碳素纤维布加固铁路桥梁疲劳试验研究  

Fatigue study on the railway beam strengthened with carbon fiber reinforced plastic sheet

作　　者：张兴虎[1] 李源[1] 张保印[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2007年第4期520-523,528,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

摘　　要：对缩尺比例为1∶4的铁路用普通钢筋混凝土桥梁和预应力混凝土桥梁进行了碳素纤维布加固后的疲劳试验研究.试验表明,加固后的混凝土梁经200万次疲劳后,强度和刚度不会降低,没有发生剥落和脆断现象,完全符合铁路实用要求.通过理论分析,提出了符合铁路规范的承载力计算公式,计算值与试验值吻合较好.Concrete structure strengthened with carbon fiber reinforced plastic sheet（CFRPS） is a new retrofit method in the field of civil engineering. In this paper, the railway reinforced concrete beams and pre-stressed concrete beams with scale model 1：4 have been tested under fatigue load after they are strengthened with CFRPS. Based on the experimental results, the strengthened beam＇s strength and rigidity would not decrease after a 200 million times of fatigue load test, and the peeling and brittle rapture of sheet would not happen, which proves the reliability of the CFRPS in practice. The calculation formula of bending strength of the strengthened beam according with railway standard have been proposed, showing good agreement with experimental data.

关 键 词：碳素纤维布 加固 钢筋混凝土梁 疲劳试验 

分 类 号：TU317.1[建筑科学—结构工程]