不同轴压比下聚丙烯纤维增强混凝土墩抗震性能试验研究
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摘要
为研究塑性铰区采用聚丙烯纤维混凝土(PP-ECC)桥墩的抗震性能,在不同轴压比(n=0.1、0.3)下对4个局部采用PP-ECC桥墩的试件进行低周反复荷载试验,分析桥墩试件的试验轴压比和PP-ECC区高度等设计参数对滞回特性、强度衰减、刚度退化、位移延性及滞回耗能等抗震性能的影响。结果表明:4个试件的破坏过程和破坏形态相似,最终破坏时纵向钢筋受压屈曲,PP-ECC保护层未剥落,核心PP-ECC保持良好;轴压比越大,强度衰减越快,刚度退化越严重,试件整体稳定性越差;PP-ECC桥墩的位移延性和极限位移转角随着轴压比的增加而降低,轴压比越小的试件变形能力越强;随着轴压比的增加,试件的耗能能力、承载能力和初始刚度都有一定的提高。
To evaluate the seismic performance of piers with polypropylene-engineered cementitious composite(PP-ECC) in the plastic hinge region, four PP-ECC piers with axial compression ratio of 0.1 and 0.3 were tested under low-cycle repeated loading. Then the impact of design parameters such as test axial compression ratio and PP-ECC zone height on hysteretic characteristics, strength attenuation, stiffness degradation, displacement ductility, hysteretic energy dissipation and other seismic performance was analyzed. The experimental results show that the failure process and modes of the four specimens are similar. During the ultimate failure phrase, the longitudinal reinforcement yields. However, the PP-ECC cover does not peel off, and the core PP-ECC still maintains in good working condition. The strength attenuation grows faster with the increase of the axial compression ratio. Greater axial compression ratio causes severe stiffness degradation and worse stability of the specimen. The displacement ductility and ultimate displacement angle decrease with the increase of axial compression ratio. The specimens with lower axial compression ratio have stronger deformability. The energy dissipation capacity, bearing capacity and initial stiffness of the specimens improve with the increase of axial compression ratio.
To evaluate the seismic performance of piers with polypropylene-engineered cementitious composite(PP-ECC) in the plastic hinge region, four PP-ECC piers with axial compression ratio of 0.1 and 0.3 were tested under low-cycle repeated loading. Then the impact of design parameters such as test axial compression ratio and PP-ECC zone height on hysteretic characteristics, strength attenuation, stiffness degradation, displacement ductility, hysteretic energy dissipation and other seismic performance was analyzed. The experimental results show that the failure process and modes of the four specimens are similar. During the ultimate failure phrase, the longitudinal reinforcement yields. However, the PP-ECC cover does not peel off, and the core PP-ECC still maintains in good working condition. The strength attenuation grows faster with the increase of the axial compression ratio. Greater axial compression ratio causes severe stiffness degradation and worse stability of the specimen. The displacement ductility and ultimate displacement angle decrease with the increase of axial compression ratio. The specimens with lower axial compression ratio have stronger deformability. The energy dissipation capacity, bearing capacity and initial stiffness of the specimens improve with the increase of axial compression ratio.
引文
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[16] 徐礼华,邓方茜,徐浩然,等.钢-聚丙烯混杂纤维混凝土柱抗震性能试验研究[J].土木工程学报,2016,49(1):3-13.XU Lihua,DENG Fangqian,XU Haoran,et al.On Seismic Behavior of Steel-polypropylene Hybrid Fiber Reinforced Concrete Columns[J].China Civil Engineering Journal,2016,49(1):3-13.
[17] 梁兴文,康力,邓明科,等.塑性铰区采用纤维增强混凝土柱抗震性能试验研究[J].建筑结构学报,2014,35(2):63-70.LIANG Xingwen,KANG Li,DENG Mingke,et al.Experimental Investigation on Seismic Behavior of Columns with Fiber-reinforced Concrete in Potential Plastic Region [J].Journal of Building Structures,2014,35(2):63-70.
