Seismic Damage Assessment and Shaking-Table Test Validation of Midrise Cold-Formed Steel Composite Shear Wall Buildings

This paper proposes damage index-based limit-state criteria for seismic design of midrise cold-formed steel (CFS) buildings instead of the drift-based ones, and the Park-Ang damage model was used to calculate the damage indexes. Two 5-story CFS buildings with different wall configurations were tested, and a test-validated numerical model was developed. An incremental dynamic analysis was conducted on a typical midrise CFS building to obtain the degradation parameter beta of different CFS walls. The damage indexes computed from numerical analyses were compared with the damage indexes estimated from test observations and the proposed damage index-based limit-state criteria. The results showed that the calculated degradation parameter as well as the proposed damage index-based limit-state criteria are effective for seismic damage assessment and damage level classification of midrise CFS buildings according to the validations by shaking-table tests on two CFS buildings. The Park-Ang damage index used in this paper and the proposed limit-state criteria could be used for performance-based seismic design of midrise CFS buildings. (C) 2022 American Society of Civil Engineers.

Automated summary

This paper proposes damage index-based limit-state criteria for seismic design of midrise cold-formed steel buildings, and the Park-Ang damage model is used to calculate the damage indexes. The results of test-validated numerical models and incremental dynamic analysis show that the proposed criteria are effective for assessing and classifying the damage of midrise CFS buildings.