PVA-ECC加固桥墩抗震性能试验研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (14) : 92-99.

论文

PVA-ECC加固桥墩抗震性能试验研究

谷音，彭晨星

作者信息 +

Experimental study on the seismic behavior of bridge piers strengthened with PVA-ECC

GU Yin，PENG Chenxing

Author information +

文章历史 +

摘要

为增强现役桥墩的抗震能力，研究基于聚乙烯醇纤维增强水泥基复合材料(PVA-ECC)的桥墩抗震加固性能，完成了5个剪跨比为4.2的圆形桥墩试件拟静力试验。通过试件的破坏形态与抗震性能指标，分析了PVA-ECC加固桥墩抗震性能，讨论了轴压比与PVA纤维体积掺量对桥墩抗震性能的影响。试验结果表明：采用PVA-ECC材料可以明显改善桥墩的破坏形态，控制裂缝的宽度和发展，提高桥墩的损伤容限与承载能力，表现出良好的延性和耗能能力；随轴压比增大，PVA-ECC加固桥墩的承载力提高，位移延性系数与耗能能力明显降低；随PVA纤维体积掺量增大，PVA-ECC加固桥墩的滞回曲线更加饱满，有效提升了桥墩的延性与耗能能力。

Abstract

In order to improve the seismic capacity of bridge piers in service period, the seismic performances of bridge piers strengthened with polyvinyl alcohol-engineered cementitious composite (PVA-ECC) were investigated.Five circular pier specimens with a shear span ratio of 4.2 were tested by quasi-static tests.Based on the failure modes and seismic performance indicators, the seismic performances of specimens strengthened with PVA-ECC were analyzed.Furthermore, the influences of both axial compression ratio and PVA fiber volume content on the seismic performances of piers were discussed.The experimental results show that PVA-ECC obviously improves the failure modes and controls the width and development of crack.This material also enhances the damage tolerance and bearing capacity of bridge piers.Therefore, the piers perform good ductility and energy dissipation capacity.With the increase of axial compression ratio, the bearing capacity of piers strengthened with PVA-ECC is increased.However, the displacement ductility coefficient and energy dissipation capacity are obviously reduced.With the increase of PVA fiber volume content, the hysteretic curve of piers strengthened with PVA-ECC is fuller.It effectively improves the ductility and energy dissipation capacity of bridge piers.

导出引用

谷音，彭晨星. PVA-ECC加固桥墩抗震性能试验研究[J]. 振动与冲击, 2021, 40(14): 92-99

GU Yin，PENG Chenxing. Experimental study on the seismic behavior of bridge piers strengthened with PVA-ECC[J]. Journal of Vibration and Shock, 2021, 40(14): 92-99

参考文献

［1］LI V C, LEUNG C K Y.Steady-state and multiple cracking of short random fiber composites［J］.Journal of Engineering Mechanics, 1992,118(11): 2246-2264.

［2］LI V C.On engineered cementitious composites (ECC)-a review of the material and its applications［J］.Asian Journal of Applied Sciences, 2004,4(5): 133-142.

［3］LI V C, WANG S, WU C.Tensile strain-hardening behavior of polyvinyl alcohol engineered cementitious composite (PVA-ECC)［J］.ACI Material Journal, 2001,98(6): 483-492.

［4］LI V C, DHANADA K M, ANTOINE E N, et al.On the shear behavior of ECC［J］.Advance Cement Based Materials, 1994,1(3): 142-149.

［5］FISCHER G, LI V C.Effect of matrix ductility on deformation behavior of steel-reinforced ECC flexural members under reversed cyclic loading conditions［J］.Structural Journal, 2002,99(6): 781-790.

［6］张远淼，余江滔，陆洲导，等.ECC修复震损剪力墙抗震性能试验研究［J］.工程力学, 2015,32(1): 72-80.
ZHANG Yuanmiao, YU Jiangtao, LU Zhoudao, et al.Experimental test on aseismic behavior of damaged reinforced concrete shear wall repaired with ECC［J］.Engineering Mechanics, 2015,32(1): 72-80.

［7］PAN J L, MO C, CHEN J H.Seismic behaviors of steel reinforced ECC/RC composite columns under low-cyclic loading［J］.Journal of Southeast University (English Edition), 2017,33(1): 70-78.

