OpenSees下CFRP加固RC框架结构静力弹塑性分析

Static elastoplastic analysis of CFRP-strengthened RC frame using OpenSees

为了研究CFRP加固高层RC框架结构的抗震性能,设计了一个10层的框架结构。采用三种不同的CFRP加固方式对其中一榀框架进行了环向加固和抗弯加固后,利用有限元软件OpenSees建立了该榀框架的数值模型,选取指数型竖向分布力模式对原始框架和加固后的框架进行了Pushover分析。分析结果表明仅采用CFRP环向加固能增强结构的延性,对结构的承载力提高不明显,同时采用环向和纵向加固方式能更好的提高结构抗震性能。

In order to study the seismic performance of high-rise RC frame structure strengthened using CFRP,a 10-story RC frame structure was designed.After one of the frames was strengthened using three different CFRP strengthening methods,the numerical model of the frame was established with OpenSees and the exponential vertical distributed force model was used to analyze the original frame and the strengthened frame by pushover.The analysis results illustrate that only the CFRP circumferential reinforcement can enhance the ductility of the structure,but the bearing capacity of the structure is not significantly improved.At the same time,the circumferential and longitudinal strengthening methods can better improve the seismic performance of the structure.