Building Structures- Case Studies & Concepts

Single Abstract

342683 - Effect of Balcony Configuration on Overall Wind Loads

Friday, April 20
11:00 AM - 12:30 PM
Location: Ballroom B

Balconies are a common feature on mid- and high-rise buildings which alter the interaction of the wind with the building façade, and may alter the resulting wind loads. Much of the aerodynamic data which comprises building codes (i.e., ASCE 7) are based on basic building geometries with no external features. This has historically been thought to provide an upper bound of responses to wind, especially in the case of across-wind responses, due to the mitigating effect of balconies on acute vortex-shedding response. However, magnitude of any reductions that may exist requires further study. The current study presents a basic building geometry with three balcony configurations: no balconies, balconies present on each face, and balconies which wrap around the corners of the building. Wind tunnel tests were performed for a series of terrain conditions and surrounding buildings and the resulting data were used to develop basic recommendations on the mitigating effect of balconies on the overall wind loads. Results and conclusions which summarize the series of wind tunnel tests will be presented in terms of overall wind loads for the design of the primary structural system of buildings. The results will be compared to ASCE 7, and discussion of observed differences will be provided.
This presentation will be of interest to structural engineers which use either ASCE 7 for the design of their buildings or that rely on the use of wind tunnel testing for the development of wind loads. For the former audience using ASCE 7, the presentation will illustrate some of the underlying assumptions in the development of the wind loads in the Standard which are important to know when applying it to a mid- or high-rise building design. For the latter audience using wind tunnel testing, the presentation will illustrate the importance of including external features on their building models and provide grounds for comparison of a building with and without balconies. Attendees of the presentation will take away an understanding of the basic trends of the aerodynamic effects of balconies on tall buildings, as well as an appreciation of whether reduced wind loads and responses should be expected compared to values calculated using ASCE 7. These are important considerations for designers using ASCE 7 for the calculation of wind loads.

Thomas G. Mara

Research Engineer
The Boundary Layer Wind Tunnel Laboratory

n/a

Presentation(s):

Send Email for Thomas Mara

Darren J. Garnham

Project Manager
The Boundary Layer Wind Tunnel Laboratory

n/a

Presentation(s):

Send Email for Darren Garnham


Assets

342683 - Effect of Balcony Configuration on Overall Wind Loads



Attendees who have favorited this

Please enter your access key

The asset you are trying to access is locked. Please enter your access key to unlock.

Send Email for Effect of Balcony Configuration on Overall Wind Loads