displacement     tensile    

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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: Surcharge load (e.g. embankment fill) will induce settlement and outward lateral displacement, whilevacuum pressure will induce settlement and inward lateral displacement of a ground.Ideally, combination of surcharge load and vacuum pressure can reduce or minimize the lateral displacementFor the conditions investigated, the results indicate that the outward lateral displacement increasesAlso, it is shown that for a given and condition, lateral displacement reduces with the increase

Keywords： vacuum consolidation     lateral displacement     PVD     finite element analysis     surcharge load    

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Shear assessment of compression flanges of structural concrete T-beams

Bj?rn SCHüTTE,Viktor SIGRIST

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 354-361 doi: 10.1007/s11709-014-0082-z

Abstract: The general design procedure is based on a strut-and-tie (or a stress field) model which comprises spreadingAn advanced method for the analysis of webs in shear is the Generalized Stress Field Approach [ ].

Keywords： concrete structures     structural assessment     stress field analysis     shear    

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Quality control based on electrode displacement and force in resistance spot welding

Chuntao JI, Lipeng DENG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 412-417 doi: 10.1007/s11465-010-0114-x

Abstract: The behaviors of electrode displacement and force during spot welding under various conditions, such

Keywords： aluminum     electrode displacement     electrode force     nugget size     data acquisition    

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Analysis and control of hydration heat of cast-in-place diaphragm of segmental precast box girder

Chen Yang,Zhong Yao,Zheng Kaiqi,Shen Bin,Meng Shaoping

Strategic Study of CAE 2013, Volume 15, Issue 8,   Pages 99-103

Abstract: diaphragm, it belongs to massive concrete,in which concrete hydration heat may cause excessive tensile stressBased on three-dimensional transient temperature field theory, numerical simulation with ANSYS was performed, to investigate the distribution law of hydration heat temperature and stress.The analysis shows that, the tensile stress at the outside of the webs is sufficient to lead to concreteWith the distribution of temperature and stress obtained from numerical simulation, a series of control

Keywords： concrete box girder     hydration heat     temperature field     stress field     cracks    

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Title Author Date Type Operation

Influence of advanced engineering measures on displacement and stress field of surrounding rock in tunnels

Journal Article

Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses

Journal Article

Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Journal Article

Analysis of stress and failure in rock specimens with closed and open flaws on the surface

Journal Article

Stress field near circular-arc interface crack tip based on electric saturation concept

Longchao DAI, Xinwei WANG

Journal Article

Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Journal Article

Effect of heat transfer coefficient of steam turbine rotor on thermal stress field under off-design condition

Jie GUO,Danmei XIE,Hengliang ZHANG,Wei JIANG,Yan ZHOU

Journal Article

Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Journal Article

A New Method for Inferencing and Representing a Workpiece Residual Stress Field Using Monitored Deformation

Zhiwei Zhao,Changqing Liu,Yingguang Li,James Gao

Journal Article

Calculation of Cohesive Stress Along the Fictitious Crack Zone in Concrete Materials

Xu Shilang,Wang Limin

Journal Article

Global sensitivity analysis of certain and uncertain factors for a circular tunnel under seismic action

Nazim Abdul NARIMAN, Raja Rizwan HUSSAIN, Ilham Ibrahim MOHAMMAD, Peyman KARAMPOUR

Journal Article

Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Journal Article

Shear assessment of compression flanges of structural concrete T-beams

Bj?rn SCHüTTE,Viktor SIGRIST

Journal Article

Quality control based on electrode displacement and force in resistance spot welding

Chuntao JI, Lipeng DENG

Journal Article

Analysis and control of hydration heat of cast-in-place diaphragm of segmental precast box girder

Chen Yang,Zhong Yao,Zheng Kaiqi,Shen Bin,Meng Shaoping

Journal Article