Response of Reinforced Masonry Building Systems

砖石建筑占美国和世界各地建筑施工的很大一部分。 钢筋砌体建筑以其经济、防火、建筑灵活性和施工方便等明显特点，在中高地震区的使用日益增多。 砌体结构分析和设计以及材料和施工技术的现状无法准确预测地震荷载等横向荷载下的建筑行为。 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、经验规则和确定允许应力值的可疑方法的混合。 砌体也是一种复杂的建筑材料，因为大量的设计和施工变量会影响最终产品的配置及其在地震荷载下的响应。 为了描述砖石建筑的地震响应，有必要开发基础知识库以确定符合安全和经济要求的基本设计方法。 该研究项目将研究具有已知力-偏转滞后的钢筋砌体建筑系统的动态响应。 它将重点关注钢筋混凝土砌体结构的软化与破坏性地震运动序列的相互依赖性。 将以四分之一的比例制造三个相同的测试结构，并承受静态和动态侧向力。 数值程序将用于帮助解释测量结果。 该研究项目的结果将通过与以前的全尺寸研究结果进行比较，用于评估比例模型在预测全尺寸钢筋砌体结构行为方面的应用。 这将影响设计实践。 首席研究员具有从事这项工作的高素质，并且该机构提供了良好的支持设施。 建议为这个为期两年的完整研究项目的第一年授予奖项。

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 influenoe 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 the dynamic response of a reinforced masonry building system with a known force-deflection hysteresis. It will focus on the interdependence of the softening of reinforced concrete masonry structures and the sequence of destructive earthquake motions. Three identical test structures will be fabricated at one-quarter scale, and subjected to static and dynamic lateral forces. Numerical procedures will be used to help interpret measurements. The results of this research project will be used to assess the use of scale models for predicting the behavior of full scale reinforced masonry structures by making comparisons with previous full scale research results. This will influence the design practice. The principal investigator is highly qualified to conduct the work and the institution provides excellent support facilities. An award is recommended for the first year of this two-year complete research project.