An out-of-plane bending hysteretic model for multi-planar CHS X-connections
| Autor: | Yangzheng Cai, Bida Zhao, Chao Sun, Chengqing Liu |
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| Rok vydání: | 2020 |
| Předmět: |
Chord (geometry)
Materials science business.industry 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Finite element method Brace 0201 civil engineering Exponential function Planar 021105 building & construction Architecture Bending moment Cylinder stress Restoring force Safety Risk Reliability and Quality business Civil and Structural Engineering |
| Zdroj: | Structures. 23:335-350 |
| ISSN: | 2352-0124 |
| DOI: | 10.1016/j.istruc.2019.10.003 |
| Popis: | The multi-planar circular hollow section (CHS) X-connection is one of common configurations in single layered lattice steel tubular structures. A hysteretic model, including the skeleton model and restoring force model is proposed to simulate the hysteretic performance of X-connections under cyclic out-of-plane bending moments (OPB) generated by vertical seismic action. Exponential function is adopted in the skeleton model and the Ramberg-Osgood function is adopted in the restoring force model. The parameters in the hysteretic model are determined by finite element (FE) analysis and nonlinear regression. Additionally, an improved out-of-plane bending hysteretic model considering the influence of brace axial stress and chord normal stress is developed to simulate the seismic performance of X-connections in engineering practice. The proposed hysteric model is verified by experimental and FE results and the improved hysteretic model can consider the effect of strength degradation. |
| Databáze: | OpenAIRE |
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