MA Chi, LIU Shizhong, LI Aijun, JIN Xuejun. Shear Lag Effects of Continuous Corrugated Steel Web-Steel Bottom-Concrete Top Composite Box Girders[J]. Applied Mathematics and Mechanics, 2020, 41(5): 517-529. doi: 10.21656/1000-0887.400236
 Citation: MA Chi, LIU Shizhong, LI Aijun, JIN Xuejun. Shear Lag Effects of Continuous Corrugated Steel Web-Steel Bottom-Concrete Top Composite Box Girders[J]. Applied Mathematics and Mechanics, 2020, 41(5): 517-529.

# Shear Lag Effects of Continuous Corrugated Steel Web-Steel Bottom-Concrete Top Composite Box Girders

##### doi: 10.21656/1000-0887.400236
Funds:  The National Natural Science Foundation of China(51868040；51568036)
• Rev Recd Date: 2020-04-06
• Publish Date: 2020-05-01
• With different moduli of the concrete top and the steel bottom, the governing differential equations and boundary conditions for shear lag effects of corrugated steel web-steel bottom-concrete top (CSWSBCT) composite box girders were derived with the variational method. The formula for shear lag coefficients of the 2-span continuous CSWSBCT box girder under concentrated load and uniformly distributed load was established. The shear lag effects of the continuous composite box girder under 2 loading conditions were analyzed through model beam tests. The results show that, the theoretical values are in good agreement with the measured values of model tests and the finite element values on the top and bottom plates of the box girder, and the changing trend is consistent, which verifies the correctness of the calculation formula. The maximum shear lag coefficients of the top and bottom plates at the support section under uniform load are larger than those under the concentrated load. The shear lag effects at the junctions of the corrugated steel web, the concrete top and the steel bottom at the middle support section are prominent under 2 loading conditions.
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