铁路圆端空心墩拟静力试验研究
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摘要
针对圆端空心桥墩进行拟静力试验有助于了解该类桥墩的地震损伤机理,丰富铁路空心墩的抗震构造设计,进而完善铁路抗震设计理论和方法。以配箍率和轴压比为设计参数,进行5个1/6缩尺比的铁路空心墩拟静力试验,通过试验观测详细描述桥墩加载过程中的裂缝开展及损伤行为,分析桥墩的损伤机理,阐释加载过程中滞回特性的变化规律及影响因素,基于骨架曲线得到构件的最大水平抗力和位移延性系数,同时研究设计参数对构件抗震性能的影响规律,并对圆端空心墩的抗震设计提出意见和建议。
The semi-static experimental research will help us to understand the damage mechanism and update seismic detail design of round-ended hollow piers, which will also help to optimize the seismic design method of hollow piers in the current code of railway engineering. Therefore, five 1/6-scale specimens were tested by semi-static loading with lateral rebar ratio and axial compression ratio being the design parameters. The crack development and damage behaviors were investigated during the loading course. The damage mechanism of the piers was investigated in depth. The rules and effects of hysteretic curves were analyzed. The maximum lateral forces and displace ductility ratio were obtained based upon skeleton curves. The effects of the design parameters on the seismic performances of the specimens were studied at the same time. Several instructions were proposed for the seismic design of the round-ended hollow railway bridge piers.
The semi-static experimental research will help us to understand the damage mechanism and update seismic detail design of round-ended hollow piers, which will also help to optimize the seismic design method of hollow piers in the current code of railway engineering. Therefore, five 1/6-scale specimens were tested by semi-static loading with lateral rebar ratio and axial compression ratio being the design parameters. The crack development and damage behaviors were investigated during the loading course. The damage mechanism of the piers was investigated in depth. The rules and effects of hysteretic curves were analyzed. The maximum lateral forces and displace ductility ratio were obtained based upon skeleton curves. The effects of the design parameters on the seismic performances of the specimens were studied at the same time. Several instructions were proposed for the seismic design of the round-ended hollow railway bridge piers.
引文
[1]蒋丽忠,邵光强,姜静静,等.高速铁路圆端形实体桥墩抗震性能试验研究[J].土木工程学报,2013,46(3):86-95.JIANG Lizhong,SHAO Guangqiang,JIANG Jingjing,et al.Experimental study on seismic performance of solid piers with round ended cross-section in high-speed railway[J].China Civil Engineering Journal,2013,46(3):86-95.
[2]陈慧.铁路桥梁圆端形空心墩的设计[J].铁道标准设计,2009(4):77-79.CHEN Hui.Design of round-ended hollow pier of railway bridge[J].Standard Design of Railway,2009(4):77-79.
[3]GB 50111-2006(2009),铁路工程抗震设计规范[S].GB 50111-2006(2009),Seismic design code for railway engineering[S].
[4]Vassilis K,Papanikolaou,Andreas J.et al.Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers:Analysis results and discussion[J].Comput&Struct,2009,87(6):1440-1450.
[5]Yeh Y K,MO Y L,YANG C Y.Seismic performance of rectangular hollow bridge columns[J].J Struct Eng,2002,128(1):60-68.
[6]Calvi G M,Pavese A,Rasulo A,et al.Experimental and numerical studies on the seismic response of RC hollow bridge piers[J].Bull Earthq Eng,2005,3(3):267-97.
[7]Shin M,Choi Y Y,SUN C H,et al.Shear strength model for reinforced concrete rectangular hollow columns[J].Eng Struct,2013(56):958-969.
[8]宗周红,陈树辉,夏樟华.钢筋混凝土箱型高墩双向拟静力试验研究[J].防灾减灾工程学报,2010,30(4):369-374.ZONG Zhouhong,CHEN Shuhui,XIA Zhanghua.Bi-axial quasi-static testing research of high hollow reinforced concrete piers[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(4):369-374.
[9]孙治国,王东升,郭迅,等.地震作用下RC薄壁空心墩抗剪能力比较研究[J].土木工程学报,2013,46(12):81-89.SUN Zhiguo,WANG Dongsheng,GUO Xun,et al Comparative study on shear strength of RC thin-walled hollow bridge piers under seismic effect[J].China Civil Engineering Journal,2013,46(12):81-89.
[10]韩强,周雨龙,杜修力.钢筋混凝土矩形空心桥墩抗震性能[J].工程力学,2015,32(3):28-40.HAN Qiang,ZHOU Yulong,DU Xiuli.Seismic performance of reinforced concrete rectangular hollow bridge columns[J].Engineering Mechanics,2015,32(3):28-40.
