"Sifcon" Connection for Precast Prestressed Concrete SeismicResistant Frames

本项目旨在探索一些新颖的想法和概念，以发展有效的PC建筑框架抗震设计和施工技术。它们包括：(1)使用由(a)预制预应力柱组成的框架系统，可能有几层楼高，带有短梁扩展，以及(b)预制预应力或部分预应力梁连接到扩展柱；(2)在距柱面一至三梁深度处放置现浇（CIP）节点，设计用于吸能塑性铰；(3)利用SIFCON（浆料浸润纤维混凝土——纤维混凝土中的终极）作为CIP节点的基体，确保高延性，增加能量吸收，减少剥落，提高荷载逆转时的抗剪能力。

This project is to explore several novel ideas and concepts for the development of effective earthquake-resistant design and construction techniques for PC building frames. They include: (1) use of a framing system made out of (a) precast prestressed columns, possible several stories high, with short beam extensions, and (b) precast prestressed or partially prestressed beams connected to the extended columns; (2) placing of cast-in-place (CIP) joint, designed to serve as an energy absorbing plastic hinge, at a distance of one to three beam depths from the face of the column; and (3) Utilization of SIFCON (slurry infiltrated fiber concret--the ultimate in fiber concrete) as the matrix used in the CIP joint to insure high ductility, increase energy absorption, reduce spalling, and improve shear resistance during load reversals.