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Determination of energy dissipation of a spider silk structure under impulsive loading

Jorge ALENCASTRE,Carlos MAGO,Richard RIVERA

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 306-310 doi: 10.1007/s11465-015-0349-7

Abstract: For this research, the analysis has taken a dynamic approach and determined the dissipation energy ofexperimental and analytical results, the latter obtained by using adjusted models, have given high levels of dissipationenergy during the first cycle of vibration, which are consistent with the values suggested by other

Keywords： dissipation energy     impact     visco-elastic material     spider silk    

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Aseismic smart building isolation systems under multi-level earthquake excitations: Part II, energy-dissipation

Min-Ho CHEY,J. Geoffrey CHASE,John B. MANDER,Athol J. CARR

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3,   Pages 297-306 doi: 10.1007/s11709-015-0308-8

Abstract: companion paper), this following study verifies the control effects of the systems from the view point of energydissipation and damage level metrics.building structures utilizing passive dampers and semi-active resettable devices are analyzed and the energy-basedPerformance comparisons are conducted on statistically calculated story/structural hysteretic energythe identification of differences in the mechanisms by which smart building isolation systems remove energy

Keywords： smart building isolation     story and structural     energy-dissipation     damage assessment    

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Experimental investigations of internal energy dissipation during fracture of fiber-reinforced ultra-high-performance

Eric N. LANDIS, Roman KRAVCHUK, Dmitry LOSHKOV

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 190-200 doi: 10.1007/s11709-018-0487-1

Abstract: Cumulative AE energy was also affected commensurately.Damage was quantified in terms of internal energy dissipation due to both matrix cracking and fiber pulloutThe results showed that fiber pullout was the dominant energy dissipation mechanism; however, the sumof the internal energy dissipation measured amounted to only 60% of the total energy dissipated by thedissipation.

Keywords： ultra-high-performance concrete     concrete fracture     X-ray computed tomography     acoustic emission    

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Evaluation of a developed bypass viscous damper performance

Mahrad FAHIMINIA, Aydin SHISHEGARAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 773-791 doi: 10.1007/s11709-020-0627-2

Abstract: In this study, the dynamic behavior of a developed bypass viscous damper is evaluated. Bypass viscous damper has a flexible hose as an external orifice through which the inside fluid transfer from one side to the other side of the inner piston. Accordingly, the viscosity coefficient of the damper can be adjusted using geometrical dimensions of the hose. Moreover, the external orifice acts as a thermal compensator and alleviates viscous heating of the damper. According to experimental results, Computational Fluid Dynamic (CFD) model, a numerical formula and the simplified Maxwell model are found and assessed; therefore, the verification of numerical and computational models are evaluated for simulating. Also, a simplified procedure is proposed to design structures with bypass viscous dampers. The design procedure is applied to design an 8-story hospital structure with bypass viscous dampers, and it is compared with the same structure, which is designed with concentric braces and without dampers. Nonlinear time history analyses revealed that the hospital with viscous damper experiences less structural inelastic demands and fewer story accelerations which mean fewer demands on nonstructural elements. Moreover, seismic behaviors of nonstructural masonry claddings are also compared in the cases of hospital structure with and without dampers.

Keywords： developed viscous damper     external orifice     energy dissipation     seismic behavior     CFD model of viscous damper    

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Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 763-779 doi: 10.1007/s11709-023-0917-6

Abstract: Test results show that the strata restraint effect effectively improves the energy dissipation capacity

Keywords： underground structures     precast sidewall specimen     seismic test method     bearing capacity     energy dissipation    

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Behaviour of self-centring shear walls——A state of the art review

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 53-77 doi: 10.1007/s11709-022-0850-0

Abstract: are no well-established design guidelines available on the shear wall configuration with the required energydissipation system, joint’s locations and acceptance criteria for shear sliding, confinement, seismic

Keywords： self-centring shear walls     rocking walls     energy dissipation     seismic performance factors     PT loss     residual    

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Application of entransy dissipation theory in heat convection

Mingtian XU, Jiangfeng GUO, Lin CHENG,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 402-405 doi: 10.1007/s11708-009-0055-4

Abstract: In the present work, formulas for calculating the rates of the local thermodynamic entransy dissipationPractically, these results may facilitate the application of entransy dissipation theory in thermal engineering

