Experimental study on mechanical properties of laminated bamboo beam-to-column connections

Leng, Yubing; Xu, Qingfeng; Harries, Kent A.; Chen, Lingzhu; Liu, K.W.; Chen, Xi

doi:10.1016/j.engstruct.2020.110305

Cited by 42 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…experimentally proved that dowel‐type connections in timber truss structures can ensure high load‐carrying capacities and ductile behavior. Leng et al 16 . studied the moment‐rotation behavior of three types of different beam‐to‐column bolted connections in bamboo scrimber structures.…”

Section: Introductionmentioning

confidence: 99%

Bio‐based laminated truss structures with bolted steel connections: Experiment, modeling, and model‐updating

Shi,

Xu,

Demartino

et al. 2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Bio‐based laminated structures offer a timely solution to meet the pressing demand for resource‐efficient and environmentally responsible construction practices in civil engineering. Bolted connections are commonly used in truss joints and significantly impact their global mechanical behaviors. However, existing studies on the complex behavior of joints for integrated bio‐based structures are lacking. Based on previous work by the authors about joint behavior, this study seeks to experimentally investigate the axial behavior of bolted steel to laminated timber and bamboo (glubam) connections with slotted‐in steel plates in planar truss structures. First, cyclic tests were conducted on Bio‐based laminated planar truss structures to evaluate their global and local hysteretic behavior. The test matrix encompasses eight distinct connection configurations, carefully selected to assess the connection behavior of Laminated Veneer Lumber (LVL) and Glued Laminated Bamboo (glubam). Subsequently, through the incorporation of the hysteretic model for truss joints, an advanced hybrid truss model was developed within the OpenSees framework and successfully validated using experimental data. Finally, this study proposes and demonstrates the effectiveness of an efficient model‐updating framework, which combines the power of the genetic algorithm (GA) and neural network, resulting in a significantly enhanced accuracy of the model.

show abstract

Section: Introductionmentioning

confidence: 99%

Bio‐based laminated truss structures with bolted steel connections: Experiment, modeling, and model‐updating

Shi,

Xu,

Demartino

et al. 2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

show abstract

“…Usually, the processing of LBL involves 4-5-year-old bamboo culms, that are cut into long strips with dimensions of 2000 × 3 × 15 mm, dried till the moisture content gets 8-12%, then planned to remove the wax and silica on the outer skin and inner cavity layer to get a uniform size of the strips [75][76][77][78][79][80][81][82]. Then, bamboo strips undergo one of two processes for treatment: bleaching or caramelization [68,83,84].…”

Section: Introductionmentioning

confidence: 99%

“…The small LBL is produced from dried bamboo strips, assembling and gluing them into rectangular cross-sections [75], while large-scale LBL is made from lengthened bamboo strips with joints [91]. During the manufacturing process of LBL, defects of raw bamboo are removed or distributed randomly among the structural elements [34].…”

Section: Introductionmentioning

confidence: 99%

A Review of Basic Mechanical Behavior of Laminated Bamboo Lumber

Dauletbek¹,

Li²,

Lorenzo³

et al. 2022

Journal of Renewable Materials

View full text Add to dashboard Cite

Over the past decade, the physical and mechanical performances of laminated bamboo lumber (LBL)-a bamboobased structural material, have been extensively studied using experimental, analytical, and numerical approaches. This paper presents a review of existing knowledge in the literature about the mechanical properties of LBL. The paper involved the review of the response of LBL to different types of loading such as tension, bending, compression, and shear. Based on results of the literature reviewed, the strength of LBL parallel to grain was 90-124 MPa with MOE of 10700 MPa in tension, 29. 55-72.60 MPa, and MOE of 8396-11022 MPa in compression, 63.87-128.4 MPa, and MOE of 8320-10912 MPa in bending, and 7.15-17.5 MPa in shear. The average strength of LBL was similar and in some cases exceeded the average values of bamboo-or wood-based materials, while the variability of its mechanical parameters was lower. The variability in strength values of LBL was affected by bamboo species, density and thickness of bamboo strips, growth portion, type of treatment, strips arrangements, and type of adhesive which in turn calls for classification of LBL by strength grades, degree of hardness, the capability of impregnation and penetration, as well as by areas of application in construction. The study provided and discussed concluding observations, the current research gap, and future research directions on the mechanical properties of LBL.

show abstract

“…Connections, like a fuse in an electrical circuit, are frequently the source of ductility and energy dissipation in the structure in case of overloading because of the brittle failure behavior of wood when stressed in tension or shear [ 7 ]. The connections between structural parts must reinforce the structures to withstand gravity or vertical loads induced by self-weight, live loads, wind, and seismic loads, and then transmit these forces to the foundation [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Withdrawal Performance of Nails and Screws in Cross-Laminated Timber (CLT) Made of Poplar (Populus alba) and Fir (Abies alba)

et al. 2022

View full text Add to dashboard Cite

Cross-laminated timber (CLT) can be used as an element in various parts of timber structures, such as bridges. Fast-growing hardwood species, like poplar, are useful in regions where there is a lack of wood resources. In this study, the withdrawal resistance of nine types of conventional fasteners (stainless-steel nails, concrete nails and screws, drywall screws, three types of partially and fully threaded wood screws, and two types of lag screws), with three loading directions (parallel to the grain, perpendicular to the surface, and tangential), and two layer arrangements (0-90-0° and 0-45-0°) in 3-ply CLTs made of poplar as a fast-growing species and fir as a common species in manufacturing of CLT was investigated. Lag screws (10 mm) displayed the highest withdrawal resistance (145.77 N), whereas steel nails had the lowest (13.13 N), according to the main effect analysis. Furthermore, fasteners loaded perpendicular to the grain (perpendicular to the surface and tangential) had higher withdrawal resistance than those loaded parallel to the grain (edge). In terms of the layer arrangement, fasteners in CLTs manufactured from poplar wood (0-45-0°) had the greatest withdrawal resistance, followed by CLTs manufactured from poplar wood in the (0-90-0°) arrangement, and finally, those made from fir wood in the (0-90-0°) arrangement. The fastener type had the most significant impact on the withdrawal resistance, so changing the fastener type from nails to screws increased it by about 5–11 times, which is consistent with other studies. The results showed that poplar, a fast-growth species, is a proper wood for manufacturing CLTs in terms of fastener withdrawal performance.

show abstract

Experimental study on mechanical properties of laminated bamboo beam-to-column connections

Cited by 42 publications

References 14 publications

Bio‐based laminated truss structures with bolted steel connections: Experiment, modeling, and model‐updating

Bio‐based laminated truss structures with bolted steel connections: Experiment, modeling, and model‐updating

A Review of Basic Mechanical Behavior of Laminated Bamboo Lumber

Withdrawal Performance of Nails and Screws in Cross-Laminated Timber (CLT) Made of Poplar (Populus alba) and Fir (Abies alba)

Contact Info

Product

Resources

About