In-Plane Seismic Resistance of Two-Story Concrete Masonry Walls with Openings

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。本研究将研究两层开洞混凝土砌体墙的面内抗震性能。该研究项目形成了对单层嵌板的平面调查和对三层墙和五层结构的调查之间的过渡。调查将考虑楼板与墙体接缝的影响、墙洞的影响以及楼板构件的影响。该项目主要是试验性的，试件将在实验室中建造，并在垂直和面内横向载荷的组合下进行测试。结果将作为输入，以建立材料极限状态设计方法，以抵御地震荷载。首席研究员非常有资格进行这项研究项目，机构提供了一流的设施。建议为这项为期两年的研究项目的第一年颁发奖项。该研究项目将与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)进行协调。

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 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 variable 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 will investigate the in-plane seismic resistance of two- story concrete masonry walls with openings. The research project forms a transition between in-plane investigations on single-story panels and investigations on three-story walls and on a five-story structure. The investigation will consider the effect of floor-wall joints, the effect of wall openings, and the effect of floor elements. The project is primarily experimental where the specimens will be constructed in the laboratory and tested under combinations of vertical and in-plane lateral loads. The results will be used as input to establish material limit state design methodologies to resist seismic loadings. The principal investigator is highly qualified to conduct this research project and institution provides excellent facilities. An award is recommended for the first year of this two-year research project. This research project will be coordinated with the U.S.-Japan Coordinated Program for Masonry Building Research and the Technical Coordinated Committee for Masonry Research Program (TCCMAR).