An Analytical Model for FRP Retrofit Sysytems Applied to Unreinforced Masonry Buildings

摘要总的目标是建立一个受准静态侧向力和重力载荷联合作用的无筋砌体（URM）建筑模型的分析模型。1994年的北岭地震提供了一个需要进行此类研究的案例研究，在此期间，大量未翻新的URM建筑物遭到破坏。然而，改造后的URM建筑表现得更好，对这些结构的破坏也不那么灾难性。该研究将通过开发简化的基于系统的分析工具来研究复合材料在修复和/或改造砖石建筑中的有效性，从而增强现有的知识体系。基于先前和拟议的实验结果，本研究将允许对未加筋和frp加筋砌体建筑作为系统的行为进行广泛和具体的调查，并将补充和扩展当前来自建筑构件实验和分析研究的研究数据。为完成项目目标，本署将执行以下工作：利用市面上可买到的电脑软件，发展分析模型，以分析URM建筑系统；对选定的建筑系统进行实验研究，以验证URM模型的准确性；对关键frp - urm材料性能进行小部件实验研究，生成分析模型所需的缺失数据；扩展分析模型，纳入新的FRP-URM材料性能，从小部件测试；对选定的建筑系统进行实验调查，以验证FRP-URM模型的准确性；并根据验证试验的结果对模型进行校正。提议的活动所产生的更广泛的影响包括工程新生的参与，利用这个项目来帮助他们发展批判性思维和解决问题的能力。此外，土木工程专业的大四学生将参与该项目，并将有机会强调工程系统，研究对设计和技术的影响，以及多学科设计的重要性。此外，北卡罗莱纳州A & &；州立大学的非博士的参与。授予HBCU 90%以上的学生是非裔美国人，将为这个项目中代表性不足的学生提供一个独特的机会。

AbstractThe general objective is to develop an analytical model for unreinforcedmasonry (URM) building models subjected to quasi-static lateral forces in combination with gravityloads. A case study of the need for such research is presented by the 1994 Northridge earthquake during which,a large number of unretrofitted URM buildings have been damaged. Retrofitted URM buildings however,performed much better, and the damage to these structures was less catastrophic. The research will enhance the existing body of knowledge by developing simplified system-based analyticaltools for investigating the effectiveness of composite materials in repairing and/or retrofitting masonrybuildings. Based on results from previous and proposed experimental results, this research will permit awide range of both broad and specific investigations on the behavior of unreinforced and FRP-reinforcedmasonry buildings as systems, and will compliment and expand the current research data fromexperimental and analytical studies on building components. To accomplish the project objectives, the followingtasks will be crried out: develop an analytical model using commercially available computer softwarepackages to analyze URM building systems; conduct experimental investigations of selected buildingsystems to validate URM model accuracy; conduct small component experimental investigations on keyFRP-URM material properties to generate missing data needed for the analytical model; expand theanalytical model to incorporate the new FRP-URM material properties derived from small componenttests; conduct experimental investigations of selected building systems to validate FRP-URM modelaccuracy; and calibrate the model based on the results of the validation tests.The broader impact resulting from the proposed activity includes the involvement of freshmenengineering students to use this project to assist them in the development of their critical thinking andproblem solving skills. Furthermore, Civil Engineering seniors will participate in the project and willhave an opportunity to emphasize engineering systems, the impact of research on design and technology,and the importance of multi-disciplinary design. In addition, the participation of North Carolina A & TState University, a non-Ph.D. granting HBCU with a 90%+ student population that is African American,will provide a unique opportunity for involvement of under-represented students in this project.