Non-linear performance of tall buildings under wind actions

安大略省和加拿大高层建筑的持续增长增加了对可持续城市栖息地的需求。目前，大多数高层建筑的设计都是按照施工规范和标准，采用基于规范的设计方法。虽然目前的“基于规范”的设计方法更易于应用，但一些研究已经突出了它在现实世界中的局限性。在过去的几十年里，基于性能的设计(PBD)方法已经成功地应用于抗震设计中，要求建筑的结构体系提供预期的性能，而不是公开规定如何建造它。然而，对于高层建筑来说，风设计是必不可少的，但情况并非如此。这项研究项目与工业伙伴(即Entuitive)合作，研究高层建筑在风作用下的非线性行为，这是实现基于性能的高层建筑风设计的关键。这项研究将通过以下三个里程碑完成：(I)将对安大略省主要城市进行详细的气候分析，以解决高风速和持续时间的联合可能性，这对确定潜在风暴的长度至关重要；(Ii)将通过对典型高层建筑形状进行几次风洞压力测试，建立一个空气动力学数据库，(Iii)将使用里程碑II中的空气动力学数据库进行结构非线性动力分析，考虑从里程碑I获得的风暴持续时间，以研究高层建筑在风作用下的行为，这对于评估基于性能的设计是必不可少的。

The continuing growth of tall building construction in Ontario and Canada has increased the need for sustainable urban habitats. Currently, most tall buildings are designed utilizing "specification-based" design method that adheres to construction norms and standards. Although the current "specification-based" design method is easier for application, several studies have highlighted its real-world limitations. Over the past few decades, the Performance-Based Design (PBD) approach has been successfully implemented in seismic design, where the structural system of a building is required to provide the intended performance instead of overtly prescribing how to construct it. However, this is not the case for wind design, which is essential for tall buildings. In collaboration with the industrial partner (i.e., Entuitive), this research project investigates the non-linear behavior of tall buildings under wind actions, which is essential to achieve the performance-based wind design of tall buildings.This will be achieved in 3 milestones as follows: (i) a detailed climate analysis will be conducted for major cities in Ontario, to address the joint probability of high wind speeds and durations, which is essential to identify the length of potential wind storms, (ii) an aerodynamic database will be developed through several wind tunnel pressure tests on typical high rise building shapes, and (iii) structural non-linear dynamic analysis will be conducted using the aerodynamic database in milestone ii considering the storm durations obtained from milestone i to investigate the behavior of tall buildings under wind actions, which is essential to assess the performance based design.