预应力钢绞线超高强混凝土管桩受弯性能研究
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摘要
为解决普通预应力超高强混凝土管桩水平承载力低和变形能力差的问题,提出了预应力钢绞线超高强混凝土管桩。通过3种常用桩型6根试件的足尺受弯性能试验、有限元分析,对比了预应力钢绞线超高强混凝土管桩与普通预应力超高强混凝土管桩在抗裂性能、受弯承载力、变形能力及破坏特征等方面的差异。研究结果表明:以钢绞线替代钢棒作为主筋可以有效提高管桩受弯状态下的变形能力和承载力;预应力钢绞线超高强混凝土管桩均以受压区混凝土压碎破坏,而普通预应力超高强混凝土管桩均以预应力钢棒拉断破坏;所建立的数值模型可以合理预测管桩的受弯性能,模拟得到的桩身裂缝分布与试验结果吻合较好。
Prestressed steel strand reinforced ultra-high strength concrete pipe piles were proposed to solve the problems of low horizontal load-carrying capacity and poor deformation capacity of ordinary prestressed ultra-high strength concrete pipe piles.In the present study,the differences between prestressed steel strand reinforced ultra-high strength concrete pipe piles and ordinary prestressed ultra-high strength concrete pipe piles in anti-cracking performance,flexural capacity,deformation capacity and damage characteristics were comparatively investigated through full-scale flexural performance experiments of six specimens of three kinds of commonly-used pile types as well as corresponding finite element analysis and theoretical calculation using design formulas of the code.The results show that replacing steel bars with steel strands as the main reinforcement can effectively improve the deformation capacity and the load-carrying capacity of the pipe piles under bending conditions.The failure mode of prestressed steel strand reinforced ultra-high strength concrete pipe piles is concrete crushing in the compression zone,while for ordinary prestressed ultra-high strength concrete pipe piles,the prestressed steel bar is broken.The established numerical model can reasonably predict the flexural performance of pipe piles,and the simulated crack distribution of the pile body is in good agreement with the experimental results.
Prestressed steel strand reinforced ultra-high strength concrete pipe piles were proposed to solve the problems of low horizontal load-carrying capacity and poor deformation capacity of ordinary prestressed ultra-high strength concrete pipe piles.In the present study,the differences between prestressed steel strand reinforced ultra-high strength concrete pipe piles and ordinary prestressed ultra-high strength concrete pipe piles in anti-cracking performance,flexural capacity,deformation capacity and damage characteristics were comparatively investigated through full-scale flexural performance experiments of six specimens of three kinds of commonly-used pile types as well as corresponding finite element analysis and theoretical calculation using design formulas of the code.The results show that replacing steel bars with steel strands as the main reinforcement can effectively improve the deformation capacity and the load-carrying capacity of the pipe piles under bending conditions.The failure mode of prestressed steel strand reinforced ultra-high strength concrete pipe piles is concrete crushing in the compression zone,while for ordinary prestressed ultra-high strength concrete pipe piles,the prestressed steel bar is broken.The established numerical model can reasonably predict the flexural performance of pipe piles,and the simulated crack distribution of the pile body is in good agreement with the experimental results.
