A unified approach to evaluate the behavior of composite structural elements is proposed considering the interaction between the shear and normal stresses due to the connecting system. The model assumes linear behavior for the materials and connection and allows one to analyze different structural problems in the serviceability conditions. Numerical examples show that many classical coupled problems could be analyzed by a unified approach; in particular, the coupled shear walls subject to horizontal loads, steel-concrete composite beams with stud connectors, and reinforced beams strengthened with external plates are considered.
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