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Abstract

In order to improve the safety of bridges in western mountainous areas, the seismic response of longitudinal pier height difference to structures was studied. Firstly, the research case was clearly defined, and the simple supported and continuous structures under standard span were selected as the research objects according to the actual engineering demand and extension. Then, the response law of the structure under transverse and longitudinal earthquakes was studied by continuously changing the pier height of a span. Finally, based on the obtained structural response, the simplified bending moment curvature relation was used to judge the safety of the structure. The results show that the bending moment and axial force of the high pier are less affected by the height of the low pier. The bending moment of the low pier presents a quadratic curve, and the peak value appears before the equal-height pier. The axial force of the low pier presents a non-uniform increase due to the coupling effect of increasing dead weight and increasing inertia force. When the vertical pier height difference is within 5 m, special attention should be paid to the seismic response of the low pier under transverse and longitudinal earthquakes.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.028

First Page

152

Last Page

156

Submission Date

May 2025

Reference

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