Failure analysis on 20MnTiB steel high-strength bolts in steel structure

Wen, Juan; Liu, Lan; Jiao, Qingrui; Yang, Jinlong; Liu, Qingcai; Lin, Chao

doi:10.1016/j.engfailanal.2020.104820

Cited by 21 publications

(6 citation statements)

References 24 publications

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“…High-strength bolts have the characteristics of a simple installation, stable quality, high construction efficiency, and convenient disassembly. They have become the main connection method for steel structures [ 1 , 2 , 3 , 4 ]. However, when they are applied to extremely harsh environments, such as cross-sea bridges, offshore platforms, offshore wind power, and petrochemicals, they will face the risk of corrosion and damage [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Fatigue Performance and Corrosion Resistance of 304/45 Bimetallic Composite Bolts

Zhou

Ding

2023

Materials

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This paper utilized a hot-rolling process to produce composite rods and subsequently manufactured 304/45 composite bolts through the process of drawing and thread rolling. The study focused on examining the microstructure, fatigue performance, and corrosion resistance of these composite bolts. Additionally, the impacts of quenching and tempering on the fatigue performance of the composite bolts were explored and compared to the performance of 304 stainless steel (SS) bolts and Grade 6.8 35K carbon steel (CS) bolts. The results indicate that the SS cladding of the cold-worked 304/45 composite (304/45-CW) bolts was primarily strengthened by the cold deformation mechanism, which resulted in high microhardness, averaging 474 HV. At a maximum surface bending stress of 300 MPa, the fatigue cycles of the 304/45-CW reached 342,600 cycles at a 63.2% failure probability, which was significantly higher than that of commercial 35K CS bolts. The S-N fatigue curves showed that the fatigue strength of the 304/45-CW bolts was approximately 240 MPa, but the fatigue strength of the quenched and tempered 304/45 composite (304/45-QT) bolts decreased significantly to 85 MPa, due to the loss of the cold deformation strengthening effect. The corrosion resistance of the SS cladding of the 304/45-CW bolts was impressive and remained largely unaffected by carbon element diffusion.

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Section: Introductionmentioning

confidence: 99%

A Study on the Fatigue Performance and Corrosion Resistance of 304/45 Bimetallic Composite Bolts

Zhou

Ding

2023

Materials

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“…In the generally available scientific and technical literature, the effect of various atmospheric conditions on the tightening behaviour of bolted connections has not been exhaustively studied. Wen et al [14] identified corrosion occurring under the influence of the external environment as one of the factors that alter the mechanical properties of bolts, accelerating their failure. This phenomenon also occurs in the case of galvanised bolts [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Atmospheric Conditions on the Tightening Behaviour of HV Galvanised Bolts in Structural Bolt Sets

Dubiel,

Grzejda

2023

Lubricants

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The aim of this article is to investigate the effect of atmospheric conditions on the tightening behaviour of HV bolts in structural bolt sets. The article describes the results of experimental tests carried out for bolt sets of a selected type. The parts of the joined sets were stored according to the specified six different conditions for four weeks before assembly. Paper, cardboard boxes and anticorrosion foils were used as protection against atmospheric conditions. The behaviour of unassembled and assembled bolt sets was also taken into account. The variation in the friction coefficient depending on the clamping force and storage conditions of the bolt sets was demonstrated. This applies both to the contact between the joining elements on the threaded surfaces and to the area between the bolt head and the bearing surface of the nut and washer.

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“…Teng et al determined the axial force on stay cables whilst accounting for their bending stiffness and rotational end restraints by free vibration test [14]. Other researchers have introduced the design method for the overall strength and stability of steel structures [15][16][17][18] and used advanced structural inspection and evaluation techniques, such as 3D3S modelling inspection [19][20][21], and introduced the stress loss and strength failure detection methods of some high-strength bolts and steel [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Application and Practice of Variable Axial Force Cable in Powerhouse Truss Reinforcement System

Shen

Hong

et al. 2023

Buildings

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Long-span steel structure trusses are widely used in factory buildings. However, with the increase in service time and dynamic load fatigue, transverse cracks at the bottom of the middle span and oblique deformation of the abdomen during the operation process may appear in a considerable part of long-span trusses with dynamic load. The U-shaped cracks at the bottom and belly, as well as the mid-span down deflection of the main truss, can also reduce the functionality of the factory building truss structure and limit the original crane load, thus affecting the normal safety and durability of the structure. Therefore, the principle of variable axial force cable system in the long-span factory building truss structure and 3D3S software modelling were applied. Analysing and studying the reinforcement method of large-span powerhouse trusses can provide practical experience for subsequent similar projects. In view of the above phenomenon, the large-span powerhouse trusses of Hongcheng Powerhouse No. 1 and No. 2, located in Tonglu, Zhejiang Province, were used as the research objects, and the variable axial force cable method was proposed to strengthen and lift the load. Considering the span of the powerhouse truss, a cable system with 22 m and a controlling force of 400 kN was proposed for Powerhouse 1, and a cable system with a variable axial force of 24 m was proposed for Powerhouse 2. The force model of large-span trusses was established by using the finite element method, which is commonly used to analyse the force of the truss. The influence of the reinforcement effect was analysed under two working conditions and compared from three aspects: stiffness, bearing capacity and stability. Furthermore, the phenomenon of uneven stress distribution was analysed. The stress distribution characteristics of each node were understood by simulating the most disadvantageous node plates with the greatest internal force before and after reinforcement.

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Failure analysis on 20MnTiB steel high-strength bolts in steel structure

Cited by 21 publications

References 24 publications

A Study on the Fatigue Performance and Corrosion Resistance of 304/45 Bimetallic Composite Bolts

A Study on the Fatigue Performance and Corrosion Resistance of 304/45 Bimetallic Composite Bolts

Effect of Atmospheric Conditions on the Tightening Behaviour of HV Galvanised Bolts in Structural Bolt Sets

Application and Practice of Variable Axial Force Cable in Powerhouse Truss Reinforcement System

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