EAPSI:Seismic Performance of Reinforced Concrete Buildings with Shear Walls

该项目将密切分析地震导致钢筋混凝土建筑完全倒塌和不可修复的破坏的结构缺陷。将特别关注使用剪力墙或可以从使用剪力墙中受益的建筑物。该项目的主要重点是详细研究导致总损失的一系列破坏，并评估增加剪力墙的经济效益。研究将在位于下赫特的GNS Science进行，在地震工程和结构响应领域的著名专家S.R.Uma博士的指导下进行。将提供深入的工程报告，重点是2010年和2011年克赖斯特彻奇地震的结构破坏细节。该项目的成果将有助于更好地识别危险建筑，提高计算机建模的准确性，并更好地了解改装危险结构的经济效益。新西兰是研究地震性能的最佳地点，因为克赖斯特彻奇地震摧毁了许多建筑，而且自那以来产生了详细的工程报告。该项目将有助于发展非线性结构分析技能和技术，以准确模拟混凝土结构的局部破坏。结构的非线性计算机模拟是一种仍在开发中的工具，工程师们可以用它来研究建筑物在动态荷载下的整体行为。在美国，非线性建模技术正被用于评估在现代建筑规范和结构分析工具之前建成的结构的地震风险。即使最近在非线性建模技术方面取得了进展，也很难准确模拟像2011年导致182人死亡的克赖斯特彻奇派恩·古尔德大楼这样的建筑的整体倒塌，因为导致全球倒塌的是大量较小的局部倒塌。了解混凝土结构的缺陷并采取措施进行改造，必须至少考虑到建筑物居住者的生命安全、建筑物功能的最小损失和经济可行性。通过提高对翻新选择和权衡的了解，该项目将为美国和世界各地识别和改进危险的RC剪力墙结构的决策提供信息。该奖项是与新西兰皇家学会合作资助的。

This project will closely analyze structural deficiencies that lead to total collapse and non-repairable damage of reinforced concrete buildings due to earthquakes. There will be specific concentration on buildings that have or can benefit from using shear walls. The main focus of this project is to study in detail the series of failures that lead to total loss, and to evaluate the economic benefits of adding shear walls. Research will be conducted at GNS Science located in Lower Hutt, under the mentorship of Dr. S.R. Uma, a renowned expert in the field of earthquake engineering and structural response. In depth engineering reports will be made available that focus on structural failure details from the 2010 and 2011 Christchurch earthquakes. The outcomes of this project will lead to improved recognition of dangerous buildings, improved accuracy of computer modeling, and greater understanding of the economic benefits of retrofitting dangerous structures. New Zealand is an optimal location to study seismic performance because of the Christchurch earthquakes which destroyed many structures and because of the detailed engineering reports that have been produced since. This project will help develop nonlinear structural analysis skill and technique to accurately simulate localized failures in concrete structures. Nonlinear computer simulation of structures is a still-developing tool for engineers to study how a building behaves as a whole under dynamic loading. In the United States, nonlinear modeling techniques are being used to evaluate the seismic risk of structures that were built before modern buildings codes and structural analysis tools. Even with recent advances in nonlinear modeling techniques, it is difficult to accurately simulate the total collapse of buildings like the Pyne Gould building in Christchurch which killed 182 people in 2011, because of the multitude of smaller local failures that lead to the global collapse. Understanding the deficiencies of concrete structures and taking steps to retrofit them must allow for, at a minimum, life-safety of building occupants, minimal loss of building functionality, and economic viability. By improving understanding of retrofit options and trade-offs, this project will inform decision-making about the identification and improvement of dangerous RC shear wall structures in the U.S. and around the world. This award is funded in collaboration with the Royal Society of New Zealand.