A Parallel Scheme of Friction Dampers and Viscous Dampers for Girder-End Longitudinal Displacement Control of a Long-Span Suspension Bridge under Operational and Seismic Conditions

Benefitting from economic development and technological progress, long-span suspension bridges, with their superior span capacity good economy, have been built in large numbers recent decades. However, the excessive cumulative longitudinal displacement at girder ends process of bridge operation leads to degradation of, fatigue damage to, connecting components. This study aims solve problem an effective parallel damping scheme friction dampers viscous dampers. Firstly, phenomenon that quasi-static accounts for majority is confirmed by decomposition measured data end, which caused asymmetric geometric deformation main cable induced moving vertical loads a bridge. An efficient control performance analysis method proposed based on formation mechanism displacement. Secondly, damper continuous model employed achieve respect Thirdly, order realize target operational seismic dual control, proposed, aiming reduce value state, maximum