Keywords： entransy dissipation     heat convection     heat exchanger    

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Hysteretic behavior of cambered surface steel tube damper: Theoretical and experimental research

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 606-624 doi: 10.1007/s11709-023-0925-6

Abstract: The steel tube is the main energy dissipation component and comprises a weakened segment in the middleThe result shows that the CSTD yields a stable hysteretic response and affords excellent energy dissipationCompared with equal-stiffness design steel tube dampers, the CSTD exhibits better energy dissipation

Keywords： cambered surface steel tube damper     energy dissipation capacity     finite element model     hysteretic performance    

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Parametric computational study on butterfly-shaped hysteretic dampers

Ali Reza FARZAMPOUR, Matthew Roy EATHERTON

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1214-1226 doi: 10.1007/s11709-019-0550-6

Abstract: shear force, the accumulation of plastic strains through the length of links as well as the amount of energylinks to delay buckling, and designing the links to yield in the flexural mode are shown to improve energydissipation.

Keywords： structural fuse     hysteretic damper     finite element analysis     energy dissipation     initial imperfection     butterfly-shaped    

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Tensile ratcheting behaviors of bronze powder filled polytetrafluoroethylene

Wenjuan XU, Hong GAO, LiLan GAO, Xu CHEN, Yong WANG

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 103-109 doi: 10.1007/s11705-013-1315-8

Abstract: For uniaxial ratcheting test, the dissipation strain energy density (DSED) decreases rapidly in the first

Keywords： bronze filled polytetrafluoroethylene (PTFE/bronze)     uniaxial tensile behavior     ratcheting behavior     dissipationstrain energy density (DSED)    

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Effect of eccentricity in reinforced concrete beam-column-slab connection under cyclic loading

Rooh ULLAH, Amjad NASEER, Muhammad FAHIM, Mohammad ASHRAF, Eid BADSHAH

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 390-398 doi: 10.1007/s11709-021-0690-3

Abstract: The damage pattern, performance levels, displacement ductility ( ), energy dissipation, and connectiondecreased by 43%, and the energy dissipation capacity decreased by 40% in specimen 2 with higher eccentricity

Keywords： corner connection     eccentricity     strength degradation     stiffness degradation     energy dissipation     performance    

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Numerical analysis of vehicle-bridge coupling vibration concerning nonlinear stress-dependent damping

Pengfei LI; Jinquan ZHANG; Shengqi MEI; Zhenhua DONG; Yan MAO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 239-249 doi: 10.1007/s11709-021-0804-y

Abstract: Damping is known to have a considerable influence on the dynamic behavior of bridges. The fixed damping ratios recommended in design codes do not necessarily represent the complicated damping characteristics of bridge structures. This study investigated the application of stress-dependent damping associated with vehicle-bridge coupling vibration and based on that investigation proposed the stress-dependent damping ratio. The results of the investigation show that the stress-dependent damping ratio is significantly different from the constant damping ratio (5%) defined in the standard specification. When vehicles travel at speeds of 30, 60, and 90, the damping ratios of the bridge model are 3.656%, 3.658%, and 3.671%, respectively. The peak accelerations using the regular damping ratio are 18.9%, 21.3%, and 14.5% of the stress-dependent damping ratio, respectively. When the vehicle load on the bridge is doubled, the peak acceleration of the mid-span node increases by 5.4 times, and the stress-related damping ratio increases by 2.1%. A corrugated steel-web bridge is being used as a case study, and the vibration response of the bridge is compared with the measured results. The acceleration response of the bridge which was calculated using the stress-dependent damping ratio is significantly closer to the measured acceleration response than that using the regular damping ratio.

Keywords： vehicle-bridge vibration system     dynamic analysis     stress-dependent damping     energy dissipation    

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Cutting heat dissipation in high-speed machining of carbon steel based on the calorimetric method

QUAN Yanming, HE Zhenwei, DOU Yong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 175-179 doi: 10.1007/s11465-008-0022-5

Abstract: The cutting heat dissipation in chips, workpiece, tool and surroundings during the high-speed machining

Keywords： cutting system     medium     temperature     flux     tool    

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Numerical study of the cyclic load behavior of AISI 316L stainless steel shear links for seismic fuse device

