【作者】 单波； 肖岩； 黄政宇；

【Author】 Shan Bo Xiao Yan Huang Zhengyu(Civil Engineering College of Hunan University Changsha 410082)

【机构】 湖南大学土木工程学院；

【摘要】 对于大量已建的钢筋混凝土桥柱,其抗震性能往往达不到新的抗震设计规范的要求,有必要进行加固,而这些加固柱在经历地震荷载作用后的残余性能具有重要意义。本文对8根已建桥梁的钢筋混凝土模型柱进行了伪静力试验,采用了GFRP和CFRP两种材料对试验柱进行了加固,外包FRP加固层数和水平延性率是伪静力试验的主要参数,伪静力试验表明,在横向钢筋不足的情况下,外包FRP加固可有效提高试验柱的承载力和延性,并改变了结构的破坏形式。本文还对带地震损伤的模型柱进行了长期荷载试验,并对试验结果进行了分析。更多还原

【Abstract】 Residual seismic performance of reinforced concrete (RC) columns retrofitted with fiber-reinforced plastic (FRP) is a significant issue for RC bridge columns which designed based on old seismic design. In this paper, eight RC columns were tested under cyclic lateral force and a constant load equal to 20% of the column axial load capacity. The main parameters considered were the FRP jacket and drift ratio. Glass-fiber-reinforced plastic (GFRP) and Carbon-fiber-reinforced plastic (CFRP) were both used in the test. This paper discusses the main results from the pseudo-static test. The project of long-term load of test columns with simulate earthquake damage is also introduced in the paper. Observations of residual load carrying behavior of previously damaged column models are also introduced in the paper.更多还原