[18] 鞠彦忠,阎贵平,李永哲.低配筋铁路桥墩抗震性能的试验研究[J].铁道学报,2004,26(5):91-95.JU Yanzhong,YAN Guiping,LI Yongzhe.Experimental Research on Aseismic Performance of RC Railway Piers with Low Steel Ratios[J].Journal of the China Railway Society,2004,26(5):91-95.
[19] 周威,耿相日,郑文忠.低周往复荷载下既有混凝土柱变形能力试验研究[J].土木工程学报,2018,51(1):23-31.ZHOU Wei,GENG Xiangri,ZHENG Wenzhong.Expe-riment on Drift Capacity of Existing Concrete Columns under Low Cyclic Reciprocating Loading[J].China Civil Engineering Journal,2018,51(1):23-31.
[20] 中华人民共和国住房和城乡建设部.JGJ/T 101—2015建筑抗震试验规程[S].北京:中国建筑工业出版社,2015.
[21] 郭子雄,张杰,李传林.预应力钢板箍加固高轴压比框架柱抗震性能研究[J].土木工程学报,2009,42(12):112-117.GUO Zixiong,ZHANG Jie,LI Chuanlin.Seismic Strengthening of Rectangular RC Columns Using Prestressing Steel Jackets[J].China Civil Engineering Journal,2009,42(12):112-117.
[22] 贾金青,马英超,封硕.高轴压比作用下型钢超高强混凝土框架抗震试验研究[J].湖南大学学报(自然科学版),2016,43(9):1-9.JIA Jinqing,MA Yingchao,FENG Shuo.Study of Seismic Performance of Steel Ultra High Strength Concrete Frames under the Effect of High Axial Compression Ratio[J].Journal of Hunan University(Natural Sciences),2016,43(9):1-9.
[23] 曹新明,莫志刚,任廷坚,等.超高轴压比区域约束混凝土柱抗震性能试验研究[J].建筑结构学报,2012,33(10):102-109.CAO Xinming,MO Zhigang,REN Tingjian,et al.Experimental Research on Confined Concrete Columns with Super-high Axial Compression Ratio under Cyclic Loading[J].Journal of Building Structures,2012,33(10):102-109.
[24] 宋坤,李振宝.不同加载角度与轴压比下RC短柱抗震性能试验研究[J].世界地震工程,2015,31(1):69-75.SONG Kun,LI Zhenbao.Experimental Study on Seismic Behavior of RC Short Columns under Different Loading Angle and Axial Compression Ratio[J].World Earthquake Engineering ,2015,31(1):69-75.
[25] 刘阳,郭子雄,欧阳文俊,等.核心型钢混凝土柱抗震性能及轴压比限值试验研究[J].土木工程学报,2010,43(6):57-66.LIU Yang,GUO Zixiong,OUYANG Wenjun,et al.Experimental Study of the Seismic Behavior and Axial Compression Ratio Limit of CSRC Columns[J].China Civil Engineering Journal,2010,43(6):57-66.
[26] CLOUGH R W,PENZIEN J.Dynamics of Structures[M].Berkeley:Criticare Systems Inc,2004.
[27] 赵世春,黄雄军,路湛沁.劲性钢筋混凝土柱基本抗震行为的试验研究[J].建筑结构学报,1996,17(3):43-51.ZHAO Shichun,HUANG Xiongjun,LU Zhanqin.Investigation on Aseismic Behavior of Steel Reinforced Concrete Column[J].Journal of Building Structures,1996,17(3):43-51.
[2] 伍凯,薛建阳,赵鸿铁.轴压比对SRC-RC转换柱抗震性能影响的试验研究[J].北京工业大学学报,2013,39(8):1193-1199.WU Kai,XUE Jianyang,ZHAO Hongtie.Effect of Axial Compressive Ratio on Seismic Behavior of SRC-RC Transfer Columns[J].Journal of Beijing University of Technology,2013,39(8):1193-1199.
[3] 黄小燕,李升才.高轴压比焊接环式箍筋混凝土柱抗震性能试验[J].地震工程与工程振动,2014,34(3):118-125.HUANG Xiaoyan,LI Shengcai.Experiments on Seismic Behavior of Concrete Columns with Welding Ring Stirrups under High Axial Load Ratio[J].Earthquake Engineering and Engineering Dynamics ,2014,34(3):118-125.
