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

摘要本文的总体目标是建立一个分析模型，用于分析在准静态侧向力和重力荷载共同作用下的砌体结构（URM）模型。1994年北岭地震期间，大量的未经改造的URM建筑物已被损坏的案例研究，这种研究的必要性。然而，翻新的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增强现有的知识体系，以调查复合材料在修复和/或改造砖石建筑物中的有效性。基于以前的和建议的实验结果，本研究将允许广泛的广泛和具体的调查的行为，无筋和FRP-装饰砌体建筑系统，并将补充和扩大目前的研究数据从实验和分析研究的建筑构件。为实现项目目标，将开展以下工作：使用商业上可获得的计算机软件包开发分析模型，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;对关键的FRP-URM材料特性进行小部件实验研究，以生成分析模型所需的缺失数据;扩展分析模型，将新的FRP-URM材料特性从小部件试验中导出;对选定的建筑系统进行实验研究，以验证FRP-URM模型的准确性;并根据验证测试的结果校准模型。拟议活动产生的更广泛影响包括参与一年级工程系学生使用这个项目，以帮助他们在他们的批判性思维和解决问题的能力的发展。此外，土木工程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，参与北卡罗来纳州A TState大学，一个非博士。授予HBCU与90%以上的学生人口是非洲裔美国人，将提供一个独特的机会，代表性不足的学生参与这个项目。

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.