Research Initiation: Seismic Behavior of Tiedback RetainingWalls

研究启动：系式挡土墙的抗震性能

• 批准号: 8810172
• 负责人: Thomas Siller
• 金额: $ 5.99万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-15 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8810172&HistoricalAwards=false
• 关键词: Research; Initiation; Seismic; Behavior; Tiedback

Tied-back (anchored) retaining walls formerly were used mostly to support temporary earth excavations. However the use of this type of wall construction for permanent structures has recently become more widespread, especially along highway interchanges and as shoreline structures. The advantages of this type of construction over the more conventional cantilever and gravity walls include lower cost for large wall heights (over 50 feet), and easier construction. However, there are at present no rationally-based design procedures in use for these walls that account for seismic loading. Due to the fact that tied-back walls have traditionally been used as temporary structures, very little research has been directed to the seismic design of such structures. This research project is an analytical investigation of the seismic response of flexible tied-back retaining walls. It is directed toward determining and quantifying the mechanisms of earthquake load resistance that develop for this type of retaining structure. Emphasis is being placed on evaluating the response of systems comprising a range of wall and anchor geometries, while accounting for inelastic soil behavior. The interaction effects of the system components (i.e. the wall, anchors, and soil) during seismic loading is being studied. The improved understanding of the contributions from various components to the dynamic response is being incorporated into preliminary design recommendations. These recommendations lead to a design procedure that accounts rationally for the effects of earthquake loading.

以前主要采用的是拉锚式挡土墙 以支持临时土方开挖。 然而，使用 用于永久性结构的这种类型的墙结构具有 最近变得更加普遍，特别是沿沿着 立交桥和海岸线结构。 的优点 这种类型的结构超过了传统的悬臂 重力墙对于大的墙高来说成本较低 (over 50英尺），和更容易的建设。 然而，在 目前没有合理的设计程序用于这些 地震荷载的墙壁。 原因是 回拉墙传统上被用作临时的 结构，很少有研究已经针对地震 这种结构的设计。 本研究项目是对 柔性挡土墙的地震反应 是 旨在确定和量化的机制 为这种类型建筑开发的抗震能力 支护结构 重点是评价 包括一系列墙和锚的系统的响应 几何形状，同时考虑非弹性土壤行为。 的 系统部件（即壁， 锚和土壤）在地震荷载作用下的破坏。 的 更好地理解来自不同组织的贡献 组件的动态响应被纳入 初步设计建议。 这些建议 导致一个设计程序，合理地考虑到 地震荷载的影响。