I am performing pushover analysis in Etabs of a steel braced frame but oI do not know what value should I use for target displacement. The height of the building is 20m. I want to know what value should I use according to ASCE 41-17?
Please help me to solve this issue.
Dear Mohd,
The target displacement of structural systems must be predicted by using the coefficient method or capacity spectrum method (CSM). Moreover, the target displacement can be determined automatically by SAP2000 software. The coefficient and CSM methods have been described comprehensively in FEMA-356 and ATC-40 provisions, respectively.
For braced steel frames and under the design-basis earthquake, the target story drift is equal to Cd* δ. Where, Cd is the amplification factor (equals to 3.25 to 5 depending of the bracing type) and δ is the elastic story drift under the design lateral loads. Under the maximum considered earthquake, FEMA recommend using a target maximum story drift of 2.0% from the story height for ordinary concentrically braced frames.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Metals
- Alloys
- Steel