DYNAMIC RESPONSE ANALYSIS OF HIGH-SPEED RAILWAY BRIDGE UNDER EARTHQUAKE ACTION

摘要

A full model of the multi-span simply supported bridge is established by finite element method, and natural vibration properties of structure are analyzed. According to theory of elasticity and elastic-plasticity, earthquake responses of bridge are respectively calculated at different speeds, different strong motion record and different earthquake acceleration and so on. The calculation result shows that the bottom of pier step into state of elastic-plasticity, displacements of structure in terms of theory of elastic-plasticity is increased, and it is necessary to take measures to guard against accidents to ensure security.