高强钢绞线网-聚合物砂浆复合面层技术加固火灾受损梁效果  

Effect of fire-damaged reinforced concrete beams strengthened with high-strength steel wire mesh and polymer mortar

作　　者：宋波[1] 黄世敏[2] 陈奇辰[1] 姚志华 姚秋来[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国建筑科学研究院工程抗震研究所,北京100013

出　　处：《北京科技大学学报》2010年第2期270-276,共7页Journal of University of Science and Technology Beijing

基　　金：建设部研究开发项目(No.05-k4-18)

摘　　要：通过对钢筋混凝土(RC)梁构件进行受损前后的受弯性能加固实验研究,分析了实验构件的破坏形态、裂缝分布、荷载-挠度曲线、钢绞线的应变曲线以及极限承载力等.研究表明,普通RC梁在一般过火条件下,其抗弯承载力和刚度有一定程度的降低,而采用高强钢绞线网-聚合物砂浆复合面层加固技术(SMPM)加固后,其加固效果显著,承载力较过火梁显著提高,可恢复到其过火前的水平.The failure modes, fracture distributions, load-deflection curves, strain curves of strands and ultimate bearing capacities of reinforced concrete （RC） beams before and after being fire-damaged were analyzed on the basis of experimental studies on the bending properties of the beams. It is shown that the flexural capacity and stiffness of the fire-damaged beam reduce in some degree. After strengthening with high-strength steel wire mesh and polymer mortar （SMPM） the bearing capacity of the fire-damaged beam increases significantly and can reach the level of the RC beam before burning.

关 键 词：钢筋混凝土梁 钢绞线网 聚合物砂浆 抗弯加固 

分 类 号：TU375.1[建筑科学—结构工程] TU317.1