聚丙烯纤维增强异形柱边节点的抗震性能研究
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摘要
通过3个聚丙烯纤维增强混凝土异形柱边节点和1个普通混凝土异形柱边节点的低周反复荷载试验,对比研究了聚丙烯纤维增强对混凝土异形柱节点抗震性能的影响。结果表明:采用聚丙烯纤维增强可以提高节点的开裂荷载和变形能力,减小核心区内裂缝的数量和宽度,延缓构件的刚度退化,减轻节点的累积损伤程度,有效改善节点的破坏形态,有利于节点抗震。
Based on the low cyclic loading test of three exterior joints with specially-shaped column reinforced by polypropylene fiber and a joint with specially-shaped column not reinforced,we comparatively studied the influence of fiber reinforcement on the seismic behavior of concrete joints with specially-shaped colunn.It is demonstrated that using polypropylene fiber reinforcement can increase the cracking load and improve the ability of deformation,reduce quantity and width of cracks in the core area,delay the stiffness degradation of components,reduce the damage degree of joints,and effectively improve the failure pattern of joints.It is beneficial to stiffen the earthquake-resistance of the joints.
Based on the low cyclic loading test of three exterior joints with specially-shaped column reinforced by polypropylene fiber and a joint with specially-shaped column not reinforced,we comparatively studied the influence of fiber reinforcement on the seismic behavior of concrete joints with specially-shaped colunn.It is demonstrated that using polypropylene fiber reinforcement can increase the cracking load and improve the ability of deformation,reduce quantity and width of cracks in the core area,delay the stiffness degradation of components,reduce the damage degree of joints,and effectively improve the failure pattern of joints.It is beneficial to stiffen the earthquake-resistance of the joints.
引文
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[7]刁波,李淑春,叶英华.反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究[J].建筑结构学报,2008,29(1):57-63.
[2]王军.异形柱框架结构抗震性能试验研究[D].重庆:后勤工程学院,1990.
[3]曹祖同,陈云霞,吴戈,等.钢筋混凝土异形柱框架节点强度的研究[J].建筑结构,1999(1):42-46.
[4]李中立,曹祖同,吴戈,等.钢筋混凝土异型柱框架节点试验研究[J].工程力学,1996,13(增刊):256-260.
[5]JGJ149-2006混凝土异形柱结构技术规程[S].北京:中国建筑工业出版社,2006.
[6]王铁成,张学辉,赵海龙.纤维增强混凝土异形柱框架抗震性能的试验研究[J].地震工程与工程振动,2008,28(6):178-185.
[7]刁波,李淑春,叶英华.反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究[J].建筑结构学报,2008,29(1):57-63.
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