[11]刘林.高墩大跨铁路桥梁抗震设计与减震控制研究[D].北京:北京交通大学,2004.LIU Lin.Seismic design and control of high pier long-span railway bridge[D].Beijing:Beijing Jiaotong University,2004.
[12]夏修身.铁路高墩抗震设计方法研究[D].兰州:兰州交通大学,2012.XIA Xiushen.Seismic design approach for high piers of railway bridge[D].Lanzhou:Lanzhou Jiaotong University,2012.
[13]蒋丽忠,邵光强,王辉,等.高速铁路圆端形空心桥墩抗震性能试验研究[J].工程力学,2014,31(3):72-82.JIANG Lizhong,SHAO Guangqiang,WANG Hui,et al.Experimental study on seismic performance of hollow piers with rounded rectangular cross section in highspeed railways[J].Engineering Mechanics,2014,31(3):72-82.
[14]Park,R.Evaluation of ductility of structures and structural assemblages from laboratory testing[J].Bulletin of the New Zealand National Society for Earthquake Engineering,1989,22(3):155-166.
[2]陈慧.铁路桥梁圆端形空心墩的设计[J].铁道标准设计,2009(4):77-79.CHEN Hui.Design of round-ended hollow pier of railway bridge[J].Standard Design of Railway,2009(4):77-79.
[3]GB 50111-2006(2009),铁路工程抗震设计规范[S].GB 50111-2006(2009),Seismic design code for railway engineering[S].
[4]Vassilis K,Papanikolaou,Andreas J.et al.Numerical study of confinement effectiveness in solid and hollow reinforced concrete bridge piers:Analysis results and discussion[J].Comput&Struct,2009,87(6):1440-1450.
[5]Yeh Y K,MO Y L,YANG C Y.Seismic performance of rectangular hollow bridge columns[J].J Struct Eng,2002,128(1):60-68.
[6]Calvi G M,Pavese A,Rasulo A,et al.Experimental and numerical studies on the seismic response of RC hollow bridge piers[J].Bull Earthq Eng,2005,3(3):267-97.
[7]Shin M,Choi Y Y,SUN C H,et al.Shear strength model for reinforced concrete rectangular hollow columns[J].Eng Struct,2013(56):958-969.
[8]宗周红,陈树辉,夏樟华.钢筋混凝土箱型高墩双向拟静力试验研究[J].防灾减灾工程学报,2010,30(4):369-374.ZONG Zhouhong,CHEN Shuhui,XIA Zhanghua.Bi-axial quasi-static testing research of high hollow reinforced concrete piers[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(4):369-374.
[9]孙治国,王东升,郭迅,等.地震作用下RC薄壁空心墩抗剪能力比较研究[J].土木工程学报,2013,46(12):81-89.SUN Zhiguo,WANG Dongsheng,GUO Xun,et al Comparative study on shear strength of RC thin-walled hollow bridge piers under seismic effect[J].China Civil Engineering Journal,2013,46(12):81-89.
[10]韩强,周雨龙,杜修力.钢筋混凝土矩形空心桥墩抗震性能[J].工程力学,2015,32(3):28-40.HAN Qiang,ZHOU Yulong,DU Xiuli.Seismic performance of reinforced concrete rectangular hollow bridge columns[J].Engineering Mechanics,2015,32(3):28-40.
[11]刘林.高墩大跨铁路桥梁抗震设计与减震控制研究[D].北京:北京交通大学,2004.LIU Lin.Seismic design and control of high pier long-span railway bridge[D].Beijing:Beijing Jiaotong University,2004.
[12]夏修身.铁路高墩抗震设计方法研究[D].兰州:兰州交通大学,2012.XIA Xiushen.Seismic design approach for high piers of railway bridge[D].Lanzhou:Lanzhou Jiaotong University,2012.
[13]蒋丽忠,邵光强,王辉,等.高速铁路圆端形空心桥墩抗震性能试验研究[J].工程力学,2014,31(3):72-82.JIANG Lizhong,SHAO Guangqiang,WANG Hui,et al.Experimental study on seismic performance of hollow piers with rounded rectangular cross section in highspeed railways[J].Engineering Mechanics,2014,31(3):72-82.
[14]Park,R.Evaluation of ductility of structures and structural assemblages from laboratory testing[J].Bulletin of the New Zealand National Society for Earthquake Engineering,1989,22(3):155-166.