Seismic Assessments of a 34-Story Steel Building Retrofitted with Response Modification Elements

Abstract eng:
The original structural design of this case study consisted of five basement floors and a 34-story hotel tower in Kaohsiung, Taiwan. The construction started in 1993 and the erection of the entire steel frame and the pouring of concrete slabs up to the 26th floor were completed before 1996. However, construction of the original hotel was subsequently suspended for 10 years. Recently, this building has been retrofitted and reconstructed for residential purposes. In order to meet more stringent seismic performance requirements unlike the original design, buckling restrained braces (BRBs) and eccentrically braced frames were incorporated into the seismic design of the new residential tower. This paper presents the seismic resisting structural system, seismic design criteria, full-scale test results of one BRB member and the as-built welded moment connections. The paper presents the analytical models and the seismic performance analysis for the original and the re-designed structures.

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