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| Deflection analysis of an improved composite box girder with corrugated steel webs |
| Received:December 22, 2023 Revised:March 13, 2024 |
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| DOI：10.7511/jslx20231222001 |
| KeyWord:composite box girder corrugated steel web element stiffness matrix deflection calculation parametric analysis |
| Author | Institution |
| 罗奎 |
南京航空航天大学 土木与机场工程系, 南京 ;湖南大学 土木工程学院, 长沙 |
| 冀伟 |
湖南大学 土木工程学院, 长沙 |
| 王秀艳 |
中国建筑第六工程局有限公司, 天津 ;天津大学 建筑工程学院, 天津 |
| 孔烜 |
湖南大学 土木工程学院, 长沙 |
| 韩振勇 |
中国建筑第六工程局有限公司, 天津 ;天津城建设计院有限公司, 天津 |
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| Abstract: |
| In order to accurately analyze the deflection of an improved composite box girder with a corrugated steel web(ICBGCSW),the deflection of the ICBGCSW is investigated using the finite beam segment method.First,the element stiffness matrix of ICBGCSW is derived using the principle of stationary potential energy by considering the shear deformation of the corrugated steel web(CSW)and the shear lag effect of the box girder.Furthermore,the deflection analysis program of ICBGCSW is developed based on the element stiffness matrix,and the accuracy and applicability of the proposed method is verified against the measured and finite element values of the deflection of the model test beam.Finally,the factors affecting the deflection of ICBGCSW are investigated.The results show that the deflection values obtained using the deflection analysis program are well matched with the measured and finite element values,and the error is within 2%.When the height-span ratio is less than 0.069,the thickness of the CSW and steel bottom plate has a greater effect on the deflection.When the height-span ratio is greater than 0.069,the effect of the thickness of CSW and steel bottom plate on deflection can be ignored.The deflection analysis program developed in this paper is simple to use,and the deflection values can be obtained by simply substituting the cross-section information and material properties of ICBGCSW into the program.The research results can provide a simplified analysis method for the deflection analysis of ICBGCSW. |
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