Pioneered in the 1960's by Norwegian Engineer Per Tveit, network tied arches offer significant advantages in terms of stiffness, material consumption, and resiliency under extreme loading when compared to traditional tied arches with vertical hangers. The structural system is characterized by two families of longitudinally inclined hangers, such that hangers cross each other to form a network, resulting in a configuration that combines the advantages of arch, truss, and cable stayed bridges.
Over the past twelve years Gregor Wollmann has been involved in the design and construction of four network arch bridges in the United States, including the world's largest bridge of this type. In this presentation he will explain the advantages of this system and share his experiences gained on these projects.
Network Tied Arches
Background and History of Network Tied Arch Bridges
Structural System of Network Tied Arch Bridges
Design for Accidental Hangerloss
Deck Systems and Tie Girder Redundancy
Hangers and Their Connections
Erection Engineering and Hanger Tuning
Name & Title
Gregor Wollmann, Structural Engineer at HNTB
Master of Science and PhD in Structural Engineering at The University of Texas at Austin
Bachelor of Science in Structural Engineering at Technical University Vienna