Displacement-Based Design of Multi-Span Bridge considering Near-Fault Earthquake Effect

Abstract

This paper aims to study the displacement design method of multi-span bridges In the nonlinear displacement response evaluation the displacement amplification factor is used to convert between the maximum elastic displacement and the inelastic maximum displacement The single-degree-of-freedom nonlinear time history analysis is carried out with a large number of earthquake records including 142 near-fault seismic records and 1775 far-fault seismic records The regression analysis of the analysis data is applied to the displacement amplification factor formula of the near fault zone and the general zone The nonlinear dynamic analysis of the full bridge is used to verify that the analyzed displacement amplification factor is effectively available in the multi-degree-of-freedom bridge system In addition a rule 3 cross-bridge example and an irregular 4 cross-bridge example are used for trial calculation of the displacement-base design method And compared with the force-based design method under the same design level the rationality of the designed target displacement is verified by nonlinear dynamic analysis Finally the engineering design parameters are reviewed

Date of Award	2019
Original language	English
Supervisor	Kuang-Yen Liu (Supervisor)