Seismic behaviour of eccentrically compressed steel-box bridge-pier columns with embedded energy-dissipating shell plates

Li, Haifeng; Lv, Kunde; Cui, Runsheng

doi:10.1007/s10518-020-00830-2

Cited by 14 publications

(6 citation statements)

References 39 publications

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“…Strain stretching was used to control the strain amplitude of the finite element model. Similar to the experimental study, when the tensile strength of the finite element model drops by 15%, it is considered that the model has undergone low-cycle fatigue failure [19]. It is worth noting that the finite element simulation part does not consider the impact of welding.…”

Section: Finite Element Modelmentioning

confidence: 99%

Mechanical Behavior of Q460 High‐Strength Steel under Low‐Cycle Fatigue Loading

Han

Chang

et al. 2022

Advances in Civil Engineering

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To investigate the mechanical properties of Q460 high-strength steel under repeat tensile loading, 45 specimens were prepared for repeated tensile tests. The specimens are tested under 16 different loading regimes. The effects of welded joints, specimen shape and dimensions, and loading modes on the mechanical properties of the steel were analyzed. In addition, a finite element model of the specimen under cyclic load was established with ANSYS and the numerical results were compared with those of the experimental tests. This finite element model can accurately simulate the deformation characteristics of Q460 steel specimens. Experimental studies have found that the welded joints have adverse effects on the mechanical properties of this material. The cumulative effect of fatigue damage on the welded specimens was significant, and the ductility of welded specimens was poor under cyclic loading. The loading mode had a major impact on the results of the material tests. As the number of loading cycles increased, the cumulative effect of fatigue damage on the specimens was more evident, and the length, size, and cross-sectional shape of the tensile zone all affected the stiffness of the specimen. Finally, based on the experimental research and numerical analysis results, a design formula for the tensile strength of Q460 steel under repeated loading was proposed. This formula can serve as a reference for the application of Q460 steel in seismic engineering.

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Section: Finite Element Modelmentioning

confidence: 99%

Mechanical Behavior of Q460 High‐Strength Steel under Low‐Cycle Fatigue Loading

Han

Chang

et al. 2022

Advances in Civil Engineering

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“…e corresponding value of δ/δ y was the displacement ratio of the given cycle δ displacement to the first cycle δ y displacement. e value of K j [33] can be obtained by using the following equation.…”

Section: Stiffness Degradationmentioning

confidence: 99%

“…e factor of λ j [33] was applied to demonstrate the strength degradation at a given load of j, which can be obtained from equation (3).…”

Section: Strength Degradationmentioning

confidence: 99%

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Seismic Behavior of Box Steel Bridge Pier with Built-In Energy Dissipation Steel Plates

Han

Jiang²,

Zheng

et al. 2022

Advances in Materials Science and Engineering

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Based on the design concept of earthquake-resilient structure, a new-type of box-shaped steel piers with embedded energy-dissipating steel plates was proposed. Quasi-static tests of 6 box-shaped steel pier specimens under variable axial pressure and cyclic horizontal loading were carried out. By analyzing the failure mode, load-displacement hysteretic curve, skeleton curve, displacement ductility coefficient, stiffness degradation characteristics, strength degradation coefficient, and cumulative hysteretic energy, the effects of setting energy-dissipating steel plate, axial compression ratio, and thickness of energy dissipation steel plates on the seismic performance of new-type steel piers were discussed. Finite element models of steel bridge piers were established and compared with the test results. The analysis results using FEM agree well with the test results. Results show that the setting of energy-dissipating steel plates can effectively improve the ductility, deformation capacity, and energy-dissipating capacity of box-shaped steel piers, and effectively delay buckling deformation and cracking of wall plates. The steel plate near the bolt hole of the wall plate at the root of the new-type of box-shaped steel piers is easy to crack due to stress concentration, resulting in a rapid reduction of the maximum bearing capacity of the specimens. With the increase of axial compression ratio, the bearing capacity, energy-dissipating capacity, and earthquake-resilient capacity of the specimens increase. The smaller the thickness of the replaceable energy-dissipating steel plates, the smaller the bearing capacity and faster the stiffness degradation of the specimens become, while the ductility and energy-dissipating capacity of the specimens are improved. The axial compression ratio and the thickness of the energy-dissipating steel plate have relatively little effect on the strength degradation of the specimens. In order to facilitate the popularization and application of the new-type steel piers, formulas were also established to calculate the bearing capacity and displacement ductility factor of the new-type of box-shaped steel piers.

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“…Jiang et al [8,9] proposed a new type of prefabricated joint with replaceable energy-consuming components to quickly repair a structure after earthquakes. In order to achieve the rapid repair of the mechanical performance of portal steel bridge column after earthquakes, Li et al [10][11][12] proposed the installation of a replaceable steel pier at root of portal steel bridge column, and some new box steel columns were tested and numerically analysed.…”

Section: Introductionmentioning

confidence: 99%

Compression Performance of Newly Designed Replaceable Tubular Steel Piers

Zhao

Sun

et al. 2020

Advances in Materials Science and Engineering

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To rapidly restore the seismic behaviour of a portal steel bridge column after an earthquake, the installation of replaceable tubular steel piers at the root of a portal steel bridge column is proposed herein. In this study, various tubular steel piers with different structural measures were designed; an axial compression test and a numerical simulation of the newly designed tubular steel piers were performed. The effects of parameters such as the structure of stiffening rib, the strength of LYP steel plate, the size of low-yield-point (LYP) steel plate, and the size of outer constrained steel plate were discussed. The results indicate that local buckling of steel tubular plates is likely to occur at the upper or lower end of those specimens, which belong to type II-A specimens with stiffened LYP steel tubular plates or type III-A specimens with T-shaped LYP steel plates, respectively. This led to the LYP steel plate cannot fully display its function. For type III-B and III-C specimens with embedded LYP steel plates and constrained steel plates on both sides, when the outer steel tubular plates buckle, the internally constrained LYP steel plates provide support for the outer steel tubular plates. The plastic deformation of the specimens is sufficient, and the deformation performance is good. For type IV-A specimens with LYP steel tubular plates and constrained steel plates on both sides, the mechanical behaviour of the new tubular steel piers is significantly improved, and increasing the height of the constrained LYP steel tubular plate can improve the compressive behaviour of the new tubular steel pier. Considering the effect of the steel plate thickness on bearing capacity and deformation performance, the thickness tw of the outer constrained steel plate should be equal to the thickness t of the common steel tubular plate, and the thickness tf of the LYP steel tubular plate should satisfy t ≤ tf ≤ 2t. Finally, a design formula is proposed to calculate the axial bearing capacity of newly designed tubular steel piers with constrained LYP steel plates.

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Seismic behaviour of eccentrically compressed steel-box bridge-pier columns with embedded energy-dissipating shell plates

Cited by 14 publications

References 39 publications

Mechanical Behavior of Q460 High‐Strength Steel under Low‐Cycle Fatigue Loading

Mechanical Behavior of Q460 High‐Strength Steel under Low‐Cycle Fatigue Loading

Seismic Behavior of Box Steel Bridge Pier with Built-In Energy Dissipation Steel Plates

Compression Performance of Newly Designed Replaceable Tubular Steel Piers

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