预应力钢绞线网加固钢筋混凝土柱抗震性能试验研究  

Experimental study on seismic behavior of RC 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防灾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：《建筑结构学报》2014年第2期128-136,共9页Journal of Building Structures

摘　　要：制作了16根采用预应力钢绞线张拉锚固新技术加固的钢筋混凝土圆形截面加固柱试件和2根未加固对比柱试件,进行了不同轴压比下水平反复加载试验,研究轴压比、钢绞线间距、预应力水平对抗震加固效果的影响。试验结果表明:高轴压比加固试件较未加固对比试件屈服荷载、极限荷载、位移延性系数、累积耗能最大提高幅度分别为36%、44%、76%、62%,低轴压比加固试件较未加固对比试件相应最大提高幅度分别为36%、27%、44%、172%;随钢绞线间距的减小,加固效果大幅度提高、刚度提高、刚度退化减缓;钢绞线间距为30 mm加固试件的加固效果随预应力水平的提高变化不明显。预应力钢绞线加固钢筋混凝土柱技术是一种主动、无损高效加固技术,具有推广应用价值。Sixteen reinforced concrete （RC） circular prestressed high strength steel wire mesh were put forward to research the seismic （PSWM） with columns strengthening with an innovative new tensioning and anchor system and two strengthening effects of main experimental parameters being ratio, steel wire spacing, prestressing level of steel wire under cyclic loading and constant axial load. technique using contrast columns axial compressive Test results show that the yield load, ultimate load, ductility coefficient and cumulative dissipated energy of the high and low axial compressive ratio columns are 36% , 44%, 76% , 62% and 36%, 27%, 44%, 127% greater than those of the contrast columns respectively. With steel wire spacing decreased, seismic strengthening effect is greatly improved. The stiffness is increased and the stiffness degradation mitigated. The seismic strengthening effect of the reinforced columns with steel wire spacing technology is an active of 30 mm did not , nondestructive, change significantly with increasing of prestressing force level. The presented and efficient strengthening technique.

关 键 词：钢筋混凝土柱 预应力高强钢绞线 抗震加固 拟静力试验 恢复力模型 

分 类 号：TU378.3[建筑科学—结构工程] TU317.1