钢骨混凝土桥墩抗撞击性能试验研究
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摘要
为研究内置钢骨对混凝土桥墩抗撞击性能的提高作用,进行3根钢骨混凝土桥墩模型和1根钢筋混凝土桥墩模型的侧向静力加载试验和水平撞击加载试验,分析桥墩模型撞击破坏形态及影响因素,研究内置不同钢骨形式对墩身应变增长、桥墩撞击开裂和撞击剪切强度的影响。运用混凝土桥墩静力抗剪强度叠加原理,合理考虑混凝土抗剪强度组成因素及材料应变率效应,采用材料撞击动强度,建立预测钢骨混凝土桥墩撞击动力抗剪强度计算公式。研究结果表明:内置角钢、槽钢、圆钢管的混凝土桥墩的撞击开裂峰值力比普通混凝土桥墩分别提高98.76%、194.22%、186.76%,其撞击破坏峰值力比普通混凝土桥墩分别提高19.82%、52.83%、46.22%,内置钢骨对混凝土桥墩抗撞击开裂能力和抗撞击强度有显著提高作用;内置槽钢和圆钢管的钢骨混凝土桥墩的撞击开裂峰值力和撞击破坏峰值力比内置角钢的钢骨混凝土桥墩分别提高48.03%、44.27%和27.55%、22.03%,属于抗撞击性能较好的钢骨混凝土桥墩;所建公式计算结果与试验结果较符合,可为钢骨混凝土桥墩抗撞击强度设计提供参考。
In order to research the action of embedded steel on improving anti-impact performance of concrete bridge piers,the transverse static load tests and the horizontal impact load tests of three steel reinforced concrete piers and one reinforced concrete pier were conducted.The factors affecting impact failure modes were analyzed.The influence of embedded steel types on the strain increase of pier body and impact crack and impact shear strength were investigated.By dint of the superposition principle of static shear strength of concrete pier,the factors of concrete shear strength and strain rate effects of materials were reasonably considered.The calculation formulas which predict impact dynamic shear strength of steel reinforced concrete piers were established by the impact dynamic strength of materials.The research results show that the impact crack peak forces of concrete piers embedding steel angle,channel steel,and circular steel tube increase by 98.76%,194.22%,and 186.76%,respectively,and the impact failure peak forces increase by19.82%,52.83%,and 46.22%,respectively,than that of concrete piers.Embedded steels have remarkably improved the anti-impact crack ability and anti-impact strength of concrete piers.Theimpact crack peak forces and impact failure peak forces of concrete piers embedding channel steel and circular steel tube increase by 48.03%,44.27%,and 27.55%,22.03%,respectively,than that of concrete piers embedding steel angle.The concrete piers embedding channel steel and circular steel tube are steel reinforced concrete piers with good anti-impact performances.The calculated results are in good agreement with experimental results,which will provide references for the anti-impact strength design of steel reinforced concrete bridge piers.
In order to research the action of embedded steel on improving anti-impact performance of concrete bridge piers,the transverse static load tests and the horizontal impact load tests of three steel reinforced concrete piers and one reinforced concrete pier were conducted.The factors affecting impact failure modes were analyzed.The influence of embedded steel types on the strain increase of pier body and impact crack and impact shear strength were investigated.By dint of the superposition principle of static shear strength of concrete pier,the factors of concrete shear strength and strain rate effects of materials were reasonably considered.The calculation formulas which predict impact dynamic shear strength of steel reinforced concrete piers were established by the impact dynamic strength of materials.The research results show that the impact crack peak forces of concrete piers embedding steel angle,channel steel,and circular steel tube increase by 98.76%,194.22%,and 186.76%,respectively,and the impact failure peak forces increase by19.82%,52.83%,and 46.22%,respectively,than that of concrete piers.Embedded steels have remarkably improved the anti-impact crack ability and anti-impact strength of concrete piers.Theimpact crack peak forces and impact failure peak forces of concrete piers embedding channel steel and circular steel tube increase by 48.03%,44.27%,and 27.55%,22.03%,respectively,than that of concrete piers embedding steel angle.The concrete piers embedding channel steel and circular steel tube are steel reinforced concrete piers with good anti-impact performances.The calculated results are in good agreement with experimental results,which will provide references for the anti-impact strength design of steel reinforced concrete bridge piers.