引文
[1]张忠苗,张乾青,刘俊伟,等.软土地区预应力管桩偏位处理实例分析[J].岩土工程学报,2010,32(6):975-980.(ZHANG Zhongmiao,ZHANGQianqing,LIU Junwei,et al.Treatment of sloping prestressed pipe piles in the soft soil[J].Chinese Journal of Geotechnical Engineering,2010,32(6):975-980.(in Chinese))
[2]闫瑞明,闻建军.软土地区预应力管桩断桩事故的预防与处理[J].土木工程学报,2007,40(增刊1):421-424.(YAN Ruiming,WEN Jianjun.Preventing and reinforcement of PHC pile rupture in soft soil area[J].China Civil Engineering Journal,2007,40(Suppl.1):421-424.(in Chinese))
[3]高文生,刘金砺,赵晓光,等.关于预应力混凝土管桩工程应用中的几点认识[J].岩土力学,2015,36(增刊2):610-616.(GAO Wensheng,LIU Jinli,ZHAO Xiaoguang,et al.Some understanding of prestressed concrete pipe piles in engineering application[J].Rock and Soil Mechanics,2015,36(Suppl.2):610-616.(in Chinese))
[4]张忠苗,张乾青,贺静漪,等.浙江某高层预应力管桩偏位和上浮处理实例分析[J].岩土力学,2010,31(9):2919-2924.(ZHANG Zhongmiao,ZHANGQianqing,HE Jingyi,et al.Example analysis of sloping and floating upward prestressed pipe pile with treatment of a high-rise building in Zhejiang province[J].Rock and Soil Mechanics,2010,31(9):2919-2924.(in Chinese))
[5]陈荣保,陆瑞明.偏斜预应力管桩的承载力分析与处理[J].岩石力学与工程学报,2005,25(增刊2):3545-3551.(CHEN Rongbao,LU Ruiming.Analysis and treatment of bearing capacity of sloping prestressed pile-pipe[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Suppl.2):3545-3551.(in Chinese))
[6]刘永超.预应力混凝土管桩结构性能研究及新桩型开发[D].天津:天津大学,2009:41-49.(LIUYongchao.Research of structural performance of prestressed concrete pipe pile and development of new pile type[D].Tianjin:Tianjin University,2009:41-49.(in Chinese))
[7]张忠苗,刘俊伟,谢志专,等.新型混凝土管桩抗弯剪性能试验研究[J].岩土工程学报,2011,33(增刊2):271-277.(ZHANG Zhongmiao,LIU Junwei,XIEZhizhuan,et al.Experimental study on flexural and shearing properties of modified concrete pipe piles[J].Chinese Journal of Geotechnical Engineering,2011,33(Suppl.2):271-277.(in Chinese))
[8]张忠苗,刘俊伟,邹健,等.加强型预应力混凝土管桩抗弯剪性能试验研究[J].浙江大学学报(工学版),2011,45(6):1074-1080.(ZHANG Zhongmiao,LIU Junwei,ZOU Jian,et al.Experimental study on flexural and shearing property of reinforced prestressed concrete pipe pile[J].Journal of Zhejiang University(Engineering Science),2011,45(6):1074-1080.(in Chinese))
[9]蔡忠祥,刘陕南,高承勇,等.基于混凝土损伤模型的灌注桩水平承载性状分析[J].岩石力学与工程学报,2014,33(增刊2):4032-4040.(CAIZhongxiang,LIU Shannan,GAO Chengyong,et al.Analysis of lateral response of bored piles based on concrete damaged plasticity model[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(Suppl.2):4032-4040.(in Chinese))
[10]AKIYAMA M,ABE S,AOKI N,et al.Flexural test of precast high-strength reinforced concrete pile prestressed with unbonded bars arranged at the center of the cross-section[J].Engineering Structures,2012,34:259-270.
[11]AKDAG C T,ZDEN G.Nonlinear behavior of reinforced concrete(RC)and steel fiber added RC(WS-SFRC)model piles in medium dense sand[J].Construction and Building Materials,2013,48:464-472.
