Abstract
Inspired by the studies about wooden beam applied with prestressed steel plate and bamboo beam strengthened by fiber-reinforced polymer (FRP), this paper aims to explore the applicability of the prestressed basalt fiber-reinforced polymer (BFRP) sheet to the laminated bamboo beam and the variation of the flexural performance of the laminated bamboo beam applied with prestressed BFRP sheet. Two series of tests were conducted in the present study. In the first series of tests, the prestress loss of the prestressed BFRP sheet was classified and analyzed based on measured strains and deflections, which led to a derivation of the effective prestressed force considering the prestress loss. Analyses showed that the recommended value of prestress loss compared with the initial prestressed force was 22.0% based on the existing test data in the specimen preparation stage. In the second series of tests, the static loading test was performed to investigate the flexural performance of the laminated bamboo beam applied with prestressed BFRP sheet and analyze the difference between the laminated bamboo beams applied with prestressed and non-prestressed BFRP sheets. Test results showed that the no significant variation of the ultimate load and a reduction of the ultimate deformation capacity were caused by the application of the prestressed BFRP sheet.
Highlights
As a traditional structural material [1], the bamboo is convenient to be locally obtained and has usually been utilized in building local houses in China, which has advantages such as saving costs, environmental friendliness, and recyclability [2,3,4]
Inspired by the above studies, this paper explores the application of the prestressed basalt fiber-reinforced polymer (BFRP) sheet in the laminated bamboo beam
When the specimen reached the ultimate load, the BFRP sheet and the bottom fibers of the laminated bamboo beam simultaneously fractured with an abrupt noise
Summary
As a traditional structural material [1], the bamboo is convenient to be locally obtained and has usually been utilized in building local houses in China, which has advantages such as saving costs, environmental friendliness, and recyclability [2,3,4]. The Advances in Civil Engineering elastic modulus of the basalt fiber-reinforced polymer (BFRP) is relatively small [24], which may have a better cooperative working performance with bamboo engineering material [25]. A recent study conducted by Wei et al showed that the application of the fiber-reinforced polymer (FRP) can be effective in improving the flexural performance of bamboo beams [26]. Inspired by the above studies, this paper explores the application of the prestressed BFRP sheet in the laminated bamboo beam. In order to obtain the reliable performance of the laminated bamboo beam applied with the prestressed BFRP sheet, the prestress loss is firstly investigated. The flexural performance of the laminated bamboo beam applied with the prestressed BFRP sheet is studied, which is valuable for the formation of the design of such structure
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