钢丝绳搭接锚固和孔道注胶锚固的性能试验
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摘要
提出预应力钢丝绳加固钢筋混凝土框架节点的加固方法,通过绳扣进行钢丝绳搭接锚固性能试验及钢丝绳孔道注胶搭接锚固的拉拔试验,验证搭接锚固方法的可行性.由试验结果分析可知,采用两端分别拧紧绳扣的方法可实现对已完成预应力张拉的钢丝绳的临时搭接锚固;采用密封孔道水平压力注胶的施工方法可保证胶体充满孔道确保施工质量;试验中采用的植筋胶对钢丝绳具有较好的锚固效果,可在较小锚固长度的情况下保证钢丝绳拉断而无明显滑移.
A new method of strengthening RC frame joint with prestressed steel wire-rope stirrups was proposed.Experiment of clamping steel wire-ropes which are prestressed with wire line hitchs and anchored wire ropes by injecting glue was conducted to show the feasibility of this reinforcement method.The results show that the lapped prestressed ropes could be temporarily anchored by tightening wire line hitchs installed at both sides of the ropes;the method of horizontal pressure injection after sealing pore channel can fill the pore with glue;the bar glue anchorage of steel wire-rope is reliable,wire ropes are broken without obvious slippage in a short anchorage length.
A new method of strengthening RC frame joint with prestressed steel wire-rope stirrups was proposed.Experiment of clamping steel wire-ropes which are prestressed with wire line hitchs and anchored wire ropes by injecting glue was conducted to show the feasibility of this reinforcement method.The results show that the lapped prestressed ropes could be temporarily anchored by tightening wire line hitchs installed at both sides of the ropes;the method of horizontal pressure injection after sealing pore channel can fill the pore with glue;the bar glue anchorage of steel wire-rope is reliable,wire ropes are broken without obvious slippage in a short anchorage length.
引文
[1]清华大学土木工程结构专家组,西南交通大学土木工程结构专家组,北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[2]GERGELY J,PANTELIDES C P.Shear strengthening of RC T-joints using CFRP composites[J].Journal of Composites for Construction,ASCE,2000,4(2):56-64.
[3]ANTONOPOULOS C P,TRIANTAFILLOU T C.Experimental investigation of FRP-strengthened RC beam-column joints[J].Journal of Composites for Construction,ASCE,2003,7(1):39-49.
[4]ADIN M A,YANKELEVSKY D Z,FARHEY D N.Cyclic behavior of epoxy repaired reinforced concrete beam-column joints[J].ACI Structural Journal,1993,90(2):170.
[5]SERGIO M,ALOCOCER J O.Strength of reinforced concrete frame connections rehabilitated by jacketing[J].Structure Journal,1993,90(3):249-261.
[6]SHANNAG M J,ALHASSAN M A.Seismic upgrade of interior beam-column sub assemblages with high-performance fiber reinforced concrete jackets[J].ACI Structural Journal,2005,102(1):131-138.
[7]郭子雄,张杰,杨勇.设置外包预应力钢板箍RC短柱抗震性能研究[J].哈尔滨工业大学学报,2006,38(1):140-144.
[8]郭子雄,吴毅彬,曾建宇.预应力钢板箍加固RC短柱抗剪承载力试验研究[J].工程力学,2010,27(3):138-144.
[9]郭子雄,曾建宇,黄群贤,等.预应力钢板箍加固RC柱轴压性能试验研究[J].建筑结构学报,2012,33(11):124-131.
[10]杨军民,郭子雄,黄群贤.预应力钢丝绳箍加固钢筋混凝土梁抗剪承载力计算方法[J].华侨大学学报:自然科学版,2011,32(4):422-426.
[2]GERGELY J,PANTELIDES C P.Shear strengthening of RC T-joints using CFRP composites[J].Journal of Composites for Construction,ASCE,2000,4(2):56-64.
[3]ANTONOPOULOS C P,TRIANTAFILLOU T C.Experimental investigation of FRP-strengthened RC beam-column joints[J].Journal of Composites for Construction,ASCE,2003,7(1):39-49.
[4]ADIN M A,YANKELEVSKY D Z,FARHEY D N.Cyclic behavior of epoxy repaired reinforced concrete beam-column joints[J].ACI Structural Journal,1993,90(2):170.
[5]SERGIO M,ALOCOCER J O.Strength of reinforced concrete frame connections rehabilitated by jacketing[J].Structure Journal,1993,90(3):249-261.
[6]SHANNAG M J,ALHASSAN M A.Seismic upgrade of interior beam-column sub assemblages with high-performance fiber reinforced concrete jackets[J].ACI Structural Journal,2005,102(1):131-138.
[7]郭子雄,张杰,杨勇.设置外包预应力钢板箍RC短柱抗震性能研究[J].哈尔滨工业大学学报,2006,38(1):140-144.
[8]郭子雄,吴毅彬,曾建宇.预应力钢板箍加固RC短柱抗剪承载力试验研究[J].工程力学,2010,27(3):138-144.
[9]郭子雄,曾建宇,黄群贤,等.预应力钢板箍加固RC柱轴压性能试验研究[J].建筑结构学报,2012,33(11):124-131.
[10]杨军民,郭子雄,黄群贤.预应力钢丝绳箍加固钢筋混凝土梁抗剪承载力计算方法[J].华侨大学学报:自然科学版,2011,32(4):422-426.
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