[12]徐铨彪,陈刚,贺景峰,等.复合配筋混凝土预制方桩抗弯性能试验[J].浙江大学学报(工学版),2016,50(9):1768-1776.(XU Quanbiao,CHENGang,HE Jingfeng,et al.Flexural performance experiment of composite reinforcement concrete prefabricated square piles[J].Journal of Zhejiang University(Engineering Science),2016,50(9):1768-1776.(in Chinese))
[13]徐铨彪,杨帆,陈刚,等.复合配筋混凝土预制方桩受弯性能有限元分析[J].建筑结构学报,2018,39(增刊1):347-355.(XU Quanbiao,YANG Fan,CHENGang,et al.Finite element analysis of flexural performance of composite reinforced concrete prefabricated square piles[J].Journal of Building Structures,2018,39(Suppl.1):347-355.(in Chinese))
[14]徐铨彪,陈刚,贺景峰,等.复合配筋混凝土预制方桩接头抗弯性能试验[J].浙江大学学报(工学版),2017,51(7):1300-1308.(XU Quanbiao,CHENGang,HE Jingfeng,et al.Flexural performance experiment of connection joint for composite reinforcement concrete prefabricated square piles[J].Journal of Zhejiang University(Engineering Science),2017,51(7):1300-1308.(in Chinese))
[15]俞向阳.将钢绞线安装于端板上的安装套件及安装方法:CN201610021502.1[P].2016-05-04.(YUXiangyang.Installation kit and installation method for installing steel strands on end plates:CN201610021502.1[P].2016-05-04.(in Chinese))
[16]俞向阳.用于制造具有钢绞线的混凝土桩的张拉装置:CN201410503074.7[P].2015-02-11.(YU Xiangyang.Tensioning device for manufacturing concrete piles with steel strands:CN201410503074.7[P].2015-02-11.(in Chinese))
[17]俞晓东.用于制造钢绞线钢筋笼的固定装置及制造设备和制造方法:CN201610020291.X[P].2016-04-06.(YU Xiaodong.Fixed device,manufacturing equipment and manufacturing methods for manufacturing steel strand and reinforced bar cages:CN201610020291.X[P].2016-04-06.(in Chinese))
[18]GAN G,YU X,ZENG K.Pre-tensioned centrifugal concrete pile provided with steel strands:US9783987(B2)[P].2017-10-10.
[19]柯晓军.新型高强混凝土组合柱抗震性能及设计方法研究[D].西安:西安建筑科技大学,2014:20-28.(KE Xiaojun.Study on seismic performance and design method of new high-strength concrete composite columns[D].Xi’an:Xi’an University of Architecture and Technology,2014:20-28.(in Chinese))
[20]先张法预应力混凝土管桩:GB 13476-2009[S].北京:中国标准出版社,2009.(Pretensioned spun concrete piles:GB 13476-2009[S].Beijing:China Standard Press,2009.(in Chinese))
[21]预应力混凝土管桩:10G409[S].北京:中国计划出版社,2010.(Prestressed concrete pipe pile:10G409[S].Beijing:China Planning Press,2010.(in Chinese))
[22]AN C,CASTELLO X,DUAN M,et al.Ultimate strength behaviour of sandwich pipes filled with steel fiber reinforced concrete[J].Ocean Engineering,2012,55:125-135.
[23]MAHDI N,ABOLGHASEM S,JABER G,et al.Stressstrain behavior of freshly compressed concrete under axial compression with a practical equation[J].Construction and Building Materials,2016,115:402-423.
[24]WEE T H,CHIN M S,MANSUR M A.Stress-strain relationship of high-strength concrete in compression[J].Journal of Materials in Civil Engineering,1996,8(2):70-76.
[25]李惠.高强混凝土及其组合结构[M].北京:科学出版社,2004:38-40.
[26]ESMAEILY A,XIAO Y.Behavior of reinforced concrete columns under variable axial loads analysis[J].ACIStructural Journal,2005,102(5):736-744.
[27]MERCAN B,SCHULTZ A E,STOLARSKI H K.Finite element modeling of prestressed concrete spandrel beams[J].Engineering Structures,2010,32(9):2804-2813.
[28]GENIKOMSOU A S,POLAK M A.Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS[J].Engineering Structures,2015,98:38-48.
