Fracture prediction of welded steel connections using traditional fracture mechanics and calibrated micromechanics based models

Wang, Yuanqing; Zhou, Hui; Shi, Yongjiu; Xiong, Jiechao

doi:10.1007/s13296-011-3010-2

Cited by 64 publications

(15 citation statements)

References 23 publications

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“…According to this model, ductile crack initiation occurs when the equivalent plastic strain exceeds a critical value of the plastic strain corresponding to the void size exceeding a critical void size. Wang et al () examined VGM for the fracture prediction of beam‐to‐column connections in SMRFs; they showed that VGM can predict the fracture of welded connection with good accuracy. The crack initiation could be predicted with reasonable accuracy by defining a threshold value

ε_{e q v}^{p l}

for the given stress–strain state (Kanvinde and Deierlein , Wang et al ).…”

Section: Results and Design Implicationmentioning

confidence: 99%

“…Wang et al () examined VGM for the fracture prediction of beam‐to‐column connections in SMRFs; they showed that VGM can predict the fracture of welded connection with good accuracy. The crack initiation could be predicted with reasonable accuracy by defining a threshold value

ε_{e q v}^{p l}

for the given stress–strain state (Kanvinde and Deierlein , Wang et al ). Ghobadi et al () showed experimentally and analytically that the seismic performance of T‐stiffener could be improved by modifying the T‐stiffener and beam flange connection; in their study, the rupture index and triaxiality ratio and equivalent plastic strain index were used as rupture indicators.…”

Section: Results and Design Implicationmentioning

confidence: 99%

See 1 more Smart Citation

Analytical investigation on performance of special moment-resisting connections with unequal beam depths

Jazany

Esmaeily

Hashemi

et al. 2015

Struct. Design Tall Spec. Build.

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SUMMARYThis study considers the effect of detailing of an interior beam to column connection with unequal beam depths on seismic performance of special moment-resisting frame (SMRF), which has not explicitly been taken into account, despite its possible occurrence in engineering practice, by the current codes and provisions. Studied detailing consists of a continuity plate arrangement, cover plate, flange plate and haunch connection system as alternatives in order to connect a shallow beam and a deep beam to column. To improve the understanding of seismic performance in SMRF connections, coordinated analytical and experimental studies have been conducted to examine the effect of different geometries and the mentioned alternatives on the seismic performance of SMRF with unequal beam depths. This work describes the analytical studies and includes a summary of the experimental results used in the development and validation of the analytical models; the experiment and analyses show that some detailing could provide ductile behavior with a total storey drift angle of 0.06 rad before experiencing 20% strength degradation while other detailing would not satisfy this criterion.

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ε_{e q v}^{p l}

for the given stress–strain state (Kanvinde and Deierlein , Wang et al ).…”

Section: Results and Design Implicationmentioning

confidence: 99%

ε_{e q v}^{p l}

Section: Results and Design Implicationmentioning

confidence: 99%

Analytical investigation on performance of special moment-resisting connections with unequal beam depths

Jazany

Esmaeily

Hashemi

et al. 2015

Struct. Design Tall Spec. Build.

View full text Add to dashboard Cite

show abstract

“…To determine the function of D , 10 groups of standard tension experiments for Q235 steel have been conducted by Zhou et al and a nonlinear softening law of describing D is achieved,

D = 1.3 {(\frac{{\overset{u}{true}}^{italicpl}}{{\overset{u}{true}}_{f}^{italicpl}})}^{7.6} .

To perform the above described elastic–plastic and failure constitutive laws of steel material, parameters of C 2 , m , K , and η 0 should be determined firstly. In this study, C 2 = 0.63, m = 0.18, and K = 700 are adopted based on standard tension test data of open round bar for Q235 steel. η 0 = 1/3 is used as discussed previously.…”

Section: Nonlinear Numerical Modeling and Verificationmentioning

confidence: 99%

“…To perform the above described elastic-plastic and failure constitutive laws of steel material, parameters of C 2 , m, K, and η 0 should be determined firstly. In this study, C 2 = 0.63, m = 0.18, and K = 700 are adopted based on standard tension test data [33,34] of open round bar for Q235 steel.…”

Section: Determination Of Failure Evolutionmentioning

confidence: 99%

Seismic performance assessment of new dry‐assembled prefabricated composite shear wall system with beam‐only connection

