基于截面纤维模型的RPC箱型桥墩抗震性能分析
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摘要
为探讨RPC箱型桥墩的延性抗震性能,采用截面纤维模型编制了压弯构件非线性分析程序,程序考虑了轴力的二阶效应,能模拟水平荷载不同的加载方向角,可对包括卸载过程在内的全过程受力性能进行分析.通过3个施加常轴力的RPC箱型桥墩水平反复加载试验结果与数值分析对比,验证了程序的准确性.在此基础上运用编制的程序分析了轴压比、纵筋率、截面长宽比和截面开孔率等参数在不同水平荷载加载方向时对RPC桥墩延性抗震性能的影响,得到了最不利水平加载方向与截面长宽比之间的关系.
To discuss the seismic behavior of RPC box piers,a nonlinear analysis program was compiled with the fiber element model by taking into account secondary effects of the axial force,in which the horizontal load under variable loading direction could be simulated and the whole loading process including the unloading could be analyzed.Based on the contrast analysis between cyclic loading test results of three RPC box piers samples under the invariable axial force and the calculation results,the precision of the program was proved.Factors affecting the seismic behavior of RPC box piers under the variable horizontal loading direction were analyzed,including axial compression ratio,reinforcement ratio,length-width ratio and opening ratio of the section,and the relationship between the most unfavorable loading direction and length-width ratio of the section was obtained.
To discuss the seismic behavior of RPC box piers,a nonlinear analysis program was compiled with the fiber element model by taking into account secondary effects of the axial force,in which the horizontal load under variable loading direction could be simulated and the whole loading process including the unloading could be analyzed.Based on the contrast analysis between cyclic loading test results of three RPC box piers samples under the invariable axial force and the calculation results,the precision of the program was proved.Factors affecting the seismic behavior of RPC box piers under the variable horizontal loading direction were analyzed,including axial compression ratio,reinforcement ratio,length-width ratio and opening ratio of the section,and the relationship between the most unfavorable loading direction and length-width ratio of the section was obtained.
引文
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[2]BONNEAU O,LACHEMI M.Mechanical properties and du-rability of two industrial reactive powder concrete[J].ACIMaterial Journal,1997,94(4):286-290.
[3]王飞,方志.大跨活性粉末混凝土连续刚构桥的性能研究[J].湖南大学学报:自然科学版,2009,36(4):6-12.WANG Fei,FAN Zhi.Performance research on long-spanRPC concrete continuous rigid frame bridge[J].Journal ofHunan University:Natural Sciences,2009,36(4):6-12.(InChinese)
[4]周轶峰,阎贵平.活性粉末混凝土预制桥墩的设计研究[J].铁道建筑,2006,12(1):6-9.ZHOU Yi-feng,YAN Gui-ping.Design and research of reac-tive powder concrete piers[J].Railway Engineering,2006,12(1):6-9.(In Chinese)
[5]许丽娜.活性粉末混凝土桥墩的地震响应分析[D].北京:北京交通大学土木建筑工程学院,2006:19-72.XU Li-na.Analysis of seismic response of reactive powderconcrete piers[D].Beijing:School of Civil Engineering,Bei-jing Jiaotong University,2006:19-72.(In Chinese)
[6]郝文秀,钟铁毅,赵冠远.活性粉末混凝土空心桥墩恢复力模型试验研究[J].铁道学报,2011,33(8):89-93.HAO Wen-xiu,ZHONG Tie-yi,ZHAO Guan-yuan.Experi-mental study on the restoring force model of reactive powderconcrete hollow piers[J].Journal of the China Railway Socie-ty,2011,33(8):89-93.(In Chinese)
[7]单波.活性粉末混凝土基本力学性能的试验与研究[D].长沙:湖南大学土木工程学院,2002:35-50.SHAN Bo.Experiment and study on mechanical performanceof RPC[D].Changsha:College of Civil Engineering,HunanUniversity,2002:35-50.(In Chinese)
[8]王诚.活性粉末混凝土箱型桥墩抗震性能试验研究[D].长沙:湖南大学土木工程学院,2010:48-50.WANG Cheng.Experimental and study on seismic perform-ance of RPC box piers[D].Changsha:College of Civil Engi-neering,Hunan University,2010:48-50.(In Chinese)
[9]原海燕,安明喆,贾方方,等.活性粉末混凝土轴拉性能试验研究[J].工程力学(增刊),2011,28(1):141-144.YUAN Hai-yan,AN Ming-zhe,JIA Fang-fang,et al.Experi-mental research on uniaxial tensile performance of reactivepowder concrete[J].Engineering Mechanics(S),2011,28(1):141-144.(In Chinese)
[10]何政,欧进萍.钢筋混凝土结构非线性分析[M].哈尔滨:哈尔滨工业大学出版社,2007.HE Zheng,OU Jin-ping.Nonlinear analysis of reinforced con-crete structure[M].Harbin:Harbin Institute of TechnologyPress,2007.(In Chinese)
[11]任亮,方志,王诚.考虑双轴水平力耦合效应的RPC箱型桥墩恢复力模型试验研究[J].地震工程与工程振动,2012,32(2):152-159.REN Liang,FANG Zhi,WANG Cheng.Experimental studyon the restoring force model of reactive powder concrete boxpiers under biaxial horizontal load[J].Journal of EarthquakeEngineering and Engineering Vibration,2012,32(2):152-159.(In Chinese)
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