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| Study on the load transverse distribution coefficient of multi-beam composite I-beam with corrugated steel webs |
| Received:September 05, 2022 Revised:February 07, 2023 |
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| DOI：10.7511/jslx20220905001 |
| KeyWord:steel-concrete composite beam I-beam with corrugated steel webs load transverse distribution [JP]coefficient shear deformation slip effect diaphragm |
| Author | Institution |
| 吴传山 |
山东高速济青中线公路有限公司, 潍坊 |
| 邓文琴 |
南京工业大学 土木工程学院, 南京 |
| 张焕涛 |
山东高速济青中线公路有限公司, 潍坊 |
| 查上 |
南京工业大学 土木工程学院, 南京 |
| 张建东 |
南京工业大学 土木工程学院, 南京 ;苏交科集团股份有限公司, 南京 |
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| Abstract: |
| In order to explore the calculation method of the load transverse losd distribution coefficient of a multi-beam composite I-beam with corrugated steel web,the traditional eccentric pressure method,modified eccentric pressure method and rigid-connected beam method are modified by considering the torsional stiffness,shear deformation and steel-mixed slip effect of the corrugated steel webs.Combined with the finite element model,the applicability of the above methods are compared and analyzed through a typical composite four-beam bridge with corrugated steel webs.Then,the influence of the number and stiffness of the diaphragm on its transverse load distribution coefficient is studied based on the parametric analysis.The results show that the transverse load distribution coefficient obtained by the rigid-connected beam method considering shear deformation and slip effect is in the best agreement with the finite element value.When the width-span ratio of the bridge is less than 2,the rigid-connected beam method should be used to calculate the transverse load distribution coefficient of each main beam,when the width-span ratio is greater than 2,the more concise modified eccentric pressure method should be used for calculation.The installation of diaphragms can improve the transverse load uniform distribution of each main beam,but the spacing and stiffness of the diaphragms between spans have little effect on the transverse load distribution coefficient.In the design of a real bridge,the diaphragms can be arranged at the end and mid-span positions,and the rigidity of the diaphragms and the number of diaphragms in the remaining parts can be arranged according to the requirements of structural stability. |
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