钢绞线网加固RC柱抗震性能影响因素分析  

Analysis of Influencing Factors of Seismic Performance of RC Columns Strengthened with Steel Wire Mesh

作　　者：黄华[1,2] 田轲[1] 史金辉[1] 刘伯权[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]长安大学公路学院,陕西西安710064

出　　处：《公路交通科技》2013年第9期43-52,共10页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(51308065);教育部高等学校博士学科点专项科研基金项目(20090205120008);中央高校基本科研业务费专项资金项目(CHD2012JC026);中国博士后科学基金项目(2012M511956);陕西省自然科学基金项目(2012JQ7024)

摘　　要：通过建立钢绞线网加固RC柱的有限元模型,分析了反复荷载作用下加固RC柱的力学性能,验证了有限元模型的正确性。再根据有限元计算得到不同情况下加固柱的滞回曲线、骨架曲线、应变曲线、刚度和延性的变化等,进一步研究了轴压比、箍筋配箍率、纵筋配筋率、混凝土强度、钢绞线数量以及偏心受压等因素对加固柱抗震性能的影响。结果表明:随着轴压比的增大,加固柱的极限承载力提高9%～17%,延性降低9%～15%;随着箍筋配箍率、纵筋配筋率、混凝土强度和钢绞线用量的增大,加固柱的极限承载力和延性提高2%～28%;随着竖向压力的偏心距的增大,加固柱的箍筋和钢绞线应变发展加快,极限承载力降低2%～13%,耗能能力降低35%,柱的刚度和延性同样减小。By establishing the finite element model of RC columns strengthened with steel wire mesh, the mechanical properties under cyclic loading is analyzed, and the correctness of the finite element model is verified. The hysteretic curves, skeleton curves, strain curves, and the change of stiffness and ductility of strengthened RC columns of the columns under different strengthening conditions are calculated by FE model to research the influence of axial compression ratio, stirrup ratio, longitudinal reinforcement ratio, concrete strength, steel wire quantity and eccentric compression on the seismic behavior of the strengthened columns. The results show that （ 1 ） with the increasing of axial compression ratio, the ultimate bearing capacity of the strengthened columns increased by 9% - 17% , while the ductility reduced by 9% - 15% ; （2） with the increasing of stirrup ratio, longitudinal reinforcement ratio, concrete strength, and steel wire quantity, the ultimate bearing capacity and ductility of the strengthened columns increased by 2% - 28% ; （ 3 ） with the increasing of vertical pressure eccentricity, the stirrup and steel wire strain of the strengthened columns developed quickly, the ultimate bearing capacity reduced by 2% - 13% , their ability of energy consumption reduced by 35% , and their stiffness and ductility decreased.

关 键 词：桥梁工程 影响因素 有限元模拟 钢绞线网加固柱 抗震性能 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]