Bamboo has been widely used as a load-bearing material in construction; however, there are limited studies on the stability of slender original bamboo columns. Based on the experimental investigation of thirty-nine original bamboo columns, parametric analyses were conducted to investigate the influence of the diameter–thickness ratio, cross-sectional area and slenderness ratio on the axial compression behavior of original bamboo columns. The test results indicate that the failure modes of the columns are substantially affected by the slenderness ratio and diameter–thickness ratio. For columns with the same diameter–thickness ratio, the ultimate bearing capacity was negatively correlated with the slenderness ratio, and the highest reduction rate for the load-bearing capacity caused by the slenderness ratio was 44.39%. Under the same slenderness ratio, when the diameter–thickness ratio increased by 18.75%, the ultimate bearing capacity increased by 82.65%. An excessive slenderness ratio may result in local buckling, leading to underutilization of the material strength when failure occurs and substantially reducing the load capacity of bamboo columns. Local buckling can be mitigated by decreasing the slenderness ratio and increasing the diameter–thickness ratio. According to the test results, the model predicting the compressive bearing capacity of the original bamboo column was proposed considering the slenderness ratio and diameter–thickness ratio, and it was indicated that the proposed model can provide satisfactory predictive results.

This paper presents a seismic response evaluation of self-centering prestressed concrete frames with infill walls (SCPC-IW frames). Three types of infill walls with different load capacity were selected to be installed in a bare self-centering prestressed concrete frame (SCPC-Bare frame). Beam web friction devices are included in the beam-column connections to provide energy dissipation capacity. Numerical models of the SCPC frame, and the three SCPC-IW frames were established and analyzed in a finite element software, OpenSees. Firstly, the nonlinear static analyses and nonlinear dynamic analyses under 44 ground motions were performed. Secondly, the incremental dynamic analyses (IDAs), seismic fragility analyses, and collapse resistance capacity evaluation were conducted. The results showed that the initial stiffness, energy dissipating capacity of SCPC-IW frames are increased in comparison to SCPC frames. After adding infill walls, the lateral displacement of the SCPC-IW frames decreases. However, the residual deformation and axial compression ratio of the SCPC-IW frame increases. As the infill walls strength increases, the increased amplitude of residual displacement becomes much larger than the decreased amplitude of the drift. It is concluded that when the load capacity of infill walls ranges from 37% to 79% of the web friction force, the SCPC-IW frames can achieve a good balance in terms of stiffness, energy dissipation, and self-centering capability as well as collapse resistance capability.