Numerical modeling and parametric analysis of grouted connections under axial loading. (September 2020)

• Record Type: Journal Article
• Authors: Chen, Tao; Cao, Chengcheng; Zhang, Chihai; Wang, Xian; Chen, Ke; Yuan, Guokai
• Is Part Of: Thin-walled structures. Volume 154(2020)
• Publication Date: 2020-09
• Subjects: GCs -- Axial mechanical properties -- Radial stiffness -- Height to space ratio -- Length to diameter ratio; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2020.106880
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: With the rapid development of the offshore wind power industry, large-diameter grouted connections (GCs) with high-strength grout have become a developing trend. Previous studies on ordinary-strength and small-scale GCs may not meet current engineering needs. A numerical study was carried out to investigate how the axial mechanical properties of a large-diameter GC that has high-strength grout are influenced by geometric parameters, such as radial stiffness, the height to space ratio ( h / s ) of shear keys, and the length to diameter ratio ( L g / D p ). The finite element model was verified against the results of the experimental test. The mechanical properties of ultimate bearing capacity, interface transfer strength, ductility, nominal average stress and grout contact pressure distribution are discussed in detail. The results suggest that the increase in radial stiffness can strengthen the axial ultimate bearing capacity and ductility of the GC. Besides, the h / s of the shear keys can affect the ultimate bearing capacity and ductility of GC by influencing the number of diagonal compression struts. Although the L g / D p can significantly improve the axial ultimate bearing capacity of GCs, conversely, the interface transfer strength is continuously reduced. The research results can provide technical reference for the design of GCs in the offshore wind turbine industry. Highlights: Advanced FEM were developed to simulate grouted connections. Finite element numerical model was verified against the experimental tests. Geometrical parameters of GCs were investigated. Mechanical properties of different geometric parameters were discussed.