Structural Design and Performance Based Engineering for the "Banco De La Nacion" New Tallest Building in Lima, Peru

Abstract eng:
Completed in August 2015, the 30-story, 135 m high “Banco de la Nación” Tower is the new tallest building in Lima, Peru; one of the highest seismic regions in the world. This is the new headquarter of the National Bank of Peru. This paper presents a summary of the structural design, with emphasis in the seismic design by prescriptive code design and its assessment using performance-based seismic design (PBSD) approach. The main lateral resisting structural system for seismic actions is a cast-in place reinforced concrete (RC) central core; and the secondary lateral structural system consists of perimeter RC frames. The building has a raft foundation which extends to the entire basement footprint. Complementary damping system of fluid-viscous dampers is provided in the short direction in order to improve the comfort under earthquake actions and to get a similar seismic performance in both directions. The PBSD approach follows the “Tall Buildings Initiative, Guidelines for Performance-Based Seismic Design of Tall Buildings, 2010” document, developed by Pacific Earthquake Engineering Research Center (PEER). The seismic assessment using PBSD approach is based on non-linear response history analysis (NLRHA), with 14 pair spectrummatched ground motions. A summary of the key results is presented and discussed. In addition, based on results of this seismic assessment, the paper presents a discussion in regard with shortcomings in wall shear design as currently prescribed in codes as Peruvian code or ACI-318, some suggestions are included. This project represents an example of the current and future development of high-rise construction in Peru.

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