圆形钢筋混凝土桥墩抗震性能(Ⅱ):试验结果评估
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摘要
根据桥墩拟静力正交试验现象及数据结果,研究了圆形钢筋混凝土桥墩的变形特征及弯曲强度特性;并对低周反复荷载作用下桥墩的位移延性、等效刚度和刚度退化性能以及极限位移状态下累积耗能能力进行了评估,综合考察了剪跨比、轴压比、纵筋率、配箍率等因素对桥墩延性性能的影响。可为桥梁的延性抗震设计提供参考。
According to the failure phenomenon and test data in the orthogonal quasi-static test,the characteristics of deformation and flexural strength of circular reinforced concrete bridge columns are studied.And the displacement ductility,effective stiffness,stiffness degradation and capacity of accumulative energy dissipation to ultimate displacement state of bridge columns subjected to low-cyclic loading have been evaluated,so as to investigate the influence of factors such as shear-span ratio,axial-load ratio,and longitudinal reinforcement ratio and spiral reinforcement ratio on ductility performance of bridge columns.Finally,some useful conclusions are found out for the ductile anti-seismic design of highway bridges.
According to the failure phenomenon and test data in the orthogonal quasi-static test,the characteristics of deformation and flexural strength of circular reinforced concrete bridge columns are studied.And the displacement ductility,effective stiffness,stiffness degradation and capacity of accumulative energy dissipation to ultimate displacement state of bridge columns subjected to low-cyclic loading have been evaluated,so as to investigate the influence of factors such as shear-span ratio,axial-load ratio,and longitudinal reinforcement ratio and spiral reinforcement ratio on ductility performance of bridge columns.Finally,some useful conclusions are found out for the ductile anti-seismic design of highway bridges.
引文
[1]李贵乾,郑罡,王军.圆形钢筋混凝土桥墩抗震性能试验评估(Ⅰ):试验设计及初步结果[J].重庆交通大学学报:自然科学版,2011,30(5):889-894,1000.LI Gui-qian,ZHENG Gang,WANG Jun.Experimental evaluationof the seismic performance of circular reinforced concrete bridge col-umns(Ⅰ):Design and result of the experiment[J].Journal ofChongqing Jiaotong University:Natural Science,2011,30(5):889-894,1000.
[2]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[3]Lehman D E,Moehle J P.Seismic performance of well-confinedconcrete bridge columns[R].California:PEER and University ofCalifornia,Berkeley,1998.
[4]Calderone A J,Lehman D E,Moehle J P.Behavior of reinforcedconcrete bridge columns having varying aspect ratios and varyinglengths of confinement[R].California:PEER and University ofCalifornia,Berkeley,2001.
[5]Mander J B,Priestley M J N,Park R.Theoretical stress-strainmodel for confined concrete[J].Journal of the Structural DivisionASCE,1988,114(8):1804-1826.
[6]Park R.Evaluation of ductility of structures and structural assem-blages from laboratory testing[J].Bulletin of the New Zealand Na-tional Society for Earthquake Engineering,1989,22(3):155-166.
[7]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[8]李贵乾.钢筋混凝土桥墩抗震性能试验研究及数值分析[D].重庆:重庆交通大学,2010.
[9]司炳君,李宏男,王东升,等.基于位移设计的钢筋混凝土桥墩抗震性能试验研究(I):拟静力试验[J].地震工程与工程振动,2008,28(1):123-129.SI Bing-jun,LI Hong-nan,WANG Dong-shen,et al.Experimentalevaluation of the seismic performance of reinforced concrete bridgepiers designed on the basis of displacement(I):Quasi-static test[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(1):123-129.
[2]JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[3]Lehman D E,Moehle J P.Seismic performance of well-confinedconcrete bridge columns[R].California:PEER and University ofCalifornia,Berkeley,1998.
[4]Calderone A J,Lehman D E,Moehle J P.Behavior of reinforcedconcrete bridge columns having varying aspect ratios and varyinglengths of confinement[R].California:PEER and University ofCalifornia,Berkeley,2001.
[5]Mander J B,Priestley M J N,Park R.Theoretical stress-strainmodel for confined concrete[J].Journal of the Structural DivisionASCE,1988,114(8):1804-1826.
[6]Park R.Evaluation of ductility of structures and structural assem-blages from laboratory testing[J].Bulletin of the New Zealand Na-tional Society for Earthquake Engineering,1989,22(3):155-166.
[7]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[8]李贵乾.钢筋混凝土桥墩抗震性能试验研究及数值分析[D].重庆:重庆交通大学,2010.
[9]司炳君,李宏男,王东升,等.基于位移设计的钢筋混凝土桥墩抗震性能试验研究(I):拟静力试验[J].地震工程与工程振动,2008,28(1):123-129.SI Bing-jun,LI Hong-nan,WANG Dong-shen,et al.Experimentalevaluation of the seismic performance of reinforced concrete bridgepiers designed on the basis of displacement(I):Quasi-static test[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(1):123-129.
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