高烈度区重力式挡墙基于性能的抗震设计方法研究

Performance-based Seismic Design of Gravity Retaining Walls in High Intensity Regions

介绍基于性能抗震设计的核心理念,以支挡结构震害调查分析为背景,阐述开展高烈度区重力式挡墙基于性能抗震设计研究的必要性;构建重力式挡墙基于性能的抗震设计框架,归类分析现行规范与基于性能抗震设计的关键技术问题;依据支挡结构震害调查及大型振动台模型试验,提出位移指数可作为衡量挡墙抗震性能的量化指标,确定重力式挡墙基于性能抗震设计的性能准则及流程;经对比计算基于性能与规范抗震设计的挡墙算例,显示基于性能抗震设计的优越性,为高烈度区重力式挡墙基于性能抗震设计的工程应用提出建议。

In this paper,the core idea behind seismic performance-based design is first introduced.Based on a seismic damage survey of retaining walls,the research necessities of seismic performance-based design for gravity retaining walls in high seismic intensity areas are explained.For establishing a framework for seismic performance-based design methods,key technical problems of current specifications and seismic performance-based design methods are summarized.According to large-scale shaking table tests of retaining walls,conclusions about which displacement index can be used as a measure of the seismic performance of retaining walls are presented,along with the criteria and flows of seismic performance-based design methods.Through comparisons between seismic performance-based design methods and specifications of retaining wall examples,the advantages of seismic performance-based design methods are demonstrated.Finally,engineering application suggestions for seismic performance-based design of gravity retaining walls in high seismic intensity areas are proposed.