Lateral Load Response of Total Precast Building Systems

拟议的研究项目的主要目标是表征总预制剪力墙系统的横向和垂直荷载下的建筑物的荷载-挠度响应。目标应用是在低到中等地震活动地区设计高达35层的建筑物。这项工作将提供所需的知识，以支持新的规范规定的发展，特别适用于总预制建筑物的横向荷载下的漂移限制。现行规范中的偏移限值是针对现浇剪力墙系统制定的，没有考虑到由所用连接细节引起的整个预制系统的独特荷载-挠度特性。 这项工作将包括一个重要的实验组成部分，包括相对简单的测试的两个最常见的类型的连接器在这些系统中使用的负载偏转响应，和一个简单的三维剪力墙系统的比例模型测试。这项实验工作的结果将被用于开发适合于总预制剪力墙系统的数值建模策略。 这项工作有可能增加加拿大整体预制建筑的市场。这项工作将支持专门针对整体预制建筑横向荷载响应的规范条款的制定。一般来说，工程师不愿意设计，业主也不愿意建造没有具体规范规定的结构系统。对于双方而言，具体的规范条款为证明所考虑的结构系统能够按预期发挥其功能提供了可靠的基础。因此，缺乏专门与全预制建筑物相关的规范规定，是阻止更多使用此类结构的一个重大障碍。通过起草专门涉及横向荷载下整体预制建筑性能的规范条款，拟议的研究将消除这一重大障碍。通过这种方式，拟议的研究有可能增加加拿大总预制建筑的市场。

The proposed research project has as its primary objective to characterize the load-deflection response of total precast shear-wall systems for buildings under lateral and vertical load. The target applications is the design of buildings of up to 35 storeys in areas of low to medium seismicity. This work will provide the knowledge required to support the development of new code provisions related to drift limits under lateral load that apply specifically to total precast buildings. Current drift limits in the code were developed for cast-in-place shear wall systems and give no consideration to the unique load-deflection characteristics of total precast systems that arise from the connection details used. The work will include a significant experimental component, consisting of relatively simple tests of the load-deflection response of the two most common types of connector used in these systems, and of a scale model test of a simple three-dimensional shear-wall system. The results of this experimental work will be used in the development of numerical modeling strategies suitable for total precast shear wall systems. The work has the potential to increase the market for total precast buildings in Canada. The work will support the development of code provisions pertaining specifically to the lateral load response of total precast buildings. In general, engineers are reluctant to design and owners are reluctant to build structural systems for which specific code provisions are not available. For both parties, specific code provisions provide a reliable basis for demonstrating that the structural system under consideration will be capable of performing its function as intended. The absence of code provisions that relate specifically to total precast buildings has thus been a significant barrier preventing the greater use of this type of structure. By enabling the drafting of code provisions that relate specifically to the performance of total precast buildings under lateral load, the proposed research will enable this significant barrier to be removed. In this way, the proposed research has the potential to increase the market for total precast buildings in Canada.