［8］邓明科，张阳玺，胡红波.高延性混凝土加固钢筋混凝土柱抗震性能试验研究［J］.　建筑结构学报，2017,38(6):　86-94.
DENG Mingke, ZHANG Yangxi, HU Hongbo.Experimental study on seismic behavior of reinforced concrete column strengthened with high ductile concrete［J］.Journal of Building Structures, 2017,38(6): 86-94.

［9］DENG M K, ZHANG Y X.Seismic performance of high-ductile fiber-reinforced concrete short columns［J］.Advances in Civil Engineering, 2018(8): 1-11.

［10］ZHANG R, MENG Q L, SHUI Q J, et al.Cyclic response of RC composite bridge columns with precast PP-ECC jackets in the region of plastic hinges［J］.Composite Structures, 2019,221: 1-10.

［11］PAN Z F, WU C, LIU J Z, et al.Study on mechanical properties of cost-effective polyvinyl alcohol engineered cementitious composites (PVA-ECC)［J］.Construction and Building Materials, 2015,78: 397-404.

［12］QIAN S Z, ZHANG Z G.Development of engineered cementitious composites with local ingredients［J］.Journal of Southeast University, 2012,28(3): 327-330.

［13］MA H, QIAN S Z, ZHANG Z G, et al.Tailoring engineered cementitious composites with local ingredients［J］.Construction and Building Materials, 2015,101: 584-595.

［14］黄璐.增大截面法加固混凝土柱界面粘结机理与承载力研究［D］.福州: 福州大学, 2018.

［15］周长东，田腾，吕西林，等.预应力碳纤维条带加固混凝土圆墩抗震性能试验［J］．中国公路学报，2012,25(4): 57-66.
ZHOU Changdong, TIAN Teng, L Xilin, et al.Test on seismic performance of RC circular piers strengthened with pre-stressed CFRP betls［J］.China Journal of Highway and Transport, 2012,25(4): 57-66.

［16］徐聪，陈建兵，李响.CGMM加固钢筋混凝土圆柱的拟静力试验研究［J］.华东交通大学学报, 2019,36(2): 8-14.
XU Cong, CHEN Jianbing, LI Xiang.Pseudo static experiment of reinforced concrete circular columns strengthened with CGMM［J］.Journal of East China Jiaotong University, 2019,36(2): 8-14.

［17］崔海琴，贺拴海，赵小星，等.CFRP约束空心薄壁墩抗震性能试验［J］.长安大学学报(自然科学版)，2010,30(3): 53-59.
CUI Haiqin, HE Shuanhai, ZHAO Xiaoxing, et al.Experimental research on seismic behavior of hollow rectangular thin-walled pier confined with CFRP［J］.Journal of Chang’an University (Natural Science Edition), 2010,30(3): 53-59.

［18］韩强，温佳年，杜修力，等.CFRP布加固RC空心桥墩的抗震性能［J］.土木工程学报，2015,48(1): 90-100.
HAN Qiang, WEN Jianian, DU Xiuli, et al.Seismic performance of hollow bridge columns retrofitted with carbon FRP［J］.China Civil Engineering Journal, 2015,48(1): 90-100.

［19］李青宁，郑先超，颜志勇，等.高强螺旋箍筋约束混凝土柱连接抗震性能试验研究与理论分析［J］.建筑结构学报，2013,34(8): 90-99.
LI Qingning, ZHENG Xianchao, YAN Zhiyong, et al.Seismic behavior experimental study and theoretical analysis on high-strength spiral stirrups confined concrete column［J］.Journal of Building Structures, 2013,34(8): 90-99.

［20］李远瑛，张德生.高轴压比高强混凝土柱抗震性能试验研究［J］.地震工程与工程振动，2014,34(1): 172-179.
LI Yuanying, ZHANG Desheng.Test study on seismic performance of high axial compression ratio and high-strength concrete columns［J］.Earthquake Engineering and Engineering Dynamics, 2014,34(1): 172-179.

［21］孙泽阳，吴刚，吴智深，等.钢-连续纤维复合筋增强混凝土柱抗震性能试验研究［J］.土木工程学报，2011,44(11): 24-33.
SUN Zeyang, WU Gang, WU Zhishen, et al.Experimental study on seismic performance of concrete columns reinforced by steel-FRP composite bars［J］.China Civil Engineering Journal, 2011,44(11): 24-33.