Numerical Simulation of the Shear Capacity of a GFRP-Strengthened Natural Bamboo-Bolt Composite Joint

Abstract

As an ecological green building material, natural bamboo has many advantages such as a light weight, high strength, and short growth cycle. Natural bamboo is widely used in landscape architecture and fabricated structures. However, in bamboo building structures, the most common bolted joints often appear cleaved along the grain. In this paper, glass fiber-reinforced polymer (GFRP) is designed to wrap and improve the shear capacity of natural bamboo-bolt composite joints. According to the corresponding material parameters, the finite element model of composite joints is established, and the key influencing variables of the bearing capacity, namely the bolt diameter, bamboo tube outer diameter, and screw end distance, are analyzed. In addition, according to the European analytical yield model of bolted connections, the analytical calculation method of the bearing capacity is proposed and compared with the experimental and simulated values. The results showed that the numerical model and the modified analytical model can suitably describe the bearing capacity of composite joints, and a higher bolt diameter, along with the bamboo outer diameter, will lead to a higher ultimate load of the composite joints. Moreover, the bearing capacity of composite joints has no obvious relationship with the end spacing.

Advances in Connection Techniques for Raw Bamboo Structures – A Systematic Review

“…One addition made by the authors is the introduction of hybrid connections. The recently proposed raw bamboo connections combine elements from traditional and modern connections [51], or integrate multiple modern connections [17,20,23,44,[74][75][76], or blend modern connections with supplementary connection components [26,[40][41][42]44,49,[62][63][64][65]68]. Hence, they are termed hybrid connections.…”

“…Li et al [74] also employed GFRP to wrap bolted bamboo connections, aiming to boost shear capacity and prevent brittle splitting failure. Their approach was validated through numerical simulations using finite element models.…”

“…As mentioned in section 3.2.2.3., FRP sheets are employed together with bolted bamboo connections as shown in Figure 17 to boost shear capacity and prevent brittle splitting failure [23,74,75]. This connection is a combination of two modern connections to leverage the strength of both connection types.…”

Advances in Connection Techniques for Raw Bamboo Structures—A Review

“…One addition made by the authors is the introduction of hybrid connections. The recently proposed raw bamboo connections combine elements from traditional and modern connections [57], integrate multiple modern connections [20,23,26,50,[80][81][82], or blend modern connections with supplementary connection components [29,[46][47][48]50,55,[68][69][70][71]74]. Hence, they are termed hybrid connections.…”

“…Li et al [80] also employed GFRP to wrap bolted bamboo connections, aiming to boost the shear capacity and prevent brittle splitting failure. Their approach was validated through numerical simulations using finite element models.…”