Wang

Zhang

Chen

2020

Structural Design Tall Build

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Summary Two types of prefabricated composite shear wall systems were proposed using modular and separated dry‐assembled ways, respectively. The seismic performance of four composite shear wall systems, two for the modular assembly way and two for the separated assembly way, was numerically evaluated including failure mode, loading and deformation capacities, hysteresis behavior, ductility, stiffness degradation, and energy dissipation. The nonlinear numerical simulations were conducted based on plastic‐damage constitutive laws for both concrete and steel materials using ABAQUS platform, which were further verified by the experimental investigations. The results showed that the mechanical performance of the modular assembly system is superior than that of the separated assembly system. The former exhibited good bearing and deformation capacities: The peak force is enhanced by 50% on average, the ultimate drift ratio reaches an average value of 3.7%, and the ductility coefficient has an average value of 10.5. As for the same assembly way, the prefabricated system with inner steel plate appeared better seismic properties compared to that with outer steel plate. Furthermore, the modular assembly system behaved prominent energy dissipation capacity with plentiful hysteresis loops. The equivalent damping ratio of this system reaches 15.93% at the drift ratio of 2%, which is the limit drift ratio for normal buildings in rare earthquakes.

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“…The present work involves the study of the mechanical behaviour of a modified IPE 200 metal beam, one of the most common commercial beams, used in the construction of metal buildings, in order to provide for its incorporation in the initial stages of assembling a metal building [40][41][42]. The modification of beam IRE200 requires heat treatment and welding using conventional welding methods.…”

Section: Construction Of a Modified Welded Metal Beam And The Effect mentioning

confidence: 99%

A Mechanical Property, Non-Destructive Testing and Microstructural Investigation of Power Plant Mechanical Systems

Papanikolaou¹

2017

Mater. Sci. Eng. Adv. Res

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Coal or lignite thermal power stations are built next to the lignite mines and they are usually vast technological installations with a multitude of mechanical parts that need to be maintained and tested for life assessment. These include the excavating equipment, the ore crushers and belt conveyors, the furnace with its steam generating tubes and super heater coils, a steam drum and a steam turbine. Most of these are made of steel and other metal alloys and often fail due to normal service wear, bad maintenance, human error and poor material quality.The ability to extend the lifetime of a plant's power plant's mechanical system beyond the original design is of very important economic and technical significance. In recent years, various techniques have been developed for inspection and control methods to be applied so that residual life in mechanical systems of power plants and welded structures can be calculated in a timely and accurate manner. The control techniques include:• Various non-destructive tests to examine the state of a system and the possible mechanism that causes its wear and failure• Mechanical tests such as tensile, hardness, fatigue, impact and creep testing• Metallographic investigation using both optical and electron microscopy• Calculation of the operating stresses of the component, usually involving finite element analysis and a theoretical assessment of residual life depending on the wear mechanism found in the componentIn the present applied research work, the above techniques are employed in case studies on various mechanical parts from the thermal plants in the region of Western Macedonia, Greece.The purpose of the case studies was to determine the causes of mechanical failure, develop testing methods for the various parts, study the effect of material microstructure, property and processing method on part service performance and develop innovative construction methods. Case study 1Fatigue testing of reinforced-concrete steel bars to be used in the construction of the fifth power plant in the Region of Western MacedoniaThe fatigue characteristics of reinforced-concrete steel bars are usually studied with axial fatigue tests using conven tional testing machines and specimens in the as-delivered state, usually ribbed rods. The advantages of such tests include low costs and the possibility of defining test conditions precisely. However, there is a signifi cant disadvantage related to problems con nected with clamping bars in testing machines, where local stresses in bar clamping areas are responsible for the premature failure of the bars. A number of studies [1][2][3][4] con tain information about various methods to prepare the grip parts of specimens usually connected with us ing an added layer between a specimen and a testing machine jaw and/or slight machining of specimen ends. Little information is, however, available concerning the failure mechanism of untreated bars and the effectiveness of the measures mentioned.The study involves the fatigue testing of steel bars of various diamete...

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Fracture prediction of welded steel connections using traditional fracture mechanics and calibrated micromechanics based models

Cited by 64 publications

References 23 publications

Analytical investigation on performance of special moment-resisting connections with unequal beam depths

Analytical investigation on performance of special moment-resisting connections with unequal beam depths

Seismic performance assessment of new dry‐assembled prefabricated composite shear wall system with beam‐only connection

A Mechanical Property, Non-Destructive Testing and Microstructural Investigation of Power Plant Mechanical Systems

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