考虑剪力钉刚度折减的钢板组合梁概率地震需求分析
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摘要
剪力钉作为钢板组合梁中主要连接构件,其连接性能决定二者的组合效应,剪力钉的刚度将影响到整个桥梁结构的动力响应。采用SAP2000建立钢板组合梁全桥抗震有限元模型,计算分析剪力钉剪切刚度对于钢板组合梁动力特性敏感性。同时进行非线性动力时程分析,并通过概率地震需求分析方法,获得剪力钉剪切刚度对支座位移、桥墩墩底弯矩、剪力钉滑移值等工程需求参数(EDP)风险曲线影响规律。
Shear nail as the main connecting component in steel-concrete composite beam,its connection performance determines the combination effect of the two. The stiffness of the shear nail will affect the dynamic response of the whole bridge structure. The seismic finite element model of the steel-concrete composite beam bridge is established by SAP2000,and the sensitivity of the shear stiffness of the shear connector to the dynamic characteristics of the steel-concrete composite beam is calculated and analyzed. At the same time,the nonlinear dynamic time history analysis is carried out,and the effect of shear stiffness on the bearing displacement,the bottom moment of pier bottom and the slip value of the shear nail( EDP) risk curve is obtained by the probabilistic seismic demand analysis method.
Shear nail as the main connecting component in steel-concrete composite beam,its connection performance determines the combination effect of the two. The stiffness of the shear nail will affect the dynamic response of the whole bridge structure. The seismic finite element model of the steel-concrete composite beam bridge is established by SAP2000,and the sensitivity of the shear stiffness of the shear connector to the dynamic characteristics of the steel-concrete composite beam is calculated and analyzed. At the same time,the nonlinear dynamic time history analysis is carried out,and the effect of shear stiffness on the bearing displacement,the bottom moment of pier bottom and the slip value of the shear nail( EDP) risk curve is obtained by the probabilistic seismic demand analysis method.
引文
[1]黄永辉,黄超凡,黄志科.剪力钉刚度对组合梁斜拉桥受力性能的影响研究[J].广州大学学报(自然科学版),2015,(4):47-52Huang Yong-hui, Huang Chao-fan, Huang Zhi-ke.Study on the effect of shear studs stiffness on the mechanical performance of composite beam cable-stayed bridge[J]. Journal of Guangzhou University(Natural Science Edition),2015,(4):47-52(in Chinese)
[2]黄侨.桥梁钢―混凝土组合结构设计原理[M].北京:人民交通出版社,2004Huang Qiao,Design principle of bridge steel concrete composite structure[M]. Beijing:China Communications Press,2004(in Chinese)
[3] Wu Y F, Griffith M C, Oehlers D J. Numerical simulation of steel plated RC columns[J]. Computers&Structures,2004,82(4-5):359-371
[4]郑舟军,童智洋.内置式钢锚箱索塔锚固区受力与参数分析[J].桥梁建设,2009,(a2):61-66Zheng Zhou-jun, Tong Zhi-yang. Mechanical and parameter analysis of cable-to-pylon anchorage zone with built-in steel anchor box[J]. Bridge Construction,2009,(a2):61-66(in Chinese)
[5]郑舟军,陈开利.混合梁斜拉桥结合段剪力钉受力机理研究[J].武汉理工大学学报(交通科学与工程版),2008,32(4):767-770Zheng Zhou-jun,Chen Kai-li. Study on mechanism of shear studs for joining section of hybrid girder cable stayed bridge[J]. Journal of Wuhan University of Technology(Transportation Science&Engineering),2008,32(4):767-770(in Chinese)
[6]赵建,郑舟军.大跨度钢—混组合梁桥剪力群钉受力分析研究[J].桥梁建设,2013,43(3):48-53Zhao Jian,Zheng Zhou-jun. Analysis and study of force conditions of group shear studs of long span steel and concrete composite girder bridge[J]. Bridge Construction,2013,43(3):48-53(in Chinese)
[7]李露露.地震作用下钢筋混凝土连续梁桥的易损性分析[D].北京:北京交通大学,2014Li Lu-lu. Seismic fragility of reinforced concrete continuous girder bridge[D]. Beijing:Beijing Jiaotong University,2014(in Chinese)
