Seismic assessment of cold-formed steel stud bracing wall panels using direct displacement based design approach

Abstract

An important advancement in structural engineering in recent years has been the development of performance-based design (PBD). However, its application to cold-formed steel framed buildings remains largely unexplored. This paper presents the assessment of the bracing capacity of cold-formed steel stud bracing wall panels using a direct-displacement based design (DDBD) approach. The fundamentals of DDBD using equivalent damping, and inelastic displacement response spectra approaches are presented. These wall parameters needed for each approach are evaluated from experimental load-deflection response behaviour under quasi-static cyclic loading. Results obtained from the DDBD approach are compared with results from conventional non-linear time history analyses (NLTHA) to confirm the validity of the adopted approach. It is found that results estimated from DDBD method using inelastic displacement response spectra approach correlated much better with NLTHA results than the equivalent damping method.

Analysis on displacement‐based seismic design method of recycled aggregate concrete‐filled square steel tube frame structures

“…Assuming that the horizontal earthquake loads the inverted triangle distribution, the horizontal seismic force F i for each mass point is obtained by associating ( 4) to (7), as shown in Equation (8).…”

“…Therefore, at the end of the last century, scholars proposed a performance‐based seismic design method, 6,7 which takes the level of seismic performance as the control objective. Among them, displacement‐based is an important branch of the performance‐based seismic design method, which reflects the performance state of building structures under different intensity earthquakes through displacement 8–10 . The displacement‐based design method has many advantages over the traditional force‐based seismic design method, 11,12 such as a clear understanding of the deformation condition during structural damage and the ability to meet multi‐level seismic requirements.…”

“…Among them, displacement-based is an important branch of the performance-based seismic design method, which reflects the performance state of building structures under different intensity earthquakes through displacement. [8][9][10] The displacement-based design method has many advantages over the traditional force-based seismic design method, 11,12 such as a clear understanding of the deformation condition during structural damage and the ability to meet multi-level seismic requirements. The performance design of seismic structure based on displacement first needs to determine the performance design control parameters such as seismic strengthening level, performance level, and performance objective, while considering the importance of the building structure, site conditions, and the needs of the owner, to carry out the performance design not lower than basic seismic strengthening objective.…”

Extension of direct displacement‐based design for quantifying higher mode effects on controlled rocking steel cores

“…[ 15 ] Shahi e al. [ 16 ] examined the seismic performance of steel stud bracing walls and found that demands determined from standard DDBD method using inelastic spectra were in better agreement with NLTHA results than the equivalent damping approach. Comprehensive and well‐validated studies have also been conducted in the recent past to use the DDBD procedure for masonry wall structures, [ 17,18 ] frame‐wall structures, [ 19–21 ] and timber structures.…”