Response of Reinforced Masonry Walls to Out-of-Plane DynamicExcitation

在美国和世界范围内，砖石建筑占建筑建筑的很大一部分。由于配筋砌体结构具有明显的经济性、防火安全性、建筑灵活性和施工简便性等特点，在中高地震区的应用日益广泛。目前的砌体结构分析和设计以及材料和施工技术无法准确预测建筑物在横向荷载(如地震荷载)下的行为。在美国，砖石建筑的设计和建造方法、规范和标准依赖于工作应力方法、经验规则和确定许用应力值的可疑方法的混合。砌体也是一种复杂的建筑材料，其设计和施工变量众多，影响最终产品的构型及其在地震荷载作用下的反应。为了描述砌体建筑的地震反应，有必要建立基本的知识库，以确定符合安全和经济要求的基本设计方法。本研究项目将为描述砌体墙平面外反应的分析模型的验证提供基础数据。它的重点是加固粘土砖墙。本程序的实验部分将包括加筋粘土砌体墙在平面外荷载作用下的准静态循环试验。产生的数据将包括力-位移加载路径和滞回曲线，以及砖石和钢筋的应变数据。分析部分将利用TCCMAR方案中其他人开发的数学模型。最后的研究成果将被用于建立合理的极限状态设计方法来抵抗地震荷载。首席调查员非常有资格进行这项研究项目，该机构提供了一流的设施。建议为这项为期12个月的研究项目颁发奖项。该研究项目是美日砖石建筑研究协调计划和砖石研究技术协调委员会(TCCMAR)计划的一部分。

Masonry construction comprises a large portion of building construction in the U.S. and the world. Reinforced masonry construction use is increasing in moderate to higher seismic zones because of its apparent features of economy, fire safety, architectural flexibility and ease of construction. The present state of masonry structural analysis and design and materials and construction technologies does not enable an accurate prediction of building behavior under lateral loads such as seismic loads. In the U.S., masonry buildings are designed and built with methods, codes, and standards that rely upon a mixture of working stress methods, empirical rules, and questionable methods for determining allowable stress values. Masonry is also a complex building material because of the large number of design and construction variables which influence the final product configuration and its response under seismic loads. In order to describe the seismic response of masonry buildings it is necessary to develop the fundamental knowledge base to determine basic design methodologies consistent with safety and economic requirements. This research project will investigate and provide basic data for verification of analytical models that describe the out-of-plane response of masonry walls. It is focused on reinforced clay masonry walls. The experimental portion of this program will consist of quasi- static, cyclic testing of reinforced clay masonry walls subjected to out-of-plane loadings. The data produced will include force- displacement load paths and hysteretic loops, as well as strain data in the masonry and reinforcement. The analytical portion will utilize the mathematical models developed by others in the TCCMAR program. The final research results will then be used to establish rational limit state design methodologies to resist seismic loadings. The principal investigator is highly qualified to conduct this research project and the institution provides excellent facilities. An award is recommended for this twelve-month research project. This research project is part of the U.S.-Japan Coordinated Program for Masonry Building Research and the Technical Coordinating Committee for Masonry Research (TCCMAR) Program.