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Blown away: Citicorp Center Tower repairs revisited
1National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8611.
The Engineers Journal
|July 1, 2021
Summary
Face winds impose greater structural demands on skyscrapers than corner winds, contrary to previous assumptions about the Citicorp Tower. This finding impacts future skyscraper design and structural integrity assessments.
Area of Science:
- Structural Engineering
- Aerodynamics
- Architectural Engineering
Background:
- The Citicorp Tower, a 59-story skyscraper, underwent emergency strengthening in the 1970s.
- Previous concerns focused on the building's ability to withstand corner winds.
Purpose of the Study:
- To compare the structural demands of face winds versus corner winds on the Citicorp Tower.
- To utilize aerodynamic databases for structural analysis.
Main Methods:
- Database-Assisted Design (DAD) was employed.
- The Tokyo Polytechnic University Aerodynamic Database was utilized for wind load analysis.
Main Results:
- Face winds exert more significant structural demand on the Citicorp Tower than corner winds.
- This contrasts with the historical focus on corner wind vulnerability.
Conclusions:
- The study reveals a critical, previously underestimated factor in skyscraper structural analysis.
- Findings suggest a need to re-evaluate wind load assessments for tall buildings, particularly those with similar structural designs.
Keywords:
Citicorp TowerDatabase-Assisted Designacross-wind excitationaerodynamic databasealong-wind excitationcorner windengineering ethicsface windoverturning momentvortex-sheddingMore Related Videos
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