Experimental investigation on the flexural and shear behaviour of LVL I-beam strengthened with steel channels

Wang, Xuan; Zhang, Jialiang; Wu, Pei; Li, Yushun

doi:10.1016/j.conbuildmat.2022.127719

Cited by 15 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LVL elements are obtained from trees of relatively small diameters using the rotary peeling method thanks to which wood resources are used efficiently. The size of the LVL panels is not limited by the original wood size [6]. LVL is produced in different shapes, which can be adapted to its applications [7].…”

Section: Introduction 1lvl As a Sustainable Materialsmentioning

confidence: 99%

Free Vibrations of Sustainable Laminated Veneer Lumber Slabs

Abramowicz,

Chybiński,

Polus

et al. 2023

Sustainability

View full text Add to dashboard Cite

In this paper, the results of dynamic laboratory tests of four laminated veneer lumber (LVL) slabs of different thicknesses, widths, and types were presented. In three of the tested slabs, LVL with all veneers glued lengthwise was used (LVL R). In one LVL slab, a fifth of the veneers were glued crosswise (LVL X). Laminated veneer lumber slabs are engineering wood products with several important performance characteristics, making them a sustainable and preferred solution in civil engineering. To ensure the safe operation of a building with LVL structural elements, it is important to know their dynamic properties. The basic dynamic characteristics of the slabs obtained from experimental tests made it possible to validate the numerical models of the slabs. The slab models were developed in the Abaqus program using the finite element method. The elastic and shear moduli of laminated veneer lumber used in the four slabs were identified through an optimization process in which the error between the analyzed frequencies from the laboratory tests and the numerical analyses was minimized. In the case of slabs that possess the same thickness and are composed of different LVL types, the elastic modulus of LVL R in the longitudinal direction was 1.16 times higher than the elastic modulus of LVL X in the same direction. However, the elastic moduli of LVL R in tangential and radial directions were lower than the elastic moduli of LVL X in the same directions. The above was the result of the fact that the 45 mm LVL X slab had 3 out of 15 veneers glued crosswise. In the case of slabs possessing different thicknesses but the same width and type, the elastic modulus of the thicker panel was 1.13 times higher than that of the thinner panel. After validating the models, the numerical analyses yielded results consistent with the experimental results. The numerical models of the LVL slabs will be used to develop numerical models of composite floors with LVL panels in future research. Such models will allow for the analysis of floor dynamic characteristics and user-generated vibrations, which is required when verifying the serviceability limit state.

show abstract

Section: Introduction 1lvl As a Sustainable Materialsmentioning

confidence: 99%

Free Vibrations of Sustainable Laminated Veneer Lumber Slabs

Abramowicz,

Chybiński,

Polus

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…Wu et al [10] carried out the shear performance test on steel-wood composite beams, and established the calculation formula of shear capacity of composite beams according to the bending shear flow theory. Wang et al [11] performed four-point bending on a new type of I-LVL beam strengthened by cold-formed thin-walled channel steel, and found that considering the slip effect when calculating the flexural capacity was closer to the actual deformation than the section method.…”

Section: Introductionmentioning

confidence: 99%

Research on the Shear Performance of Cold-Formed Thin-Walled Steel-Glued Laminated Wood Composite Beams

Yang,

Guo,

Wang

et al. 2023

Buildings

View full text Add to dashboard Cite

This paper proposes a new type of composite box beam combined with cold-formed thin-walled steel and glued laminated timber to develop green building structures while improving the load-carrying capacity of a single steel girder and glued timber girder. Two composite beams composed of laminated timber and Q235 cold-formed thin-walled steel were designed and fabricated. Then, the shear performance test with quadratic loading was carried out to analyze the load carrying capacity, damage modes, and deformation characteristics of the test beams, as well as their influencing factors. Subsequently, a finite element model of the composite beam was established, and the loading mode was the same as that of the test to further study the parameters affecting the shear performance of the composite beam. The results of the study indicate that steel and glued timber in composite beams connected by adhesive bonding can work and deform together under load and each give full play to its material properties, especially the composite beams, which exhibit higher shear strength than a steel or timber beam. The effects of parameters such as steel cross-sectional area, shear span ratio, steel skeleton form, and steel cross-sectional strength on the shear capacity of the composite beams were observed, among which the shear span ratio had the greatest effect on the shear capacity of the composite beams. The shear capacity decreased by 14.3% and 19.5% when the shear span ratio was increased from 1.5 to 2.0 and 2.5, respectively. The shear capacity of the combined composite beams increased by 10.6%, 6.3%, and 5.8% when the thickness was increased from 1.5 mm to 2.0 mm, 2.5 mm, and 3.0 mm, respectively. When the combination of the steel cross-section was a box beam, the overall shear-bearing capacity could be increased by 12% compared with the “I” type composite beam, although its shear stiffness was close to that of the “I” section composite beam.

show abstract

“…Timber is produced in a wide range of shapes [6]. Furthermore, new engineered products made of wood such as laminated veneer lumber (LVL) [7], glued-laminated timber (glulam) [8] and cross-laminated timber (CLT) [9][10][11] have made it possible to overcome the size limitations of sawn timber. The use of engineered wood products also reduces the impact of naturally Lam, Dai, Saveri, Rehman, and Ashour [36][37][38][39][40] modified headed studs to develop demountable shear connectors.…”

Section: Introductionmentioning

confidence: 99%

Structural Behaviour of Aluminium–Timber Composite Beams with Partial Shear Connections

Chybiński

Polus

2023

Applied Sciences

View full text Add to dashboard Cite

In this paper, the short-term behaviour of innovative aluminium–timber composite beams was investigated. Laminated veneer lumber panels were attached to aluminium beams with screws. Recently conducted theoretical, experimental, and numerical investigations have focused on aluminium–timber composite beams with almost full shear connections. However, no experiments on aluminium–timber composite beams with partial shear connections have yet been conducted. For this reason, composite action in composite beams with different screw spacing was studied in this paper. Four-point bending tests were performed on aluminium–timber composite beams with different screw spacing to study their structural behaviour (ultimate load, mode of failure, load versus deflection response, load versus slip response, and short-term stiffness). The method used for steel–concrete composite beams with partial shear connection was adopted to estimate the load bearing capacity of the investigated aluminium–timber composite beams. The resistance to sagging bending of the aluminium–timber composite beams with partial shear connections from the theoretical analyses differed by 6–16% from the resistance in the laboratory tests. In addition, four 2D numerical models of the composite beams were developed. One model reflected the behaviour of the composite beam with full shear connection. The remaining models represented the composite beams with partial shear connections and were verified against the laboratory test results. Laminated veneer lumber was modelled as an orthotropic material and its failure was captured using the Hashin damage model. The resistance to sagging bending of the aluminium–timber composite beams with partial shear connections from the numerical analyses were only 3–6% lower than the one from the experiments.

show abstract

Experimental investigation on the flexural and shear behaviour of LVL I-beam strengthened with steel channels

Cited by 15 publications

References 33 publications

Free Vibrations of Sustainable Laminated Veneer Lumber Slabs

Free Vibrations of Sustainable Laminated Veneer Lumber Slabs

Research on the Shear Performance of Cold-Formed Thin-Walled Steel-Glued Laminated Wood Composite Beams

Structural Behaviour of Aluminium–Timber Composite Beams with Partial Shear Connections

Contact Info

Product

Resources

About