A simplified reinforcing steel model suitable for cyclic loading including ultra-low-cycle fatigue effects

Mendes, Luís Augusto Mattos; Castro, Luís Filipe

doi:10.1016/j.engstruct.2014.02.031

Cited by 19 publications

(16 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The identifier for the specimen number corresponds to the loading condition; for instance, PB04 and PB10 mean that the tests for PB specimens were controlled by total strain amplitudes of 0.004 and 0.010, respectively. The meanings of the symbols in Table 2 are the same as those in Equations (1) and (2). For either loading conditions, ∆ε 2 , ∆ε e 2 , ∆ε p 2 and ∆σ 2 are obtained based on the stable hysteresis loop curve, as shown in Figure 3.…”

Section: Elcf Testmentioning

confidence: 99%

“…Also listed in this table are the cyclic stress-strain properties when the stable hysteresis loop curve is fitted into the The fatigue properties of the welded structural details, which are correlated by the Manson-Coffin equation expressed by Equation (1), are listed in Table 3. Also listed in this table are the cyclic stress-strain properties when the stable hysteresis loop curve is fitted into the Ramberg-Osgood relation expressed by Equation (2). The fatigue and cyclic stress-strain properties are fitted using General model Power1 in MATLAB, that is,…”

Section: Elcf Testmentioning

confidence: 99%

“…The value of L is zero for materials without a nonproportional additional hardening effect, and the value of the modified coefficient (1 + L · Φ) in Equation (12) is then zero, even under nonproportional loading. This means that Equation (12) is similar to the Ramberg-Osgood relation, i.e., Equation (2). That is to say, Equation (12) cannot accurately reflect the effect of additional hardening when applied to fatigue life prediction for a material without a nonproportional additional hardening effect.…”

Section: Parameters Of the Modified Fs Modelmentioning

confidence: 99%

“…Steel beam-to-column welded joints may undergo extremely-low-cycle fatigue (ELCF) during strong seismic activity [1][2][3], which is usually characterized by a few reverse loading cycles (in general, less than 20) with large strain amplitudes before failure. Welded joints are crucial components in antiseismic steel structures; for instance, the 1994 Northridge and 1995 Kobe earthquakes which caused severe damage to steel structures, where cracks were initiated in welded joints and eventually caused the collapse of whole structures [4,5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Extremely-Low-Cycle Fatigue Damage for Beam-to-Column Welded Joints Using Structural Details

Huang

Zhao

2020

Materials

View full text Add to dashboard Cite

The multiaxial fatigue critical plane method can be used to evaluate the extremely-low-cycle fatigue (ELCF) damage of beam-to-column welded joints in steel frameworks subjected to strong seismic activity. In this paper, fatigue damage models using structural detail parameters are studied. Firstly, the fatigue properties obtained from experiments are adopted to assess ELCF life for steel frameworks. In these experiments, two types of welded specimens, namely, plate butt weld (PB) and cruciform load-carrying groove weld (CLG), are designed according to the structural details of steel beam and box column joints, in which both structural details and welded factors are taken into account. Secondly, experiments are performed on three full-scale steel welded beam-to-column joints to determine the contribution of stress and/or strain to damage parameters. Finally, we introduce a modification of the most popular fatigue damage model of Fatemi and Socie (FS), modified by us in a previous study, for damage evaluation, and compare this with Shang and Wang (SW) in order to examine the applicability of the fatigue properties of PB and CLG. This study shows that the modified FS model using the fatigue properties of CLG can predict the crack initiation life and evaluate the damage of beam-to-column welded joints, and can be subsequently used for further investigation of the damage evolution law.Materials 2020, 13, 1768 2 of 21 components [10][11][12], energy dissipation [13][14][15][16][17], or the combination of these two variables [18][19][20][21][22] as a seismic damage parameter. In addition, numerous experiments have also been carried out to evaluate the structural damage of seismic excitations. However, existing studies mostly focus on the ductility and energy dissipation capability of the whole structure or structural component, and ignore the local details of welded joints and the fatigue crack initiation mechanics during the ELCF fracture process, which may lead to inaccurate damage evaluation results.With the application of the micromechanical approach in fracture predictions of welded joints, researchers have paid attention to investigating the fatigue failure behavior [23][24][25][26][27] and severe seismic damage assessments [28][29][30] from the aspect of structural details. From these aspects, the results can be more suitable than traditional methods [26,28]. However, welded joints are always in multiaxial and nonproportional stress states due to their geometrically discontinuous properties, which result in more fatigue damage [31]. Therefore, a suitable model is necessary to correctly describe the effect of multiaxial and nonproportional stress states in fracture predictions for welded joints. The widely accepted critical plane approach is used to determine the damage parameter in a multiaxial nonproportional fatigue damage model. The critical plane approach usually uses the maximum shear plane as the critical damage plane, and takes the maximum shear strain γ max and normal strain ε n on the critical plane as th...

show abstract

Section: Elcf Testmentioning

confidence: 99%

Section: Elcf Testmentioning

confidence: 99%

Section: Parameters Of the Modified Fs Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Extremely-Low-Cycle Fatigue Damage for Beam-to-Column Welded Joints Using Structural Details

Huang

Zhao

2020

Materials

View full text Add to dashboard Cite

show abstract

“…During the past decades, many researchers have made important contribution to the separated effect of corrosion [19][20][21][22][23] and fatigue [24][25][26][27]. Apostolopoulos [28,29] used the low cycle fatigue test of steel to assess the effect of accumulating corrosion damage.…”

Section: Introductionmentioning

confidence: 99%

Fatigue life prediction for aging RC beams considering corrosive environments

Xiang

Wang

et al. 2014

Engineering Structures

View full text Add to dashboard Cite

Performance based assessment of steel frame structures by different material models

Işık

Özdemir

2017

Int J Steel Struct

View full text Add to dashboard Cite

A simplified reinforcing steel model suitable for cyclic loading including ultra-low-cycle fatigue effects

Cited by 19 publications

References 14 publications

Extremely-Low-Cycle Fatigue Damage for Beam-to-Column Welded Joints Using Structural Details

Extremely-Low-Cycle Fatigue Damage for Beam-to-Column Welded Joints Using Structural Details

Fatigue life prediction for aging RC beams considering corrosive environments

Performance based assessment of steel frame structures by different material models

Contact Info

Product

Resources

About