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| Shear lag effect theory and parameter analysis of composite box girder with corrugated steel webs considering the influence of haunch |
| Received:November 05, 2021 Revised:December 23, 2021 |
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| DOI：10.7511/jslx20211105001 |
| KeyWord:corrugated steel web shear lag effect variational method axillary stem parameter analysis |
| Author | Institution |
| 鲁宁宁 |
兰州交通大学 土木工程学院, 兰州 |
| 刘世忠 |
兰州交通大学 土木工程学院, 兰州 |
| 毛亚娜 |
兰州交通大学 土木工程学院, 兰州 |
| 王力 |
兰州交通大学 土木工程学院, 兰州 |
| 余剑搏 |
兰州交通大学 土木工程学院, 兰州 ;四川公路桥梁建设集团有限公司勘察设计分公司, 成都 |
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| Abstract: |
| Considering the influence of the haunch on the shear lag effect of the corrugated steel web composite box girder,the correction coefficient is defined through the shear flow formula,the corresponding differential equation is obtained by the variational method,and then the calculation formula of the shear lag coefficient of the simply supported corrugated steel web composite box girder under a concentrated load is obtained,which is verified by numerical simulation.Finally,by adjusting the size parameters of the stem axil,the influence of the change of the stem axil shape on the shear lag effect is studied.The results show that the theoretical calculation results considering the influence of stem axillary are in good agreement with the finite element results.The shear lag effect of the corrugated steel web composite box girder decreases with the increase of haunch influence coefficient.The shear lag coefficient of the corrugated steel web composite box girder considering the influence of haunch is significantly lower than that without consideration,and the shear lag effect coefficient is reduced by about 10% under a concentrated load;When the ratio of the haunch width to the upper flange width is greater than 0.5,the influence on the shear lag changes little,and the influence on the shear lag is the largest when the haunch height is 0.16~0.19 times of its width. |
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