Civil Engineering Association

Performance-Based Seismic Evaluation of Ping An International Finance Center



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[*]Abstract: This paper discusses the analysis procedure adopted for performance evaluation of Ping An International Finance Center in Shenzhen, China. Upon completion, the 115 story tower 660 meters tall will become the world's second tallest building and tallest building in China. The selected structural system consists of a composite concrete core, seven exterior double layer belt trusses, four sets of steel outriggers, eight super columns and super diagonal braces between super columns. Given the scale and importance of this building, a rather sophisticated evaluation of seismic performance during a rare earthquake (2% probability in 50 years or 2475 year return period) was performed. Two synthetic and five recorded ground motions were selected for the nonlinear time-history analysis. These ground motions were scaled to meet the provisions in China Seismic Code; BG50011-2008. The performance levels for immediate occupancy, life safety and collapse prevention were set based on ASCE 41-06 "Seismic Rehabilitation of Existing Buildings" (2006). Complex 3D computer models with geometric and material nonlinearities were generated for nonlinear dynamic time-history analyses. The detailed performance assessments of main structural elements such as coupling beams, core walls, super columns, outriggers, belt-trusses and super-diagonal braces are presented in this paper.
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