Performance Based Seismic Evaluation of Underground Structures

基于性能的地下结构抗震评估

• 批准号: 0000136
• 负责人: Julio Ramirez
• 金额: $ 12万
• 依托单位: Purdue Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-15 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0000136&HistoricalAwards=false
• 关键词: Performance; Based; Seismic; Evaluation; Underground

0000136RamirezThe Daikai Station Kobe, Japan was the first underground structure not crossing an active fault the collapsed during an earthquake. Preliminary analysis and that of others have indicated that the middle column was grossly inadequate to resist lateral deformations. However, the Daikai failure is only a warning. The numerous examples of damage and even complete collapse of underground structures observed during the Kobe Earthquake help define a problem that merits serious investigation. Of great concern is that there may be in the USA and Japan, underground structures under similar conditions to the Daikai Station. The problem is multifaceted in that it requires that approaches be developed to both conduct the earthquake risk assessment of existing underground structures as well as the design of new ones, given the appropriate ground motion characteristics. This calls for clearly defining structural performance not only in terms of safety, but serviceability as well. The objectives of this research project are: Identification and evaluation of the load-transfer mechanisms between the ground and the structure during a seismic event, (2) Determination of the deformation capacity of reinforced concrete members during inelastic cycles of displacement, (3) Development of new techniques and criteria for seismic performance of cut and cover underground structures and identification of critical elements for cumulative damage assessment of cut and cover underground structures.The research team in this project includes USA and Japan based structural and geotechnical engineers from both academia and practice.This project is supported under the 3rd-year competition under NSF 98-36. "US Japan Cooperative Research in Urban Earthquake Disaster Mitigation."

0000136拉米雷斯日本神户大开站是第一个在地震中倒塌的不跨越活动断层的地下结构。 初步分析和其他分析表明，中间柱严重不足以抵抗横向变形。 然而，大开的失败只是一个警告。 神户地震期间观察到的大量地下结构受损甚至完全倒塌的例子有助于确定一个值得认真调查的问题。 令人高度关注的是，美国和日本可能存在与大开站条件类似的地下建筑。 这个问题是多方面的，因为它需要开发方法来对现有地下结构进行地震风险评估，并在适当的地面运动特征的情况下设计新的地下结构。 这就要求不仅在安全性方面，而且在可维护性方面明确定义结构性能。 该研究项目的目标是：识别和评估地震事件期间地面和结构之间的荷载传递机制，(2) 确定钢筋混凝土构件在非弹性位移循环期间的变形能力，(3) 开发明挖回填地下结构抗震性能新技术和标准的研究，以及明挖回填地下结构累积损伤评估关键要素的识别。该项目的研究团队包括来自学术界和实践界的美国和日本结构和岩土工程师.该项目得到以下支持NSF 98-36 下的第三年竞赛。 “美日城市防震减灾合作研究”。