Lateral Load Response of Total Precast Building Systems

该研究项目的主要目标是研究建筑物整体预制剪力墙体系在水平荷载和竖向荷载作用下的荷载-挠度反应。目标应用是在中低地震活动地区设计最多35层的建筑。这项工作将提供所需的知识，以支持与侧向荷载下的漂移限制有关的新规范条款的制定，这些条款专门适用于整个预制建筑。规范中的现行漂移限值是为现浇剪力墙系统制定的，没有考虑到由于使用的连接细节而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部分，包括对这些体系中使用的两种最常见类型的连接件的荷载-挠度反应的相对简单的测试，以及一个简单的三维剪力墙体系的缩尺模型试验。这项试验工作的结果将被用于开发适用于整个预制剪力墙系统的数值模拟策略。 这项工作有可能增加加拿大整体预制建筑的市场。这项工作将支持制定专门涉及整个预制建筑的横向荷载反应的规范规定。一般来说，工程师不愿设计，业主不愿建造没有具体规范规定的结构体系。对双方来说，具体的规范规定为证明所考虑的结构体系将能够按预期发挥其功能提供了可靠的基础。因此，缺乏专门涉及全部预制建筑的规范规定，一直是阻碍更多使用这类结构的重大障碍。通过起草专门与整体预制建筑在水平荷载下的性能有关的规范条款，拟议的研究将使这一重大障碍得以消除。通过这种方式，拟议的研究有可能增加加拿大整体预制建筑的市场。

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.