Council on Tall Buildings and Urban Habitat
 Seismic Issues Workshop, Shanghai 2014
See more on the Seismic Design Working Group
September 16, 2014

SHANGHAI - Seismic issues tend to be the predominant controlling factor in tall building structural design, particularly along the Pacific Rim. Several presenters in this afternoon session illustrated some real-world techniques for tackling these challenges.

Session Chair / Speaker:
John Viise, Associate Principal, Halvorson & Partners

Presentation Speakers:
Kanokpat Chanvaivit, Senior Design Manager, Bouygues – Thai Co. Ltd.
Chunhe (Henry) Li, Group Director, Buro Happold
Mario Lafontaine, Director, Rene Lagos Engineers
Davy Sukamta, Principal, Davy Sukamta & Partners 
Speakers answer delegates questions at the end of the technical workshop.

MahaNakhon Tower and the Use of CTBUH Seismic Guidelines

Kanokpat Chanvaivit, Senior Design Manager, Technical Department, Bouygues-Thai discussed the design process behind MahaNakhon Tower, a 77-story mixed-use development in Bangkok, Thailand. Chanvaivit presented an enlightening chronicle of how his design team applied CTBUH Recommendations for the Seismic Design of High-rise Buildings (2008), Appendix B to the project.

John Viise, Associate Principal, Halvorson & Partners introduces the speakers. Kanokpat Chanvaivit, of Bouygues – Thai Co. Ltd., discussed the design process behind MahaNakhon Tower.
Seismic Action Reduction in Supertall Building Design

Chunhe (Henry) Li, Director, Strucutral Engineering, Buro Happold, Beijing, presented the results of his study of the ways to reduce seismic action in tall buildings to a value as close as possible to the minimum base shear force specified in the code, through influence of mass, stiffness and damping of a structural system. As an example, Li discussed the application of these principles in the engineering a of 310-meter building in a strong seismic zone, the Wanda Plaza in Kunming, China.
Chunhe (Henry) Li, Group Director, Buro Happold discusses ways to reduce seismic action in tall buildings. Mario Lafontaine, of Rene Lagos Engineers describes how the seismic system for Nunoa Capital Building was chosen.
Seismic Base Isolation of the Nunoa Capital Building

Mario Lafontaine, Director, Rene Lagos Engineers, Santiago, described the selection process for a seismic protection system for the Nunoa Capital Building, the tallest base-isolated residential building in the Americas. He illustrated his talk with an evaluation of the seismic performance of this 33-story, 42,600 square-meter building when it was protected with viscous walls and a lead rubber bearing base isolation system.
A delegate asks a question during the Q & A session.
Advances in Seismic Design and Construction in Indonesia

Davy Sukamta, Davy Sukamta & Partners, Structural Engineers, updated the workshop on current practices developed for seismic design and construction in Indonesia since the devastating Aceh Earthquake of 2004. His talk highlighted the advances in seismic-resistant design and construction practice in Indonesia, from the development of new codes, to the state of practice in design offices and the application of new technology in the construction industry.
Davy Sukamta, Principal, Davy Sukamta & Partners discusses current practices in seismic design. John Viise, Associate Principal, Halvorson and Partners describes the potential of BRBs and FVDs.

Proposed Changes to the Recommendations for the Seismic Design of High-rise Buildings

John Viise, Associate Principal, Halvorson and Partners, described the potential of buckling restrained braces (BRBs), and fluid viscous dampers (FVDs).  Although these alternate approaches are less stiff than a typical outrigger, they provide superior energy dissipation under dynamic loading while avoiding the large localized forces associated with conventional outriggers, he said.