Novel two-node linear composite beam element with both interface slip and shear deformation into consideration: Formulation and validation

• This paper proposes a linear composite beam element with slip and shear deformation into consideration.
• The element stiffness matrix is derived by the total potential energy method.
• Both simply supported- and continuous-composite beams are used to validate the proposed element.
• A comparison is made between the proposed element and other models.
• The proposed element is applicable to slender composite beams or deep ones.

This paper develops a novel two-node linear composite beam element for the steel–concrete composite beam with elastic shear connection. The element stiffness matrix takes into account the effects of interface slip and shear deformation. Both simply supported- and continuous composite beams are used to validate the proposed element, and a comparison is made between the proposed element and other methods. The impact of cross sectional shear deformation on deflection is also discussed. The results show that the novel element is capable of effectively and accurately calculating the deflection and slip, and is applicable to slender composite beams or deep ones.