Experimental and analytical study of the mechanical behavior of heterogeneous glulam–concrete beams and panels assembled by a specific treatment of wood. (10th December 2018)

• Record Type: Journal Article
• Authors: Augeard, E.; Michel, L.; Ferrier, E.
• Is Part Of: Construction & building materials. Volume 191(2018)
• Page Start: 812
• Page End: 825
• Publication Date: 2018-12-10
• Subjects: Beam -- Floor -- Wood -- Concrete -- Gluing -- Carbon fiber-reinforced polymer -- New surface treatment; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.10.038
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: UHPC and fiber reinforced polymer bonded to timber interface. Large scale beams and panels. FLexural behaviour. Modeling. High performance structures. Abstract: In wood construction, some attention has to be made in strength and stiffness of the structure. The deflection of wooden elements is often a weakness and an issue for designers. Several solutions have immerged to ameliorate the mechanical behavior of timber structure like the strengthening by adding specific materials such as ultra-high performance fiber-reinforced concrete (UHPFRC). The mechanical performance of wood structures is improved by composite structures. The cross-section of timber can also be internally reinforced by rebars of carbon fiber-reinforced polymer (CFRP) or steel. The combination of concrete, wood and rebars are an interesting solution to improve and strengthen timber structures but the connection system have to be performant otherwise the composite structure does not be fully optimal. This paper presents the short-term performances of glulam-concrete-rebar composite beams with different bonding processes and in particular a new specific treatment of wood. An analytical model based on a nonlinear and iterative procedure is developed to predict the failure of the composite structure by including the characteristics of the each material. According the results, composite beams improve the structural response by increasing both the strength and stiffness of the structure. Hybrid structure can be a good alternative to the conventional wooden structure. Finally, the reliability of large-scale panels is evaluated by performing bending tests.