Experimental cyclic behavior and constitutive modeling of high strength structural steels

Hai, Letian; Sun, Fei‐Fei; Zhao, Chen; Li, Guoqiang; Wang, Yan Bo

doi:10.1016/j.conbuildmat.2018.09.028

Cited by 64 publications

(17 citation statements)

References 34 publications

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“…e Q690D exhibits appreciable strength but poor deformability. A yield-totensile strength ratio of more than 0.9 and the elongation ratio lower than 20% were obtained from the experiments [17]. e deformability of Q690D is not as good as the steel materials popularly used in civil structures in China, such as Q235 [18].…”

Section: Analytical Model Of the Stress Ribbon Bridgementioning

confidence: 99%

Effect of Ground Motion Orientation on Seismic Responses of an Asymmetric Stress Ribbon Pedestrian Bridge

Zhang¹,

Zhang

et al. 2022

Advances in Civil Engineering

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The stress ribbon bridge uses ribbon in high tension to transfer loads and exhibits geometric nonlinearity under dynamic earthquake excitations. A typical double-span asymmetric stress ribbon pedestrian bridge was introduced as a prototype, and nonlinear time history analysis was performed to investigate the effect of ground motion orientation on the structural responses. Non-pulse-type and pulse-type ground motions were considered, and the influence of vertical ground motions was investigated. Numerical results showed that the stress ribbon bridge’s vertical and transverse displacements were sensitive to the excitation of the vertical ground motion. No single orientation led to the most critical values in all response indexes, and the critical orientation was approximately independent of the vertical ground motion. The negative bending moment of the ribbons, the pier top displacement, and the pier base moment at the transverse direction were sensitive to the ground motion orientation. Checking the responses resulting from different directions is necessary for a comprehensive estimation of the seismic performance of the stress ribbon bridge.

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Section: Analytical Model Of the Stress Ribbon Bridgementioning

confidence: 99%

Effect of Ground Motion Orientation on Seismic Responses of an Asymmetric Stress Ribbon Pedestrian Bridge

Zhang¹,

Zhang

et al. 2022

Advances in Civil Engineering

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“…The post-fire seismic capacity is one of the most important components in the post-fire reliability evaluation. The mechanical properties of structural steels under cyclic loading are quite different from those under monotonic loading, and the hysteretic properties of structural steels play a pivotal role in the seismic performance of structures [20,21]. According to the review of state-of-the-art literature, most of the included studies focused on the post-fire mechanical properties of structural steels under monotonic loading conditions, and the post-fire cyclic performance of structural steels was rarely discussed.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Performance of Structural Steels after Exposure to Various Heating–Cooling Treatments

Peng

Liu

2022

Metals

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The cyclic performance of structural steels after exposure to various elevated temperatures and cooling-down methods was experimentally investigated in this paper. Four types of frequently used structural steels were tested including Chinese mild steel Grade Q235, Chinese high-strength steel Grade Q345, and Chinese stainless steel Grade S304 and S316. A total of eighty specimens were prepared using three different heating–cooling processes before being subjected to cyclic loads. The post-fire basic features and hysteretic performances of the four types of structural steels exposed to various target temperatures (100–1000 °C), heat soak times (30 min or 180 min) and cooling-down methods (natural air or water) were recorded and discussed. The results show that all the tested structural steels prepared using different heating–cooling treatments exhibited proper ductility and energy dissipation capacity, while the heat soak times and cooling-down methods had a definite effect on their energy dissipation capacity; no Masing phenomenon was found in the tested structural steels. Finally, a set of skeleton curves were proposed for the four types of structural steels under cyclic loading based on the Ramberg–Osgood model, which could serve as the foundation for the seismic capacity evaluation of steel structures after a fire.

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“…Researchers worldwide have performed many studies on the constitutive models and mechanical properties of highstrength steels. Some scholars have studied the mechanical properties of high-strength steel materials and the constitutive models of tested steel under monotonic or cyclic loading [4][5][6]. Nie et al [7] studied the mechanical properties of steel on cold-formed steel (CFS) structures at high temperature and proposed constitutive relationship models based on the test data of S350, S420, and G500 steel, respectively.…”

Section: Introductionmentioning

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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Experimental cyclic behavior and constitutive modeling of high strength structural steels

Cited by 64 publications

References 34 publications

Effect of Ground Motion Orientation on Seismic Responses of an Asymmetric Stress Ribbon Pedestrian Bridge

Effect of Ground Motion Orientation on Seismic Responses of an Asymmetric Stress Ribbon Pedestrian Bridge

Cyclic Performance of Structural Steels after Exposure to Various Heating–Cooling Treatments

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

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