[2]闫瑞明,闻建军.软土地区预应力管桩断桩事故的预防与处理[J].土木工程学报,2007,40(增刊1):421-424.(YAN Ruiming,WEN Jianjun.Preventing and reinforcement of PHC pile rupture in soft soil area[J].China Civil Engineering Journal,2007,40(Suppl.1):421-424.(in Chinese))
[3]高文生,刘金砺,赵晓光,等.关于预应力混凝土管桩工程应用中的几点认识[J].岩土力学,2015,36(增刊2):610-616.(GAO Wensheng,LIU Jinli,ZHAO Xiaoguang,et al.Some understanding of prestressed concrete pipe piles in engineering application[J].Rock and Soil Mechanics,2015,36(Suppl.2):610-616.(in Chinese))
[4]张忠苗,张乾青,贺静漪,等.浙江某高层预应力管桩偏位和上浮处理实例分析[J].岩土力学,2010,31(9):2919-2924.(ZHANG Zhongmiao,ZHANGQianqing,HE Jingyi,et al.Example analysis of sloping and floating upward prestressed pipe pile with treatment of a high-rise building in Zhejiang province[J].Rock and Soil Mechanics,2010,31(9):2919-2924.(in Chinese))
[5]陈荣保,陆瑞明.偏斜预应力管桩的承载力分析与处理[J].岩石力学与工程学报,2005,25(增刊2):3545-3551.(CHEN Rongbao,LU Ruiming.Analysis and treatment of bearing capacity of sloping prestressed pile-pipe[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Suppl.2):3545-3551.(in Chinese))
[6]刘永超.预应力混凝土管桩结构性能研究及新桩型开发[D].天津:天津大学,2009:41-49.(LIUYongchao.Research of structural performance of prestressed concrete pipe pile and development of new pile type[D].Tianjin:Tianjin University,2009:41-49.(in Chinese))
[7]张忠苗,刘俊伟,谢志专,等.新型混凝土管桩抗弯剪性能试验研究[J].岩土工程学报,2011,33(增刊2):271-277.(ZHANG Zhongmiao,LIU Junwei,XIEZhizhuan,et al.Experimental study on flexural and shearing properties of modified concrete pipe piles[J].Chinese Journal of Geotechnical Engineering,2011,33(Suppl.2):271-277.(in Chinese))
[8]张忠苗,刘俊伟,邹健,等.加强型预应力混凝土管桩抗弯剪性能试验研究[J].浙江大学学报(工学版),2011,45(6):1074-1080.(ZHANG Zhongmiao,LIU Junwei,ZOU Jian,et al.Experimental study on flexural and shearing property of reinforced prestressed concrete pipe pile[J].Journal of Zhejiang University(Engineering Science),2011,45(6):1074-1080.(in Chinese))
[9]蔡忠祥,刘陕南,高承勇,等.基于混凝土损伤模型的灌注桩水平承载性状分析[J].岩石力学与工程学报,2014,33(增刊2):4032-4040.(CAIZhongxiang,LIU Shannan,GAO Chengyong,et al.Analysis of lateral response of bored piles based on concrete damaged plasticity model[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(Suppl.2):4032-4040.(in Chinese))
[10]AKIYAMA M,ABE S,AOKI N,et al.Flexural test of precast high-strength reinforced concrete pile prestressed with unbonded bars arranged at the center of the cross-section[J].Engineering Structures,2012,34:259-270.
[11]AKDAG C T,ZDEN G.Nonlinear behavior of reinforced concrete(RC)and steel fiber added RC(WS-SFRC)model piles in medium dense sand[J].Construction and Building Materials,2013,48:464-472.
