An ultimate-state-based-model for inelastic analysis of intermediate slenderness PSB columns under eccentrically compressive load. (30th September 2015)

• Record Type: Journal Article
• Authors: Huang, Dongsheng; Bian, Yuling; Huang, Dongmei; Zhou, Aiping; Sheng, Baolu
• Is Part Of: Construction & building materials. Volume 94(2015)
• Page Start: 306
• Page End: 314
• Publication Date: 2015-09-30
• Subjects: Parallel strand bamboo -- Buckling of column -- Inelastic analysis -- Bamboo composite -- Intermediate slenderness column; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2015.06.059
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Failure of intermediate slenderness PSB columns is dominated by material damage. Loading-carry capacity of slenderness PSB column is lower than buckling threshold. New model to predict ultimate loading-carry capacity of PSB columns was developed. New method to calculate inelastic deformation of PSB columns was proposed. Abstract: Parallel Strand Bamboo (PSB) is a high quality bamboo based composite and has been used as a construction and building material in recent years. The responses of intermediate slenderness PSB columns, whose slenderness ratios are between that of stocky and slenderness columns, subjected to eccentrically compressive load are shown significant nonlinearities. These nonlinearities should be considered when evaluating the loading-carry capacities and deflections of them in the ultimate state. Experiments revealed that the failure of intermediate PSB columns subjected to eccentrically compressive load are dominated by material damage due to the combined actions of compression and bending of P-delta effect. The failure mode in the ultimate state of the columns is such that the fibers at the damage section are crushed in concave side and snapped in convex side. Based on this failure mode, an ultimate-state-based model, which takes the nonlinearities of material and P-delta effect into consideration, was developed in this paper for inelastic analysis of intermediate slenderness PSB columns under eccentrically compressive load. Good agreements can be observed between the results of experiments and that of calculation by using the ultimate-state-based model.