Optimization of structural solutions of wooden frame country houses for conditions of increased seismic activity

Abstract

The development of suburban construction in seismically active regions of Russia requires the creation of optimized structural solutions for wooden frame houses that ensure safety in case of earthquakes with an intensity of 7-9 points. The research is aimed at developing a methodology for constructive optimization that integrates the requirements of seismic safety with the economic efficiency of construction. The experimental base includes an analysis of 127 projects of wooden frame houses built in 2019-2024 in the seismic zones of the Krasnodar Territory, the Altai Republic and the Kamchatka Territory. Numerical modeling methods using the ANSYS software package and experimental tests of 18 full-scale samples of nodal connections are applied. The results show that optimization of structural schemes provides an increase in seismic stability by 25-32% while reducing material consumption by 15-22%. It was found that the use of glued beams in the supporting elements of the frame increases the damping coefficient to ξ = 0.12-0.15 compared with ξ = 0.08-0.10 for conventional lumber. The developed hybrid nodal connections demonstrate an increase in energy absorption capacity by 38-45% while maintaining the manufacturability of installation. The economic analysis confirms a reduction in the total cost of construction by 12-18% due to optimization of material consumption and reduction of construction time. The results obtained form the scientific and technical basis for designing cost-effective earthquake-resistant wooden frame houses in conditions of increased seismic activity.