[4] 吕西林,张国军,陈绍林.高轴压比高强混凝土足尺框架柱抗震性能研究[J].建筑结构学报,2009,30(3):20-26.LU Xilin,ZHANG Guojun,CHEN Shaolin.Research on Seismic Behavior of Full-scale High-strength Concrete Frame Columns with High Axial Compression Ratios[J].Journal of Building Structures,2009,30(3):20-26.
[5] 韩建平,刘文林.高轴压比配筋PVA纤维增强混凝土柱抗震性能试验研究[J].工程力学,2017,34(9):193-201.HAN Jianping,LIU Wenlin.Experimental Investigation on Seismic Behavior of PVA Fiber Reinforced Concrete Columns with High Axial Compression Ratios[J].Engineering Mechanics,2017,34(9):193-201.
[6] 樊健生,施正捷,芶双科,等.钢-ECC组合梁负弯矩受弯性能试验研究[J].土木工程学报,2017,50(4):64-72.FAN Jiansheng,SHI Zhengjie,GOU Shuangke,et al.Experimental Research on Negative Bending Behavior of Steel-ECC Composite Beams[J].China Civil Engineering Journal,2017,50(4):64-72.
[7] 张锐,孟庆利,何畏,等.考虑箍筋效应的PP-ECC梁抗剪试验研究[J].中国公路学报,2017,30(12):234-241.ZHANG Rui,MENG Qingli,HE Wei,et al.Experimental Investigation on Shear Behavior of PP-ECC Beam by Considering Effect of Stirrup[J].China Journal of Highway Transport,2017,30(12):234-241.
[8] 俞家欢.超强韧性纤维混凝土的性能及应用[M].北京:中国建筑工业出版社,2012.
[9] ZHANG R,MATSUMOTO K,HIRATA T,et al.Application of PP-ECC in Beam-column Joint Connections of Rigid-framed Railway Bridges to Reduce Transverse Reinforcements[J].Engineering Structures,2015,86:146-156.
[10] ZHANG R,MATSUMOTO K,HIRATA T,et al.Shear Behavior of Polypropylene Fiber Reinforced ECC Beams with Varying Shear Reinforcement Ratios[J].Journal of JSCE,2014,2:39-53.
[11] KAWASHIMA K,ZAFRA R,SASAKI T,et al.Effect of Polypropylene Fiber Reinforced Cement Composite and Steel Fiber Reinforced Concrete for Enhancing the Seismic Performance of Bridge Columns[J].Journal of Earthquake Engineering,2011,15(8):1194-1211.
[12] BILLINGTON S L,YOON J K.Cyclic Response of Unbonded Posttensioned Precast Columns with Ductile Fiber-Reinforced Concrete[J].Journal of Bridge Engineering,2004,9(4):353-363.
[13] 汪梦甫,张旭.高轴压比下PVA-ECC柱抗震性能试验研究[J].湖南大学学报(自然科学版),2017,44(5):1-9.WANG Mengfu,ZHANG Xu.Experimental Study on Seismic Performance of PVA-ECC Columns with High Axial Load Ratio[J].Journal of Hunan University(Natural Science),2017,44(5):1-9.
[14] 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.
[15] 朱张峰,郭正兴.不同轴压比新型混合装配式混凝土剪力墙抗震性能试验研究[J].工程力学,2016,33(12):143-149.ZHU Zhangfeng,GUO Zhengxing.Experimental Research on the Seismic Performance of New Hybrid Precast Concrete Shear Walls under Various Axial Compression Ratios[J].Engineering Mechanics ,2016,33(12):143-149.
[16] 徐礼华,邓方茜,徐浩然,等.钢-聚丙烯混杂纤维混凝土柱抗震性能试验研究[J].土木工程学报,2016,49(1):3-13.XU Lihua,DENG Fangqian,XU Haoran,et al.On Seismic Behavior of Steel-polypropylene Hybrid Fiber Reinforced Concrete Columns[J].China Civil Engineering Journal,2016,49(1):3-13.