[8] Kunnath S K, Larson L, Miranda E. Modelling considerations in probabilistic performance-based seismic evaluation:case study of the I-880 viaduct[J].Earthquake Engineering&Structural Dynamics,2010,35(1):57-75
[9] Oehlers D J. The stiffness of stud shear connections in composite beams[J]. J Constr Steel Res,1 986,6(4):273-284
[10]周绪红,逯文茹,狄谨,等.钢锚箱栓钉剪力连接件群钉效应及抗剪承载力计算方法[J].中国公路学报,2014,27(12):33-45Zhou Xu-hong,Lu Wen-ru,Di Jin,et al. Group studs effect and shear strength calculation method for group studs shear connector of steel anchor box[J]. China Journal of Highway and Transport,2014,27(12):33-45(in Chinese)
[11] Okada J,Yoda T,Jean-Paul L. A study of the grouped arrangement of stud connectors on the shear strength behavior[J]. Journal of Structural Mechanics&Earthquake Engineering,2010,766(766):75S-89S
[12]陈亮,张继文,任伟新,等.桥墩地震易损性对地震波反应谱概率分布的敏感度[J].振动工程学报,2015,(4):593-600Chen Liang, Zhang Ji-wen,Ren Wei-xin,et al.Sensitivity of seismic fragility of bridge columns on probability distributions of response spectra of earthquake ground motions[J]. Journal of Vibration Engineering,2015,(4):593-600(in Chinese)
[2]黄侨.桥梁钢―混凝土组合结构设计原理[M].北京:人民交通出版社,2004Huang Qiao,Design principle of bridge steel concrete composite structure[M]. Beijing:China Communications Press,2004(in Chinese)
[3] Wu Y F, Griffith M C, Oehlers D J. Numerical simulation of steel plated RC columns[J]. Computers&Structures,2004,82(4-5):359-371
[4]郑舟军,童智洋.内置式钢锚箱索塔锚固区受力与参数分析[J].桥梁建设,2009,(a2):61-66Zheng Zhou-jun, Tong Zhi-yang. Mechanical and parameter analysis of cable-to-pylon anchorage zone with built-in steel anchor box[J]. Bridge Construction,2009,(a2):61-66(in Chinese)
[5]郑舟军,陈开利.混合梁斜拉桥结合段剪力钉受力机理研究[J].武汉理工大学学报(交通科学与工程版),2008,32(4):767-770Zheng Zhou-jun,Chen Kai-li. Study on mechanism of shear studs for joining section of hybrid girder cable stayed bridge[J]. Journal of Wuhan University of Technology(Transportation Science&Engineering),2008,32(4):767-770(in Chinese)
[6]赵建,郑舟军.大跨度钢—混组合梁桥剪力群钉受力分析研究[J].桥梁建设,2013,43(3):48-53Zhao Jian,Zheng Zhou-jun. Analysis and study of force conditions of group shear studs of long span steel and concrete composite girder bridge[J]. Bridge Construction,2013,43(3):48-53(in Chinese)
[7]李露露.地震作用下钢筋混凝土连续梁桥的易损性分析[D].北京:北京交通大学,2014Li Lu-lu. Seismic fragility of reinforced concrete continuous girder bridge[D]. Beijing:Beijing Jiaotong University,2014(in Chinese)
[8] Kunnath S K, Larson L, Miranda E. Modelling considerations in probabilistic performance-based seismic evaluation:case study of the I-880 viaduct[J].Earthquake Engineering&Structural Dynamics,2010,35(1):57-75
[9] Oehlers D J. The stiffness of stud shear connections in composite beams[J]. J Constr Steel Res,1 986,6(4):273-284
[10]周绪红,逯文茹,狄谨,等.钢锚箱栓钉剪力连接件群钉效应及抗剪承载力计算方法[J].中国公路学报,2014,27(12):33-45Zhou Xu-hong,Lu Wen-ru,Di Jin,et al. Group studs effect and shear strength calculation method for group studs shear connector of steel anchor box[J]. China Journal of Highway and Transport,2014,27(12):33-45(in Chinese)
[11] Okada J,Yoda T,Jean-Paul L. A study of the grouped arrangement of stud connectors on the shear strength behavior[J]. Journal of Structural Mechanics&Earthquake Engineering,2010,766(766):75S-89S
[12]陈亮,张继文,任伟新,等.桥墩地震易损性对地震波反应谱概率分布的敏感度[J].振动工程学报,2015,(4):593-600Chen Liang, Zhang Ji-wen,Ren Wei-xin,et al.Sensitivity of seismic fragility of bridge columns on probability distributions of response spectra of earthquake ground motions[J]. Journal of Vibration Engineering,2015,(4):593-600(in Chinese)
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