学术论文

      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

      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.
      Abstract:
      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.
      作者: 宋波 [1] 黄世敏 [2] 陈奇辰 [1] 姚志华 [2] 姚秋来 [2]
      Author: SONG Bo [1] HUANG Shi-min [2] CHEN Qi-chen [1] YAO Zhi-hua [2] YAO Qiu-lai [2]
      作者单位: 北京科技大学土木与环境工程学院,北京,100083 中国建筑科学研究院工程抗震研究所,北京,100013
      刊 名: 北京科技大学学报 ISTICEIPKU
      年,卷(期): 2010, 32(2)
      分类号: TU375.1 TU317.1
      机标分类号: TU3 TU7
      在线出版日期: 2010年4月20日
      基金项目: 建设部研究开发项目