预应力钢绞线网加固混凝土圆柱的轴压性能  

AXIAL COMPRESSION PERFORMANCE OF CONCRETE COLUMNS STRENGTHENED WITH PRESTRESSED HIGH STRENGTH STEEL WIRE MESH

作　　者：郭俊平[1] 邓宗才[1] 林劲松 卢海波 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [2]北京环友建筑技术发展有限责任公司,北京100045

出　　处：《工程力学》2014年第3期129-137,共9页Engineering Mechanics

摘　　要：开发了一种预应力钢绞线(钢丝绳)网加固混凝土柱新技术,对24根预应力加固混凝土圆柱和2根未加固对比柱进行了试验,研究在单调轴向荷载作用下,钢绞线间距、预应力水平对混凝土柱加固效果的影响。试验结果表明:较对比柱,预应力加固柱的轴向峰值应力和应变最大提高幅度为83%和95%,加固效果随预应力水平的提高而提高;随钢绞线间距的减小,加固效果大幅度提高;钢绞线间距对加固效果的影响大于预应力水平的影响。建立了预应力钢绞线加固混凝土柱峰值应力和应变计算式,提出了两种应力-应变全曲线关系模型,计算结果与试验吻合良好,可为相关研究提供理论支持。预应力钢绞线网加固混凝土柱技术是一种主动、高效、无损加固新技术,具有推广和应用价值。An innovative concrete reinforcing technique of prestressed high strength steel wire （steel wire rope） mesh （PSWM） is presented. Approximate full-scale tests of 24 concrete circular columns strengthened with PSWM and 2 contrast columns were put forward to research the strengthening effects of main experimental parameters of the steel wire spacing and the prestressing level of steel wire under axial loading. The test results show that the peak stress and strain of the strengthened columns are 83% and 95% greater than those of the contrast columns. By raising the steel wire prestressing level, the reinforcing effect is improved; with steel wire spacing decreased, strengthening effect is greatly improved. The formula of peak stress ＆ strain and 2 kinds of stress-strain full curve relationship models of the columns strengthened with PSWM were proposed. The calculated results agree well with the experimental ones and a theoretical support for related research. The presented technology is an attractive, nondestructive, and efficient reinforcement technology, worthy of popularization and application.

关 键 词：预应力高强钢绞线 混凝土柱 峰值应力 峰值应变 应力-应变模型 

分 类 号：TU378.5[建筑科学—结构工程]