Evaluation and Repair of Concrete Tilt-up Systems

该项目得到了 第二阶段（第二年）计划 地震修复/恢复 研究倡议（NSF 90-23）。 预制混凝土上倾结构 在美国被广泛使用。 对于一层和两层的仓库， 办公楼和购物中心 中心. 上倾结构是 经济建设;然而，他们 容易受到严重的结构性 地震时的损坏。 该项目的目标是 制定评估准则 现有的地震灾害 倾斜式建设与发展 减轻这些问题的方法 隐患 工作重点在四个方面 区域：（1）屋顶的连接 横隔板至上倾墙 面板，（2）连接 相邻墙板，（3）连接 连接到楼板上 （4）基础;（4）强度， 大尺寸墙板的稳定性 开幕式 分析模型将 用来计算 建筑系统的反应 在美国和实验室 代表性细节的测试， 结构系统将 执行。

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.