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JANUARY 2019 Professional meeting

Topic: Wind Effects on Bridge Structures

Speaker: Mr. Sumanth Cheruku, P.E., Project Engineer, Pivot Engineers

Date: Thursday, January 31st, 2019

Time: 11:30 AM - 1:00 PM (lunch to be served)

Location: Ferguson Structural Engineering Laboratory at the University of Texas at Austin’s J. J. Pickle Research Center (Bldg. FS1 on Pickle Research Campus).  A map of the Pickle Research Campus can be found at http://www.utexas.edu/maps/prc/.

Registration: Register using the form below. If you have have any issues registering, please contact us at sei@austinasce.org.

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Presentation Summary

Guidance on wind effects on structure is predominantly limited to equivalent static loads with some additional provisions that acknowledge aerodynamic phenomena and their effects. AASHTO provisions include that aeroelastic phenomena of vortex excitation, galloping, flutter and divergence shall be considered where applicable, however, limited guidance is provided on these phenomena and where these effects may be consequential. This presentation will explore some of these aerodynamic phenomena - the mechanism, structural response, affected limit states and finally some guidance to circumvent/mitigate these effects in new/existing structures - through case studies. The presentation will discuss Vortex-induced vibration of cables and lighting poles, Rain-Wind induced vibration/Dry-cable galloping of stay cables and finally, “Torsional Flutter” of bridge decks (the collapsed Tacoma Narrows bridge) and some unsuspecting structures

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Sumanth Cheruku, P.E. - Pivot Engineers

Sumanth Cheruku is a Project Engineer with Pivot Engineers. He is the Secretary of Ch 29 Task committee of ASCE 7 standard and an active member of ASCE and AIAA. He is a contributing member of the SEI committee on “Cable-Supported Bridges” and the Chair of the new task committee on “Aerodynamic Phenomena of Civil Engineering Structures” of the Wind Engineering Division of ASCE.

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