Seismic Behavior and Design of Double-Tee Panel Precast Systems

双T形板预制系统的抗震性能和设计

• 批准号: 9412906
• 负责人: Jose Pincheira
• 金额: $ 18.5万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9412906&HistoricalAwards=false
• 关键词: Seismic; Behavior; Design; Double; Tee

9412906 Pincheira Precast construction using double-Tee members is common in parking garages, commercial and industrial buildings across the United States and has had wide success because of its proven efficiency an economy. the double-Tee's are used as walls and diaphragms. Unfortunately the systems were developed primarily for vertical load resistance. New areas of the country have recently been designated as seismically active and building codes have tightened their seismic design requirements. These changes have cast doubt on the use and capacity of precast structural systems, and lack of thorough evidence to the contrary will likely result in more conservative design required by future codes. The goal of this project to establish a proven physical basis for connection capacities between thin concrete flange sections such as joint between double-Tee's used as wall or diaphragm panels to improve design methods for seismic resistance. To achieve the objective extensive cyclic connection testing will be carried out. The connection test results will be used to develop nonlinear analysis methods and to suggest code changes such as: rational methods of selecting flange or diaphragm thickness and topping thickness if needed, means of estimating appropriate load reduction factors for precast double-Tee shear walls, steps in designing ductile flange connections between members, and examples showing non linear design procedures for jointed precast prestressed diaphragms and walls. This is a PRESSS project. ***

9412906 Pincheira使用双T形构件的预制建筑在美国各地的停车场、商业和工业建筑中很常见，由于其经证明的效率和经济性而获得了广泛的成功。 双T形件用作壁和隔板。不幸的是，这些系统主要是为了抵抗垂直载荷而开发的。 该国新的地区最近被指定为地震活跃区，建筑规范也收紧了抗震设计要求。 这些变化使人们对预制结构系统的使用和能力产生了怀疑，缺乏充分的相反证据可能会导致未来规范要求的更保守的设计。 本项目的目标是为薄混凝土翼缘段之间的连接能力（如用作墙或隔板的双T形接头之间的连接）建立经过验证的物理基础，以改进抗震设计方法。 为实现目标，将进行广泛的循环连接测试。连接测试结果将用于开发非线性分析方法，并建议规范变更，例如：合理选择翼缘或横隔板厚度和顶层厚度的方法（如果需要），估算预制双T形剪力墙适当荷载折减系数的方法，设计构件之间延性翼缘连接的步骤，和实例显示非线性设计程序的联合预制预应力隔膜和墙壁。 这是一个PRESSS项目。 ***