山区高烈度地震区公路桥梁抗震设计与隔震体系优化研究

Research on Seismic Design and Seismic Isolation System Optimization of Highway Bridges in High-Intensity Earthquake Zones in Mountainous Areas

摘要

山区高烈度地震区由于地形起伏大、地质条件复杂、地震动空间非一致性显著，公路桥梁在地震作用下面临更为严峻的安全挑战。传统以构件强度和延性提升为核心的抗震设计方法，在复杂山区桥梁结构中往往存在受力路径不清晰、地震能量集中释放以及结构损伤难以控制等问题。隔震技术通过在结构体系中引入柔性与耗能单元，实现地震能量的有效隔离与耗散，已成为提升桥梁抗震性能的重要技术途径。本文从隔震装置选型、结构整体协同、参数配置及构造细化等方面提出针对性优化策略，以期为山区高烈度地震区公路桥梁的安全设计与工程实践提供理论依据和技术参考。

Abstract

In mountainous regions with high seismic intensity, the significant terrain undulation, complex geological conditions, and pronounced spatial non-uniformity of ground motion pose more severe safety challenges for highway bridges under seismic action. Traditional seismic design methods, which primarily focus on enhancing component strength and ductility, often encounter issues such as unclear stress paths, concentrated seismic energy release, and difficult-to-control structural damage in complex mountainous bridge structures. Seismic isolation technology, by introducing flexible and energy-dissipating units into the structural system, effectively isolates and dissipates seismic energy, serving as a crucial technical approach to improving bridge seismic performance. This paper proposes targeted optimization strategies from aspects such as isolation device selection, structural overall coordination, parameter configuration, and detailed construction, aiming to provide theoretical foundations and technical references for the safe design and engineering practice of highway bridges in high-intensity seismic mountainous areas.

关键词

山区桥梁 / 高烈度地震区 / 抗震设计 / 隔震体系 / 结构优化

Key words

Mountain bridges / High intensity earthquake zone / Seismic design / Isolation system / Structural optimization

参考文献

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