A dynamic stiffness matrix method for free vibrations of partial-interaction composite beams based on the Timoshenko beam theory. (3rd March 2022)

• Record Type: Journal Article
• Authors: Sun, Qikai; Zhang, Nan; Liu, Xiao
• Is Part Of: Journal of sound and vibration. Volume 520(2022)
• Publication Date: 2022-03-03
• Subjects: Partial-interaction composite beam -- Dynamic stiffness matrix method -- Free vibrations -- Interfacial interaction -- Shear deformation -- Rotary inertia; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2021.116579
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: This paper focuses on the development of a dynamic stiffness matrix method for analyzing the dynamic behavior of geometrically and materially linear two-layer partial-interaction composite beams based on the Timoshenko beam theory. The proposed model considers the effect of shear slip between concrete slab and steel beam as well as the shear deformations and rotary inertia. The main improvement offered by the proposed model compared to the existing methods is that each sub-beam is assumed to have an independent rotary angle, which is more realistic. The proposed model is compared to experimental and finite element results and other theoretical models, and the effects of shear deformations and rotary inertia on eigenfrequencies are discussed in detail.