The Transverse Response of Masonry Walls Subjected to Strong Motion Earthquakes, Analytical Modelling, Parameter Study and Assessment of Slender Wall Design

在美国和世界范围内，砖石结构占建筑结构的很大一部分。加筋砌体以其经济、防火、建筑灵活、施工方便等明显的特点，在中、高震区的应用越来越多。砌体结构分析和设计、材料和施工技术的现状不能准确预测建筑在侧向荷载（如地震荷载）下的性能。在美国，砌体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结构及其在地震荷载下的反应。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。该研究是一项分析性的努力，旨在弥合试验与分析之间的差距，为砌体结构抗震性能的预测提供工具。该项目特别讨论了受动力运动激励的面外砌体墙的关联和分析建模。从目前的面外实验程序参数的各种组合将考虑纳入分析响应模型。这些模型构成了墙/隔膜相互作用研究和整体结构模型的组成部分。该项目是美日砌体建筑研究协调计划和砌体研究技术协调委员会计划的一部分。

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. The research is an analytical effort to bridge the gap between experiments and analyses to provide a tool for the prediction of seismic performance of masonry structures. The project in particular addresses correlation and analytical modelling of out- of-plane masonry walls excited by dynamic motions. Various combinations of parameters from current out-of-plane experimental programs will be considered for incorporation into analytical response models. These models form an integral part of a wall/diaphragm interaction study and also overall structures models. This project is part of the U.S.-Japan Coordinated Program for Masonry Building Research and the Technical Coordinating Committee for Masonry Research (TCCMAR) Program.