[12]徐铨彪,陈刚,贺景峰,等.复合配筋混凝土预制方桩抗弯性能试验[J].浙江大学学报(工学版),2016,50(9):1768-1776.(XU Quanbiao,CHENGang,HE Jingfeng,et al.Flexural performance experiment of composite reinforcement concrete prefabricated square piles[J].Journal of Zhejiang University(Engineering Science),2016,50(9):1768-1776.(in Chinese))
[13]徐铨彪,杨帆,陈刚,等.复合配筋混凝土预制方桩受弯性能有限元分析[J].建筑结构学报,2018,39(增刊1):347-355.(XU Quanbiao,YANG Fan,CHENGang,et al.Finite element analysis of flexural performance of composite reinforced concrete prefabricated square piles[J].Journal of Building Structures,2018,39(Suppl.1):347-355.(in Chinese))
[14]徐铨彪,陈刚,贺景峰,等.复合配筋混凝土预制方桩接头抗弯性能试验[J].浙江大学学报(工学版),2017,51(7):1300-1308.(XU Quanbiao,CHENGang,HE Jingfeng,et al.Flexural performance experiment of connection joint for composite reinforcement concrete prefabricated square piles[J].Journal of Zhejiang University(Engineering Science),2017,51(7):1300-1308.(in Chinese))
[15]俞向阳.将钢绞线安装于端板上的安装套件及安装方法:CN201610021502.1[P].2016-05-04.(YUXiangyang.Installation kit and installation method for installing steel strands on end plates:CN201610021502.1[P].2016-05-04.(in Chinese))
[16]俞向阳.用于制造具有钢绞线的混凝土桩的张拉装置:CN201410503074.7[P].2015-02-11.(YU Xiangyang.Tensioning device for manufacturing concrete piles with steel strands:CN201410503074.7[P].2015-02-11.(in Chinese))
[17]俞晓东.用于制造钢绞线钢筋笼的固定装置及制造设备和制造方法:CN201610020291.X[P].2016-04-06.(YU Xiaodong.Fixed device,manufacturing equipment and manufacturing methods for manufacturing steel strand and reinforced bar cages:CN201610020291.X[P].2016-04-06.(in Chinese))
[18]GAN G,YU X,ZENG K.Pre-tensioned centrifugal concrete pile provided with steel strands:US9783987(B2)[P].2017-10-10.
[19]柯晓军.新型高强混凝土组合柱抗震性能及设计方法研究[D].西安:西安建筑科技大学,2014:20-28.(KE Xiaojun.Study on seismic performance and design method of new high-strength concrete composite columns[D].Xi’an:Xi’an University of Architecture and Technology,2014:20-28.(in Chinese))
[20]先张法预应力混凝土管桩:GB 13476-2009[S].北京:中国标准出版社,2009.(Pretensioned spun concrete piles:GB 13476-2009[S].Beijing:China Standard Press,2009.(in Chinese))
[21]预应力混凝土管桩:10G409[S].北京:中国计划出版社,2010.(Prestressed concrete pipe pile:10G409[S].Beijing:China Planning Press,2010.(in Chinese))
[22]AN C,CASTELLO X,DUAN M,et al.Ultimate strength behaviour of sandwich pipes filled with steel fiber reinforced concrete[J].Ocean Engineering,2012,55:125-135.
[23]MAHDI N,ABOLGHASEM S,JABER G,et al.Stressstrain behavior of freshly compressed concrete under axial compression with a practical equation[J].Construction and Building Materials,2016,115:402-423.
[24]WEE T H,CHIN M S,MANSUR M A.Stress-strain relationship of high-strength concrete in compression[J].Journal of Materials in Civil Engineering,1996,8(2):70-76.
[25]李惠.高强混凝土及其组合结构[M].北京:科学出版社,2004:38-40.
[26]ESMAEILY A,XIAO Y.Behavior of reinforced concrete columns under variable axial loads analysis[J].ACIStructural Journal,2005,102(5):736-744.
[27]MERCAN B,SCHULTZ A E,STOLARSKI H K.Finite element modeling of prestressed concrete spandrel beams[J].Engineering Structures,2010,32(9):2804-2813.
[28]GENIKOMSOU A S,POLAK M A.Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS[J].Engineering Structures,2015,98:38-48.