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| High-order elastic shear buckling analysis of unstiffened steel plate shear wall |
| Received:August 09, 2019 Revised:October 31, 2019 |
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| DOI：10.7511/jslx20190809001 |
| KeyWord:steel plate shear wall high-order buckling finite element analysis height-to-span ratio height-to-thickness ratio |
| Author | Institution |
| 胡月华 |
苏州科技大学 土木工程学院, 苏州 |
| 孙国华 |
苏州科技大学 土木工程学院, 苏州 |
| 刘文渊 |
南京理工大学 泰州科技学院, 泰州 |
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| Abstract: |
| The unstiffened steel shear wall(SPSW)structure was prone to buckling and development of the principle tension and compression field.The lateral strength and lateral stiffness of unstiffened SPSW were provided by inclined tension field.The traditional strip model was presented to simulate the seismic behavior of an unstiffened SPSW structure and the contribution of compression field was ignored.However,for unstiffened SPSWs with small or moderate height-to-thickness ratio the lateral bearing capacity was underestimated.Especially,the multi-wave out-of-plane deformation of unstiffened SPSW subjected to cyclic loading was similar to the high-order buckling mode.Therefore,to improve the accuracy of the simplified analytical macro model,the high-order buckling load could be introduced to consider the effect of compression field of an unstiffened SPSW structure.In this paper,a total of 66 single-story,single-span unstiffened SPSW structures with pinned connections were designed,considering the effect of height-to-thickness ratio,height-to-span ratio,as well as frame-to-wall stiffness ratio and the buckling analysis was performed.The analytical results show that the height-to-thickness ratio and frame-to-wall stiffness ratio have less influence on the shear buckling coefficient of an unstiffened SPSW structure.With the increase of height-to-span ratio the shear buckling coefficient shows an increasing tendency.The MATLAB program was adopted for regression analysis on the high-order shear buckling coefficients of unstiffened SPSW structures,and the calculating formulas were proposed. |
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