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The 32 m span box girder prestressing effect monitoring and creep camber control for Wuhan-Guangzhou

Song Jinxi

Strategic Study of CAE 2009, Volume 11, Issue 1,   Pages 60-66

Abstract: montoring and numerical analysis for 32 m concrete prestressed box girder prestressing and elastic camberThe effect of monitoring and analysis, based on the engineering practice, the control measures of thebox girder creep camber were put forward, which can be taken as a reference and experience guidance

Keywords: Wuhan-Guangzhou passenger express line     32 m box girder     prestressing effect monitoring     creep cambercontrol    

Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 297-307 doi: 10.1007/s11709-012-0162-x

Abstract: In the past, for simplification, creep behavior was not taken into account in research on the resistanceHowever, it was demonstrated that the effect of creep is considerable at temperatures that commonly reachThe geometric nonlinearity, material nonlinearity, high temperature creep, and temperature rate of changeFurthermore, it is demonstrated that the deflection at the midpoint of the steel beam, considering creepbehavior, is approximately 13% larger than for the situation in which creep is ignored.

Keywords: creep     plane steel frame     fire     finite element method     geometric nonlinearity    

A model for creep life prediction of thin tube using strain energy density as a function of stress triaxialityunder quasi-static loading employing elastic-creep & elastic-plastic-creep deformation

Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 181-186 doi: 10.1007/s11465-013-0257-7

Abstract:

This paper demonstrates the application of a new multiaxial creep damage model developed by authorsFor comparison, an elastic-creep and elastic-plastic-creep finite element analysis (FEA) is performed

Keywords: elastic-creep     elastic-plastic-creep     stress triaxiality     life prediction     pressure vessels     finite element    

Elevated temperature creep model of parallel wire strands

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 7,   Pages 1060-1071 doi: 10.1007/s11709-023-0981-y

Abstract: Under fire conditions, significant creep effects occur, reducing the prestress and influencing the mechanicalAs there is no existing approach to analyze their creep behavior, this study experimentally investigatedthe elevated temperature creep model of PWSs.It was concluded that the temperature level had a more significant effect on the creep strain than thestress level, and 450 °C was the key segment point where the creep rate varied significantly.

Keywords: parallel wire strands     experimental study     elevated temperature creep model    

Effect of concrete creep and shrinkage on tall hybrid-structures and its countermeasures

Pusheng SHEN, Hui FANG, Xinhong XIA

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 234-239 doi: 10.1007/s11709-009-0020-7

Abstract: Based on the concrete creep and shrinkage calculation formula in American Concrete Institute (ACI) code, with the assumption that loads are increased linearly in members, the creep and shrinkage effects ofThe effects of steel ratio on members creep are analyzed by age-adjusted module method (AEMM).

Keywords: creep     shrinkage     construction process     hybrid-structure    

Aerodynamic performance of bowed compressor cascades with different camber angles

CHEN Shaowen, CHEN Fu, WANG Keli, GU Jun, WANG Zhongqi

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 306-312 doi: 10.1007/s11708-008-0056-8

Abstract: positively bowed blade on the aerodynamic performance of annular compressor cascades with different camberoptimum bowed height decrease because of the increased losses at the mid-span with the increase of the camberdistribution along the radial direction exists on the suction surface of the straight cascade with larger camberUnder 60° camber angle, flow behavior near the end-wall region of some bowed cascades even deteriorates

Keywords: increase     different     blockage     increased     ink-trace    

Creep-fatigue crack growth behavior in GH4169 superalloy

Dianyin HU, Xiyuan WANG, Jianxing MAO, Rongqiao WANG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 369-376 doi: 10.1007/s11465-018-0489-7

Abstract: This study aims to examine the crack growth behavior of turbine disc GH4169 superalloy under creep-fatigueThe grain boundaries oxidize during the dwell process, thereby inducing an intergranular creep-fatigueobservation confirmed that the small grain size and high volume fraction of the d phase led to a fast creep-fatigue

Keywords: crack growth rate     creep-fatigue     GH4169 superalloy     CT specimen     dwell time    

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 byThe effects of the manifold wall thickness and creep properties of brazing filler metal on the operatingDecreasing the minimum creep strain rate with the enhancement of the creep strength of the brazing fillermetal presents an obvious effect on the creep life of the recuperator.between the minimum creep rate of the filler and base metal is reduced by 20%.

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

A comparative study of the mechanical properties, fracture behavior, creep, and shrinkage of chemically

Mahdi AREZOUMANDI, Mark EZZELL, Jeffery S VOLZ

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 36-45 doi: 10.1007/s11709-014-0243-0

Abstract: results of an experimental investigation that compares the mechanical properties, fracture behavior, creepthat the SCC and CC mixes had virtually identical tensile splitting strengths, flexural strengths, creep

Keywords: admixture     conventional concrete (CC)     creep     fracture mechanic     mechanical Properties     self-consolidating    

Experimental research on the creep behavior and bearing capacity of repeatedly prestressed concrete beam

SHAO Xudong, LI Lifeng, YANG Jianjun

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 305-311 doi: 10.1007/s11709-007-0040-0

Abstract: or short span prestressed concrete beam bridges, there are always many serious problems, such as the camberFurthermore, a kind of computational formula to calculate creep strain and deformation due to repeatedbright application prospect for this new structure for medium and short span prestressed beam bridges to control

Keywords: computational     cracking     technology     prestressed concrete     application prospect    

Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 341-346 doi: 10.1007/s11465-010-0096-8

