Precast Frames Connected with Unbonded Prestressing Tendons (PRESSS)

9307840 Priestley该项目开展了一项研究，旨在开发一种创新的预应力钢筋混凝土系统，该系统利用预制梁通过跨多跨框架长度连续的无粘结预应力筋连接到柱上。筋为梁提供连续性和弯矩抗力，在地震反应过程中出现弯曲裂缝时，筋保持弹性。主要任务是(L)大型组合结构试验，(2)滞回特性的模拟，(3)多层框架的时程分析，(4)设计细节的制定。通过实施这一创新的压力机系统概念，可以在增加框架延展性、简化连接设计等方面实现相当大的优势。***

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. ***