Probability Design of Diaphragms and Intercomponent Connection Systems in Light-Frame Wood Buildings

尽管在美国建造的轻框架木结构建筑比任何其他类型的建筑都要多，但它们的设计过于简化，没有反映结构分析和木材科学的现代发展。提出的研究旨在开发基于概率设计的方法原型，以及将该方法应用于典型（基线）隔膜、弯曲组件和组件之间连接所需的数据。该研究计划要求使用材料和接头性能的概率密度函数来模拟组件系统和组件连接的样本。对仿真系统进行分析，以获得极限载荷和临界挠度等参数限制性能。因此，将生成一组概率密度函数，这些函数可以与外部载荷谱进行比较，以评估超出设计极限的概率。结果将纳入设计方法开发作为另一项任务提出的研究。这些数据将有助于校准未来木结构建筑系统的规范。该方法将以一种可供实践工程师和建筑商评估的形式呈现。这项研究将由俄勒冈州立大学（OSU）和华盛顿州立大学（WSU）的研究团队合作进行。在过去的4年里，两个小组的主要研究人员有着成功的合作历史，目前正在协调被美国国家科学基金会授予合作项目的平行研究。

Although more light-frame wood buildings are erected in the United States than any other type of construction, their design is oversimplified and does not reflect modern developments in structural analysis and wood science. The proposed research is aimed at developing both a prototype of methodology for a probability-based design and the data needed for application of the methodology to typical (baseline) diaphragms, bending components, and connections among components. The research plan calls for using the probability density functions for material and joint properties to simulate samples of systems of components and component connections. The simulated systems will be analyzed to obtain the parameters limiting performance, such as ultimate load and critical deflections. Thus, sets of probability density functions will be generated that can be compared to external loading spectra for assessing the probability of exceeding design limits. Results will be incorporated into the design methodology developed as another task of the proposed research. The data will be useful in calibrating the code for future wood building systems. The methodology will be presented in a form ready for evaluation by practicing engineers and builders. The research to be conducted is a cooperative effort of research teams at Oregon State University (OSU) and Washington State University (WSU). The principal investigators of the two teams have a history of successful cooperation in the past four years and are currently coordinating parallel investigations that were awarded as cooperative projects by the National Science Foundation.