[17] 梁兴文,康力,邓明科,等.塑性铰区采用纤维增强混凝土柱抗震性能试验研究[J].建筑结构学报,2014,35(2):63-70.LIANG Xingwen,KANG Li,DENG Mingke,et al.Experimental Investigation on Seismic Behavior of Columns with Fiber-reinforced Concrete in Potential Plastic Region [J].Journal of Building Structures,2014,35(2):63-70.
[18] 鞠彦忠,阎贵平,李永哲.低配筋铁路桥墩抗震性能的试验研究[J].铁道学报,2004,26(5):91-95.JU Yanzhong,YAN Guiping,LI Yongzhe.Experimental Research on Aseismic Performance of RC Railway Piers with Low Steel Ratios[J].Journal of the China Railway Society,2004,26(5):91-95.
[19] 周威,耿相日,郑文忠.低周往复荷载下既有混凝土柱变形能力试验研究[J].土木工程学报,2018,51(1):23-31.ZHOU Wei,GENG Xiangri,ZHENG Wenzhong.Expe-riment on Drift Capacity of Existing Concrete Columns under Low Cyclic Reciprocating Loading[J].China Civil Engineering Journal,2018,51(1):23-31.
[20] 中华人民共和国住房和城乡建设部.JGJ/T 101—2015建筑抗震试验规程[S].北京:中国建筑工业出版社,2015.
[21] 郭子雄,张杰,李传林.预应力钢板箍加固高轴压比框架柱抗震性能研究[J].土木工程学报,2009,42(12):112-117.GUO Zixiong,ZHANG Jie,LI Chuanlin.Seismic Strengthening of Rectangular RC Columns Using Prestressing Steel Jackets[J].China Civil Engineering Journal,2009,42(12):112-117.
[22] 贾金青,马英超,封硕.高轴压比作用下型钢超高强混凝土框架抗震试验研究[J].湖南大学学报(自然科学版),2016,43(9):1-9.JIA Jinqing,MA Yingchao,FENG Shuo.Study of Seismic Performance of Steel Ultra High Strength Concrete Frames under the Effect of High Axial Compression Ratio[J].Journal of Hunan University(Natural Sciences),2016,43(9):1-9.
[23] 曹新明,莫志刚,任廷坚,等.超高轴压比区域约束混凝土柱抗震性能试验研究[J].建筑结构学报,2012,33(10):102-109.CAO Xinming,MO Zhigang,REN Tingjian,et al.Experimental Research on Confined Concrete Columns with Super-high Axial Compression Ratio under Cyclic Loading[J].Journal of Building Structures,2012,33(10):102-109.
[24] 宋坤,李振宝.不同加载角度与轴压比下RC短柱抗震性能试验研究[J].世界地震工程,2015,31(1):69-75.SONG Kun,LI Zhenbao.Experimental Study on Seismic Behavior of RC Short Columns under Different Loading Angle and Axial Compression Ratio[J].World Earthquake Engineering ,2015,31(1):69-75.
[25] 刘阳,郭子雄,欧阳文俊,等.核心型钢混凝土柱抗震性能及轴压比限值试验研究[J].土木工程学报,2010,43(6):57-66.LIU Yang,GUO Zixiong,OUYANG Wenjun,et al.Experimental Study of the Seismic Behavior and Axial Compression Ratio Limit of CSRC Columns[J].China Civil Engineering Journal,2010,43(6):57-66.
[26] CLOUGH R W,PENZIEN J.Dynamics of Structures[M].Berkeley:Criticare Systems Inc,2004.
[27] 赵世春,黄雄军,路湛沁.劲性钢筋混凝土柱基本抗震行为的试验研究[J].建筑结构学报,1996,17(3):43-51.ZHAO Shichun,HUANG Xiongjun,LU Zhanqin.Investigation on Aseismic Behavior of Steel Reinforced Concrete Column[J].Journal of Building Structures,1996,17(3):43-51.