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Structural Engineering and Mechanics Volume 96, Number 2, October25 2025 , pages 101-115 DOI: https://doi.org/10.12989/sem.2025.96.2.101 |
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Method for flexural bearing capacity of steel-concrete composite beam based on equivalent coefficient of compressive area of concrete slab |
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Hu Ding, Faxing Ding, Chang He, Liping Wang and Fei Lyu
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| Abstract | ||
| The sliding between the concrete slab and steel beam reduces the flexural bearing capacity of the steel-concrete composite beam. To obtain the flexural bearing capacity of the composite beam, the method based on the equivalent coefficient of compressive area (ECCA) of the concrete slab was proposed in this paper. Finite element models of the composite beams were established to investigate the effects of different parameters on the ECCA of the concrete slab and yield area ratio of the steel beam. The results indicated that the ECCA of the concrete slab, in the partial shear connected composite beam, is mainly affcted by the degree of shear connection and the sliding between the concrete slab and steel beam. The ECCA increases with the increasing of the degree of shear connection, and the ECCA was fitted. In the full and partial shear-connected composite beam, the steel beam is in a full section yield status under ultimate bending load. Comparing the formulas proposed in this paper with those in other literature, this method has a high accuracy and simple form in predicting the flexural bearing capacity of the full and partial shear connected steel-concrete composite beam. | ||
| Key Words | ||
| degree of shear connection; equivalent coefficient of compressive area; flexural bearing capacity; steelconcrete composite beam; yield area ratio | ||
| Address | ||
| Hu Ding: School of Civil Engineering, Central South University, 22 South Shaoshan Rd., Changsha, Hunan Provinve, China; Hunan No.6 Engineering Co., Ltd., 788 West Laodong Rd., Changsha, Hunan Province, China Faxing Ding: School of Civil Engineering, Central South University, 22 South Shaoshan Rd., Changsha, Hunan Provinve, China; Engineering Technology Research Center for Prefabricated Construction Industrialization of Hunan Province, 22 South Shaoshan Rd., Changsha, Hunan Provinve, China Chang He: School of Civil Engineering, Central South University, 22 South Shaoshan Rd., Changsha, Hunan Provinve, China Liping Wang: School of Civil Engineering, Central South University, 22 South Shaoshan Rd., Changsha, Hunan Provinve, China Fei Lyu: School of Civil Engineering, Central South University, 22 South Shaoshan Rd., Changsha, Hunan Provinve, China | ||