Ruipeng LI,Yunfeng ZHANG,Le-Wei TONG

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 414-426 doi: 10.1007/s11709-014-0276-4

Abstract: This paper presents the results of nonlinear finite element analyses conducted on stainless steel shear links. Stainless steels are attractive materials for seismic fuse device especially for corrosion-aware environment such as coastal regions because they are highly corrosion resistant, have good ductility and toughness properties in combination with low maintenance requirements. This paper discusses the promising use of AISI 316L stainless steel for shear links as seismic fuse devices. Hysteresis behaviors of four stainless steel shear link specimens under reversed cyclic loading were examined to assess their ultimate strength, plastic rotation and failure modes. The nonlinear finite element analysis results show that shear links made of AISI 316L stainless steel exhibit a high level of ductility. However, it is also found that because of large over-strength ratio associated with its strain hardening process, mixed shear and flexural failure modes were observed in stainless steel shear links compared with conventional steel shear links with the same length ratio. This raises the issue that proper design requirements such as length ratio, element compactness and stiffener spacing need to be determined to ensure the full development of the overall plastic rotation of the stainless steel shear links.

Keywords： hysteretic damper     eccentrically braced frame     energy dissipation     seismic     stainless steel     shear link    

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Compressive and cyclic flexural response of double-hooked-end steel fiber reinforced concrete

Demewoz W. MENNA; Aikaterini S. GENIKOMSOU; Mark F. GREEN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 9,   Pages 1104-1126 doi: 10.1007/s11709-022-0845-x

Abstract: compressive strain (ductility), the tensile strength, and the cyclic flexural strength and cumulative energydissipation characteristics of the SFRC.Among the 4D fibers, the mixtures with the larger steel fibers showed higher flexural strength and more energydissipation compared to the SFRCs with smaller size fibers.

Keywords： steel fiber reinforced concrete     fiber geometry     cyclic loading     energy dissipation     finite element modeling    

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Title Author Date Type Operation

Determination of energy dissipation of a spider silk structure under impulsive loading

Jorge ALENCASTRE,Carlos MAGO,Richard RIVERA

Journal Article

Aseismic smart building isolation systems under multi-level earthquake excitations: Part II, energy-dissipation

Min-Ho CHEY,J. Geoffrey CHASE,John B. MANDER,Athol J. CARR

Journal Article

Experimental investigations of internal energy dissipation during fracture of fiber-reinforced ultra-high-performance

Eric N. LANDIS, Roman KRAVCHUK, Dmitry LOSHKOV

Journal Article

Evaluation of a developed bypass viscous damper performance

Mahrad FAHIMINIA, Aydin SHISHEGARAN

Journal Article

Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations

Journal Article

Behaviour of self-centring shear walls——A state of the art review

Journal Article

Application of entransy dissipation theory in heat convection

Mingtian XU, Jiangfeng GUO, Lin CHENG,

Journal Article

Hysteretic behavior of cambered surface steel tube damper: Theoretical and experimental research

Journal Article

Parametric computational study on butterfly-shaped hysteretic dampers

Ali Reza FARZAMPOUR, Matthew Roy EATHERTON

Journal Article

Tensile ratcheting behaviors of bronze powder filled polytetrafluoroethylene

Wenjuan XU, Hong GAO, LiLan GAO, Xu CHEN, Yong WANG

Journal Article

Effect of eccentricity in reinforced concrete beam-column-slab connection under cyclic loading

Rooh ULLAH, Amjad NASEER, Muhammad FAHIM, Mohammad ASHRAF, Eid BADSHAH

Journal Article

Numerical analysis of vehicle-bridge coupling vibration concerning nonlinear stress-dependent damping

Pengfei LI; Jinquan ZHANG; Shengqi MEI; Zhenhua DONG; Yan MAO

Journal Article

Cutting heat dissipation in high-speed machining of carbon steel based on the calorimetric method

QUAN Yanming, HE Zhenwei, DOU Yong

Journal Article

Numerical study of the cyclic load behavior of AISI 316L stainless steel shear links for seismic fuse device

Ruipeng LI,Yunfeng ZHANG,Le-Wei TONG

Journal Article

Compressive and cyclic flexural response of double-hooked-end steel fiber reinforced concrete

Demewoz W. MENNA; Aikaterini S. GENIKOMSOU; Mark F. GREEN

Journal Article