Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure
The weld form of intersecting joints in a steel tubular truss structure changes with the various intersecting curves. As the key role of joints in energy dissipation and seismic resistance, the weld is easy to damage, as a result the constitutive behavior of the weld is different from that of the ba...
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MDPI AG
2018-09-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/9/1701 |
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| author | Yaqi Suo Wenwei Yang Peng Chen |
| author_facet | Yaqi Suo Wenwei Yang Peng Chen |
| author_sort | Yaqi Suo |
| collection | DOAJ |
| description | The weld form of intersecting joints in a steel tubular truss structure changes with the various intersecting curves. As the key role of joints in energy dissipation and seismic resistance, the weld is easy to damage, as a result the constitutive behavior of the weld is different from that of the base metal. In order to define the cumulative damage characteristic and study the constitutive behavior of welded metal with the influence of damage accumulation, low-cycle fatigue tests were carried out to evaluate overall response characteristics and to quantify variation of cyclic stress amplitude, unloading stiffness and energy dissipation capacity. The results show that the cyclic softening behavior of welding materials is apparent, however, the steel shows hardening behavior with the increase of cyclic cycles, while the cyclic stress amplitude, unloading stiffness, and energy dissipation capacity of the welding materials degenerate gradually. Based on the Ramberg–Osgood model and introducing the damage variable D, a hysteretic model of welding material with the effect of damage accumulation was established, including an initial loading curve, cyclic stress-strain curve, and hysteretic curve model. Further, the evolution equation of D was also built. The parameters reflecting the damage degradation were fitted by the test data, and the simulation results of the model were proved to be in good agreement with the test results. |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-12T17:29:53Z |
| publishDate | 2018-09-01 |
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| spelling | doaj.art-fdcc3bb3669f45e1b7bda2ebb0472fdb2022-12-22T00:17:26ZengMDPI AGApplied Sciences2076-34172018-09-0189170110.3390/app8091701app8091701Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss StructureYaqi Suo0Wenwei Yang1Peng Chen2College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaCollege of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaInstitute of Architectural Engineering, Huangshan University, Huangshan 245021, ChinaThe weld form of intersecting joints in a steel tubular truss structure changes with the various intersecting curves. As the key role of joints in energy dissipation and seismic resistance, the weld is easy to damage, as a result the constitutive behavior of the weld is different from that of the base metal. In order to define the cumulative damage characteristic and study the constitutive behavior of welded metal with the influence of damage accumulation, low-cycle fatigue tests were carried out to evaluate overall response characteristics and to quantify variation of cyclic stress amplitude, unloading stiffness and energy dissipation capacity. The results show that the cyclic softening behavior of welding materials is apparent, however, the steel shows hardening behavior with the increase of cyclic cycles, while the cyclic stress amplitude, unloading stiffness, and energy dissipation capacity of the welding materials degenerate gradually. Based on the Ramberg–Osgood model and introducing the damage variable D, a hysteretic model of welding material with the effect of damage accumulation was established, including an initial loading curve, cyclic stress-strain curve, and hysteretic curve model. Further, the evolution equation of D was also built. The parameters reflecting the damage degradation were fitted by the test data, and the simulation results of the model were proved to be in good agreement with the test results.http://www.mdpi.com/2076-3417/8/9/1701damage accumulationunstiffened welded joints of steel tube trusswelding materiallow-fatigue testevolution equation of damage accumulationhysteretic modelparameter fitting |
| spellingShingle | Yaqi Suo Wenwei Yang Peng Chen Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure Applied Sciences damage accumulation unstiffened welded joints of steel tube truss welding material low-fatigue test evolution equation of damage accumulation hysteretic model parameter fitting |
| title | Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure |
| title_full | Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure |
| title_fullStr | Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure |
| title_full_unstemmed | Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure |
| title_short | Study on Hysteresis Model of Welding Material in Unstiffened Welded Joints of Steel Tubular Truss Structure |
| title_sort | study on hysteresis model of welding material in unstiffened welded joints of steel tubular truss structure |
| topic | damage accumulation unstiffened welded joints of steel tube truss welding material low-fatigue test evolution equation of damage accumulation hysteretic model parameter fitting |
| url | http://www.mdpi.com/2076-3417/8/9/1701 |
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