ABSTRACT

This study investigates the effects of seismic damages and retrofitting on dynamic characteristics of substandard reinforced concrete buildings. Two identical 3-story buildings were constructed, one of which was retrofitted through application of carbon fiber-reinforced polymer jacketing on its columns. Ambient vibration tests were conducted at undamaged states, and after formation of damages of different extents. Test results showed that even limited reductions in vibration frequencies could indicate serious problems about structural safety. Although the vibration frequencies of both buildings were observed to be decreased with the increasing level of damage, decrease of those of the retrofitted building was lower.

摘要

本研究调查了地震破坏和改造对不合格钢筋混凝土建筑动力特性的影响。建造了两座相同的 3 层建筑，其中一座通过在其柱子上应用碳纤维增强聚合物护套进行改造。环境振动试验在未损坏状态下进行，并在不同程度的损坏形成后进行。测试结果表明，即使振动频率的有限降低也可能表明结构安全存在严重问题。尽管观察到两座建筑物的振动频率随着损坏程度的增加而降低，但改造后的建筑物的振动频率降低幅度较小。