钢筋钢丝网砂浆加固混凝土柱的偏压性能-结构工程专业论文.docxVIP

国家自然科学基金面上项目 钢筋钢丝网砂浆加固混凝土柱的偏压性能 姓名： 李杨洲 学号： 导师： 熊光晶 教授 系别： 汕头大学土木系 专业名称： 结构工程 申请学位： 工学硕士 答辩日期： 2011 年 5 月 31 日 General Program of Natural Science Foundation of China Behaviour of Steel Bar / Wire Mesh Mortar Strengthening Concrete Columns under Eccentric Load Dissertation for Master Degree Shantou University by Yang-Zhou Li Dissertation Supervisor: Professor Guang-jing Xiong May, 2011 汕头大学工学硕士论文 I 摘要 作为建筑的主要承力构件—柱，对其加固方法的研究具有重要的意义。而既有加固方 法有待改进，本文探讨了钢筋钢丝网（SW）砂浆加固混凝土偏压柱的方法，并进行试验 研究。采用大直径钢筋可大幅度提高被加固构件的承载力，配筋分散性优越的钢丝网砂浆 薄层既能保证与大直径钢筋很好的共同工作，又使被加固构件具有更好的延性和耐久性。 本文进行了 SW 砂浆加固柱(圆柱、方柱)的偏压性能试验研究。 1. SW 砂浆加固混凝土圆柱的小偏压试验研究 分别制作 SW 和钢筋网（S）砂浆加固混凝土圆柱共 22 根，进行了以小偏心距为影响 因素的抗压对比试验研究。结果表明，偏心距对各加固柱的极限承载力有显著影响；S 和 SW 加固法均不能有效提高小偏心受压试件的位移延性；SW 加固法极限承载力较 S 加固 法有明显提高；实测 SW 试件极限承载力显著高于既有偏压承载力公式计算值。 2. SW 砂浆加固混凝土方柱的偏压试验研究 按偏心距不同和加固方法的不同，共制作了 SW 和 S 砂浆加固混凝土方柱 16 根，进 行偏压对比试验。结果表明，偏心距对各加固柱的极限承载力有显著影响；SW 砂浆加固 混凝土方柱的承载力和延性都有了一定的提高。 关键词：钢丝网砂浆；钢筋钢丝网砂浆；偏压；承载力；延性； II Abstract As the main bearing component of building—columns, the strengthening method of column has an important significance to the research. The strengthening of existing methods needs to be improved. A method for strengthening eccentrically compressed concrete columns with steel bars /wire mesh （SW）mortar was proposed in this thesis. An experimental study was carried out.It was expected that the large diameter bars could greatly improve the bearing capacity of the columns, superior decentralized of wire mesh could guarantee a better co-work of large diameter bars and wire mesh, and also enable the strengthened columnts to have better ductility and durability. The experimental study was divided into two parts. Behaviour of SW strengthening circular columns under eccentric load. 22 circular concrete columns strengthened by SW and steer bars (S) were produced and tested under eccentric loading.The effect of the eccentricity (small) was studied. The results show that, the eccentricity has a s