引文
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[14]李俊华,王新堂,薛建阳,等.型钢高强混凝土短柱的抗剪机理与抗剪承载力[J].工程力学,2008,25(4):191-199.LI Jun-hua,WANG Xin-tang,XUE Jian-yang,et al.Shear Resistance Mechanism and Shear Strength of Steel Reinforced High-strength Concrete Short Columns[J].Engineering Mechanics,2008,25(4):191-199.
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[17]薛建阳,高亮,刘祖强,等.空腹式型钢混凝土异形柱中框架拟静力试验及有限元分析[J].建筑结构学报,2012,33(8):31-40.XUE Jian-yang,GAO Liang,LIU Zu-qiang,et al.Quasi-static Test and Finite Element Analysis on Lattice Steel Reinforced Concrete Middle Frame with Special-shaped Columns[J].Journal of Building Structures,2012,33(8):31-40.
[18]张莉杰,张南,杨洋,等.钢骨混凝土桥墩斜截面抗剪承载力计算研究[J].公路工程,2015,40(2):34-39,44.ZHANG Li-jie,ZHANG Nan,YANG Yang,et al.Calculation Method Study on Shear Resistance of Steel Reinforced Concrete Bridge Pier[J].Highway Engineering,2015,40(2):34-39,44.
[19]JGJ 138—2001,型钢混凝土组合结构技术规程[S].JGJ 138—2001,Technical Specification for Steel Reinforced Concrete Composite Structures[S].
[20]CEB-FIP,Model Code 1990,Design Code[S].
[21]李新忠,魏雪英,赵均海.混凝土力学性能的应变率效应[J].长安大学学报:自然科学版,2012,32(2):82-86.LI Xin-zhong,WEI Xue-ying,ZHAO Jun-hai.Strain Rate Effect on Mechanical Properties of Concrete[J].Journal of Chang'an University:Natural Science Edition,2012,32(2):82-86.
[2]SHERIF E T,EDWARD S,PRISCILLA F.Vehicle Collision with Bridge Piers[J].Journal of Bridge Engineering,2005,10(3):345-353.
[3]THILAKARATHNA H M I,THAMBIRATNAM D P,DHANASEKAR M,et al.Numerical Simulation of Axially Loaded Concrete Columns Under Transverse Impact and Vulnerability Assessment[J].International Journal of Impact Engineering,2010,37(11):1100-1112.
[4]刘佳林,赵强,甘英,等.汽车撞击城市立交桥墩后对桥墩结构的影响[J].交通标准化,2005(8):169-171.LIU Jia-lin,ZHAO Qiang,GAN Ying,et al.Influence on the Structure of Municipal Bridge Pier Crashed by Trucks[J].Communications Standardization,2005(8):169-171.
[5]樊文才,张南,阎卫国.车桥撞击动力分析模型[J].长安大学学报:自然科学版,2011,31(6):54-59.FAN Wen-cai,ZHANG Nan,YAN Wei-guo.Calculation on Impact Force of Vehicle Collision on Bridge[J].Journal of Chang'an University:Natural Science Edition,2011,31(6):54-59.
[6]朱忠义,杨峰.绍兴曹娥江袍江大桥船桥墩撞击力分析[J].世界桥梁,2011(5):61-64.ZHU Zhong-yi,YANG Feng.Analysis of Force of Vessel Collision Against Pier of Paojiang Bridge over Caoejiang River in Shaoxing[J].World Bridge,2011(5):61-64.
[7]崔堃鹏,夏禾,夏超逸,等.汽车撞击桥墩瞬态撞击力的等效静力计算[J].振动与冲击,2014,33(4):48-53,69.CUI Kun-peng,XIA He,XIA Chao-yi,et al.Equivalent Static Force Calculation Methods for Transient Impact Force of a Vehicle in Collision with Piers[J].Journal of Vibration and Shock,2014,33(4):48-53,69.
[8]蒋东红,王连广,孙逸增,等.高强钢骨混凝土柱的抗剪承载力计算[J].东北大学学报:自然科学版,2001,22(5):561-563.JIANG Dong-hong,WANG Lian-guang,SUN Yizeng,et al.Shear Strength Calculation of Steel-reinforced High-strength Concrete Columns[J].Journal of Northeasten University:Natural Science,2001,22(5):561-563.
