Steffen Marx is Chair of Concrete Structures at Leibniz Universit?t Hannover. He is also convener of the special task-group "High-speed railway bridges" in the fib – International Federation for Structural Concrete and he is working as expert in the design and construction of the new high-speed railway line VDE8 between Munich and Berlin in Germany. His research group has long been engaged in experimental and theoretical study on dynamic response of high speed railway bridge, track-bridge intera