Layered Soil-Synthetic Liner Base System to Isolate Buildings from Earthquakes

用于建筑物地震隔离的分层土-合成衬垫基础系统

• 批准号: 8960507
• 负责人: Behnam Hushmand
• 金额: $ 5万
• 依托单位: Earth Technology Corporation Long Beach Headquarters
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1990-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8960507&HistoricalAwards=false
• 关键词: Layered; Soil; Synthetic; Liner; Base

The importance of aseismic design of structures using base isolation techniques is becoming increasingly evident to architects and structural engineers. Many different types of base isolators, generally complex mechanical systems which require an extra floor beneath the building, have been proposed to date. Existing isolation systems are either of a pure-friction or flexible type, or a combination of the two. They reduce earthquake-induced lateral inertial forces on structures through limiting friction effects and/or lengthening the natural period of vibration of the total system. This research project studies a new base isolation system comprised of alternate geosynthetic liners and soil layers. Geomembrane and geotextile geosynthetics typically have very low friction coefficients. A layered geotextile/geomembrane-soil system provides a practical, low-cost, and simple-to- install base isolation system through low frictional properties of geosynthetics and the flexibility of a soil layer. Lateral deflection of structures may be limited by hysteretic damping of the soil layer and by soft backfill materials around the building basement. This research project is Phase I of a Small Business Innovation Research Project.

建筑结构抗震设计的重要性 采用基础隔震技术的结构， 对于建筑师来说， 和结构工程师。 许多不同 基础隔震器的类型，一般为复杂型 机械系统需要额外的 在大楼下面的地板上， 迄今 现有的隔离系统 纯摩擦型或柔性型，或 两者的结合。 它们减少 地震引起的横向惯性力 通过限制摩擦效应的结构 和/或延长自然周期 整个系统的振动。 这个研究项目研究一个新的基地 隔离系统由交替 土工合成衬里和土壤层。 土工膜和土工织物 通常具有非常低的摩擦系数。 层状土工织物/土工膜-土壤系统 提供了一种实用的、低成本的、简单的 通过下部安装基础隔震系统 土工合成材料的摩擦性能和 土壤层的柔韧性。 横向 结构的偏转可由以下因素限制 土壤层的滞后阻尼， 建筑物周围的软回填材料 地下室 该研究项目是一个小的第一阶段 商业创新研究项目。