Evaluation and Repair of Concrete Tilt-up Systems

该项目得到了地震修复/恢复研究倡议(NSF 90-23)第二阶段(第二年)计划的支持。预制混凝土倾斜结构在美国各地被广泛用于一层和两层仓库、写字楼和购物中心。倾斜式结构建造起来很经济，但在地震期间它们容易受到严重的结构破坏。该项目的目标是制定评估现有倾斜施工中地震危险性的指导方针，并开发减轻地震危险性的方法。危险。工作的重点是四个方面：(1)屋面连续墙与倾斜墙板的连接，(2)相邻墙板之间的连接，(3)墙板与楼板和基础的连接；(4)大开孔墙板的强度和稳定性。将开发分析模型来计算美国各地使用的建筑系统的动态响应以及具有代表性的细节和实验室测试将实行结构性制度。

This project is supported in the Phase 2 (second year) program of the Seismic Repair/Rehabilitation Research Initiative (NSF 90-23). Precast concrete tilt-up structures are widely used throughout the U.S. for one and two-story warehouses, office buildings, and shopping centers. Tilt-up structures are economical to build; however, they are susceptible to severe structural damage during earthquakes. The objective of this project is to develop guidelines for evaluating the seismic hazards in existing tilt-up construction and develop methods for mitigating those hazards. The work focuses on four areas: (1) connection of the roof diaphragm to the tilt-up wall panels, (2) connection between adjacent wall panels, (3) connection of the wall panels to the floor slab and foundation, and (4) strength and stability of wall panels with large openings. Analytical models will be developed to calculate the dynamic response of building systems used throughout the U.S. and laboratory tests of representative details and structural systems will be performed.