Guadua angustifolia has emerged as a sustainable structural material with high potential for low-rise rural construction, particularly in seismic regions. This study investigates the structural behaviour of bamboo portal frames under lateral loads, aiming to provide technical criteria for the design of rural housing. A total of 18 numerical models were developed in ANSYS APDL, combining two frame configurations (Model 1 and Model 2), three roof inclination angles (20 \(^{\circ }\) , 25 \(^{\circ }\) , and 30 \(^{\circ }\) ), and three aspect ratios ( \(L/H = 1.4\) , 1.5, and 1.6). PIPE288 elements were used to represent bamboo members, and COMBIN14 spring-damper elements for the connectors. Mechanical properties were obtained from experimental characterisation studies conducted on specimens from Villavicencio, Meta [10]. Applied lateral loads ranged from 5 to 20 kN in increments of 5 kN. The configuration with an aspect ratio of 1.6 and a 30 \(^{\circ }\) roof inclination (Model 1) showed the highest lateral stiffness, reaching 81.24 kN/mm. Improved structural performance was observed with increasing inclination angle and aspect ratio. The results support the use of Guadua angustifolia as an efficient and sustainable construction solution for rural contexts, promoting resilience to seismic events and the use of locally available materials. Future studies should incorporate nonlinear analysis, experimental validation, and probabilistic treatment of material variability.