Abstract: This paper presents experimental and modeling study of creep and recovery behaviors of magneto-rheologicalThe effects of the magnetic field and stress on MRE creep behaviors were discussed.Moreover, a four-parameter viscoelastic model was developed to describe MRE creep behaviors.between the experimental results and the modeling predictions indicates that the model can predict MRE creep

Keywords: magneto-rheological elastomers (MREs)     creep     recovery     linear viscoelastic model    

Creep of brazed plate-fin structures in high temperature compact heat exchangers

Shantung TU, Guoyan ZHOU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 355-362 doi: 10.1007/s11465-009-0065-2

Abstract: However, the creep design of the high temperature compact heat exchangers has been a primary concernbecause the working temperature can be well above the creep limit of the materials.To establish the high temperature design criterion for compact heat exchangers, creep behavior of theThe creep damage evolution inside the brazed joint is studied by coupling the finite element method withThe significant effect of creep property mismatch in the brazed joint on the creep strength is demonstrated

Keywords: compact heat exchanger     creep     damage     brazing joint    

Theoretical Analysis of Creep and Shrinkage Effects in SRC Arch Bridge

Xie Xiaoli,Qin Rong,Peng Wenli,Deng Zhiheng

Strategic Study of CAE 2001, Volume 3, Issue 3,   Pages 80-84

Abstract:

In this paper, the concrete creep theory, compatibility equations, median theory and equilibrium conditionsare used and the elastic aftereffect of concrete and creep shrinkage features of concrete restrainedaround are considered to develop formulae of cross-section stress redistribution resulted from concrete creepconvenient to use are applied to Wanxian Changjiang Bridge (420m in span) for the model test analysis of creep

Keywords: SRC arch bridge     creep and shrinkage     initial stress     stress redistribution    

Influence of pressure and density on the rheological properties of rockfills

Erich BAUER, Zhongzhi FU, Sihong LIU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 25-34 doi: 10.1007/s11709-012-0143-0

Abstract: Long-term deformations of rockfill dams can be related to the type of dam, the pre-compaction achieved during the construction of the dam, the history of loading events, the rheological properties of the rockfill material used, the seepage behavior caused by defects of the sealing, the interactions of the dam building with the foundation, and the hydrothermal phenomena of the stressed rockfill material. The present paper investigates the rheological properties of coarse grained rockfill materials using a hypoplastic constitutive model. Particular attention is paid to wetting deformation under different deviatoric loading states and pre-compactions. To quantify the state of weathering a so-called “solid hardness” is used in the sense of a continuum description. It is shown that an appropriate modeling of wetting deformations requires a unified description of the interaction at least between the state of weathering, the stress state, the density and the rate of deformation. The results obtained from the numerical simulations are compared with available experimental data for a rockfill material used in Xiaolangdi earth dam.

Keywords: rockfills     solid hardness     wetting deformation     hypoplasticity     creep    

An Investigation of Creep Resistance in Grade 91 Steel through Computational Thermodynamics Article

Andrew Smith, Mohammad Asadikiya, Mei Yang, Jiuhua Chen, Yu Zhong

Engineering 2020, Volume 6, Issue 6,   Pages 644-652 doi: 10.1016/j.eng.2019.12.004

Abstract: is widely accepted that the stabilities of the secondary phases in Gr.91 steel are critical to the creepOverall, the simulations presented in this paper explain the mechanisms that can affect the creep resistanceof Gr.91 steel, and can offer a possible solution to the problem of how to increase creep resistanceThe simulation results from this work provide guidance for future alloy development to improve creep

Keywords: Grade 91 steel     Creep resistance     Ferritic-martensitic steels     Welding microstructure     Computational    

Title Author Date Type Operation

The 32 m span box girder prestressing effect monitoring and creep camber control for Wuhan-Guangzhou

Song Jinxi

Journal Article

Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Journal Article

A model for creep life prediction of thin tube using strain energy density as a function of stress triaxialityunder quasi-static loading employing elastic-creep & elastic-plastic-creep deformation

Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY

Journal Article

Elevated temperature creep model of parallel wire strands

Journal Article

Effect of concrete creep and shrinkage on tall hybrid-structures and its countermeasures

Pusheng SHEN, Hui FANG, Xinhong XIA

Journal Article

Aerodynamic performance of bowed compressor cascades with different camber angles

CHEN Shaowen, CHEN Fu, WANG Keli, GU Jun, WANG Zhongqi

Journal Article

Creep-fatigue crack growth behavior in GH4169 superalloy

Dianyin HU, Xiyuan WANG, Jianxing MAO, Rongqiao WANG

Journal Article

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

Journal Article

A comparative study of the mechanical properties, fracture behavior, creep, and shrinkage of chemically

Mahdi AREZOUMANDI, Mark EZZELL, Jeffery S VOLZ

Journal Article

Experimental research on the creep behavior and bearing capacity of repeatedly prestressed concrete beam

SHAO Xudong, LI Lifeng, YANG Jianjun

Journal Article

Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Journal Article

Creep of brazed plate-fin structures in high temperature compact heat exchangers

Shantung TU, Guoyan ZHOU

Journal Article

Theoretical Analysis of Creep and Shrinkage Effects in SRC Arch Bridge

Xie Xiaoli,Qin Rong,Peng Wenli,Deng Zhiheng

Journal Article

Influence of pressure and density on the rheological properties of rockfills

Erich BAUER, Zhongzhi FU, Sihong LIU

Journal Article

An Investigation of Creep Resistance in Grade 91 Steel through Computational Thermodynamics

Andrew Smith, Mohammad Asadikiya, Mei Yang, Jiuhua Chen, Yu Zhong

Journal Article