Drift‐ and energy‐based seismic performance assessment of retrofitted wood frame shear wall buildings: Shake table tests

Abstract

In 2004, the Province of British Columbia (BC) announced a multi-year $1.5 billion seismic retrofit program for the province's 750 at-risk public schools. The purpose of this program was to quantify the seismic risk of the province's public-school buildings and to expedite the seismic upgrading of the most at-risk schools. In order to provide a safe and cost-effective implementation of this program, the Engineers and Geoscientists BC, in collaboration with the University of British Columbia, has developed a performance-based probabilistic method and guidelines for the seismic risk assessment and retrofit of low-rise buildings. As part of this initiative, a number of laboratory experiments have been conducted to provide data that would support the recommendations provided in the guidelines. The laboratory experiments included several full-scale shake table tests of wood frame systems. The specimens were subjected to sequences of earthquake motions to simulate their performance under main shock-aftershocks. This paper presents details of seven of the experiment and wood-frame buildings considered. A detailed discussion of the results of the analyses of the shake table tests data, and performance assessment using drift-and energy-based damage indices is presented. This study highlights the importance of considering the effects of subduction earthquake and mainshock-aftershock sequences for design and retrofit of wood frame structures.

Comparative analysis of mechanical properties for wood frame and reinforced concrete frame based on deformation energy decomposition method

“…Due to the complexity of the anisotropic material constitutive model, it brings many difficulties to the numerical simulation of the wood structure. Therefore, a sufficient number of experiments are needed as the basis for the research work, and probability statistical analysis method is needed to analyze its various performance indicators (Zhang et al 2020;Islam et al 2022;Ventura et al 2023). At present, research on the deformation performance of the complete wood structure is more dependent on the experiment and field test, and the corresponding theoretical analysis and numerical simulation are relatively weak.…”