Compressive Stress-strain Relationships of Laminated Bamboo under Service Temperature

Abstract Laminated bamboo is a novel green building material, understanding its mechanical properties at service temperatures is essential for structural safety and optimal design. However, currently there is no constitutive model capable of effectively predicting the compressive stress-strain relationship of laminated bamboo under the influence of service temperatures. This paper examines the influence of service temperature on the stress-strain relationship in laminated bamboo. Based on the fundamental form of the Weibull cumulative distribution, a constitutive model is proposed that can simulate the stress-strain relationship of laminated bamboo under varying temperature conditions, including strain hardening and thermal softening characteristics. Additionally, four constitutive models previously successfully applied to laminated bamboo or other bamboo composites were modified and analyzed for their capability to predict the compressive stress-strain relationship of bamboo-based materials under different temperature. The findings of this study not only guide the application of bamboo-based engineered materials in actual engineering structures, enhancing the precision and safety of structural designs, optimizing material usage, reducing waste, and lowering costs, but also provide valuable references for the research and application of other bamboo composite materials.