Reduction of the Longitudinal Seismic Response of High-Speed Railway Multi-Span Simply-Supported Bridges by the Track Constraint

ABSTRACT

The longitudinal seismic response reduction in railway bridges is worthy of attention because it relates to the engineering cost. It is difficult to further explore the reduction effect because the complexity of traditional analysis model leads to the low efficiency in parametric analysis. In this paper, the track structure was simplified, and a simplified calculation model was established. The parametric analysis considering the span number and pier height on the simplified model seismic responses was carried out. The results showed that the reduction effect was extensive and there was a great internal force transferred to the subgrade-track structure.

KEYWORDS:

• Track constraint
• high-speed railway simply-supported bridge
• reduction effect
• simplified model
• seismic responses

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study was funded by the National Natural Science Foundations of China [U1934207, 52078487 and 51778630], the Innovation-driven Plan in Central South University [2020zzts159].