Precast Frames Connected with Unbonded Prestressing Tendons (PRESSS)

用无粘结预应力筋连接的预制框架 (PRESSS)

• 批准号: 9307840
• 负责人: M. J. Nigel Priestley
• 金额: $ 15万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-15 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9307840&HistoricalAwards=false
• 关键词: Precast; Frames; Connected; Unbonded; Prestressing

9307840 Priestley This project carries out studies for the development of an innovative prestressed reinforced concrete system utilizing precast beams connected to columns by unbonded prestressing tendons continuous over the length of the multi bay frame. The tendons provide continuity and moment resistance to the beams and the tendons remain elastic when flexural cracking develops during seismic response. The major tasks are (l) testings of large scale assemblages, (2) modeling of hysterestic characteristics, (3) time history analyses of multistory frames, and (4) design details development. Considerable advantages in terms of increased frame ductility, simplified joint design, etc. might be achieved through implementation of this innovative PRESSS system concept. ***

该项目研究了一种创新的预应力钢筋混凝土系统的发展，该系统利用预制梁通过无粘结预应力筋连接到柱上，这些预应力筋在多孔框架的长度上连续存在。在地震反应过程中，当弯曲开裂发生时，筋对梁提供连续性和弯矩阻力，并保持弹性。主要任务是：(1)大规模组合测试，(2)迟滞特性建模，(3)多层框架时程分析，以及(4)设计细节开发。通过实施这种创新的PRESSS系统概念，可以在增加框架延展性，简化节点设计等方面取得相当大的优势。＊＊＊