Performance‐Based Plastic Design of Buckling‐Restrained Braced Laminated Bamboo Frame Structures and Seismic Vulnerability Analysis Using Latin Hypercube Sampling

ABSTRACT This study advances the performance‐based plastic design (PBPD) method for the application of buckling‐restrained braces (BRB) in laminated bamboo frame (LBF) structures. A vulnerability analysis discusses the key parameters involved in the design method and their impact on the reinforcement effectiveness. Multistripe analysis was employed to generate vulnerability curves for both structures across various limit states, while Latin hypercube sampling (LHS) was utilized to sample modeling parameters. The addition of BRB supports markedly increases the lateral stiffness of LBF structures, thereby improving their seismic performance. The analysis reveals that the effectiveness of BRB diminishes from approximately 50% to around 20% as the ultimate drift ratio ( θ u ) increases. In the PBPD method, the important design parameter—story shear ratio ( p )—is also affected by θ u . As θ u rises, the p ‐value that achieves maximum median intensity in the vulnerability function increases. Furthermore, the inclusion of BRB reduces the overall modeling uncertainty of the structure, indicating that modeling uncertainty significantly influences the vulnerability curves of LBF structures. Under the excitation of near‐field earthquakes, the annual collapse probability of the BRBLBF structure was found to comply with existing regulations and requirements.