[9]贾金青,姜睿,厚童.钢骨超高强混凝土框架柱抗震性能的试验研究[J].土木工程学报,2006,39(8):14-18.JIA Jin-qing,JIANG Rui,HOU Tong.An Experimental Study on the Seismic Performance of Steel Reinforced Super High-strength Concrete Columns[J].China Civil Engineering Journal,2006,39(8):14-18.
[10]赵世春.空腹桁架式型钢混凝土框架柱抗震性能的试验[J].工业建筑,2007,37(2):93-95.ZHAO Shi-chun.Investigation on the Seismic Performance of Open-web Trussed Steel Reinforced Concrete Column[J].Industrial Construction,2007,37(2):93-95.
[11]周君,楼文娟,孙军华.内配圆钢管的钢骨混凝土核心柱承载性能参数分析[J].工程力学,2007,24(7):128-133.ZHOU Jun,LOU Wen-juan,SUN Jun-hua.Parameter Study on the Column Reinforced by Inner Circular Steel Tube Under Axial Force[J].Engineering Mechanics,2007,24(7):128-133.
[12]陈宗平,薛建阳,赵鸿铁,等.低周反复荷载作用下型钢混凝土异形柱的抗剪承载力分析[J].土木工程学报,2007,40(7):30-36.CHEN Zong-ping,XUE Jian-yang,ZHAO Hong-tie,et al.Analysis on the Shear Capacity of IrregularlyShaped Steel Reinforced Concrete Columns Under Cyclic Reversed Loading[J].China Civil Engineering Journal,2007,40(7):30-36.
[13]盛和太,郭彦林.CCTV新台址主楼高含钢率SRC柱承载力性能研究[J].建筑结构学报,2008,29(3):47-53.SHENG He-tai,GUO Yan-lin.Load-carrying Capacity of High Steel Ratio SRC Columns Under in New CCTV Building[J].Journal of Building Structures,2008,29(3):47-53.
[14]李俊华,王新堂,薛建阳,等.型钢高强混凝土短柱的抗剪机理与抗剪承载力[J].工程力学,2008,25(4):191-199.LI Jun-hua,WANG Xin-tang,XUE Jian-yang,et al.Shear Resistance Mechanism and Shear Strength of Steel Reinforced High-strength Concrete Short Columns[J].Engineering Mechanics,2008,25(4):191-199.
[15]伍凯,薛建阳,赵鸿铁.型钢混凝土柱受剪承载力的统一计算公式[J].世界地震工程,2010,26(3):85-90.WU Kai,XUE Jian-yang,ZHAO Hong-tie.Unified Shear Capacity Calculation of Steel Reinforced Concrete Columns[J].World Earthquake Engineering,2010,26(3):85-90.
[16]王海生,陈以一,赵宪忠,等.高含钢率钢骨混凝土柱试验和恢复力模型[J].地震工程与工程振动,2010,30(4):57-65.WANG Hai-sheng,CHEN Yi-yi,ZHAO Xian-zhong,et al.Experimental Study on SRC Columns with High Rate of Encased Steel and Their Restoring Force Model[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(4):57-65.
[17]薛建阳,高亮,刘祖强,等.空腹式型钢混凝土异形柱中框架拟静力试验及有限元分析[J].建筑结构学报,2012,33(8):31-40.XUE Jian-yang,GAO Liang,LIU Zu-qiang,et al.Quasi-static Test and Finite Element Analysis on Lattice Steel Reinforced Concrete Middle Frame with Special-shaped Columns[J].Journal of Building Structures,2012,33(8):31-40.
[18]张莉杰,张南,杨洋,等.钢骨混凝土桥墩斜截面抗剪承载力计算研究[J].公路工程,2015,40(2):34-39,44.ZHANG Li-jie,ZHANG Nan,YANG Yang,et al.Calculation Method Study on Shear Resistance of Steel Reinforced Concrete Bridge Pier[J].Highway Engineering,2015,40(2):34-39,44.
[19]JGJ 138—2001,型钢混凝土组合结构技术规程[S].JGJ 138—2001,Technical Specification for Steel Reinforced Concrete Composite Structures[S].
[20]CEB-FIP,Model Code 1990,Design Code[S].
[21]李新忠,魏雪英,赵均海.混凝土力学性能的应变率效应[J].长安大学学报:自然科学版,2012,32(2):82-86.LI Xin-zhong,WEI Xue-ying,ZHAO Jun-hai.Strain Rate Effect on Mechanical Properties of Concrete[J].Journal of Chang'an University:Natural Science Edition,2012,32(2):82-86.