Control of Difference of Seismic Response across Different Spans of high-speed railway multi-spans simply supported bridge

In this paper, the Difference of Seismic Response across Different Spans (DSR) in longitudinal distribution High-Speed Railway Multi-spans Simply Supported Bridge (HSRSB) under earthquake excitation is investigated, and an evaluation method which can intuitively reflect difference seismic response proposed. A feasible way to strengthen connection stiffness between adjacent girders proposed control DSR. The rationality finite element model used verified by comparing numerical results with experimental ones, showing a satisfactory agreement. Comparing bridge considering subgrade-track constraints (BCTM) without (BWTM), it found that DSR causes some new disadvantages, are neglected BWTM. BCTM Level Controller (DLC) generates called BCDM. effect number span on studied based analysis showed DLC suppresses reduces most components. It also transfers disadvantage from part structure. As more convenient cost-effective repair base plate subgrade than components after event, transfer favor forming anti-seismic system structure protect part.