基于碰撞作用的大跨径斜拉桥地震响应分析
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摘要
地震作用下,引桥与斜拉桥一旦发生碰撞,会增大斜拉桥的损伤风险。为了研究结构碰撞效应下大跨径斜拉桥主桥和引桥的地震响应问题,以1座典型半漂浮大跨径斜拉桥为例,采用Midas Civil大型有限元分析程序建立结构动力计算模型,基于动力时程分析法进行分析。结果表明:考虑单边碰撞时,主引桥基本周期接近时,碰撞力较小,单边碰撞会减小主桥梁端位移,增大引桥梁端和主塔塔顶位移,且单边碰撞效应大于双边碰撞,单边碰撞更大地影响与其相连的引桥。
The pounding damage at expansion joints of cable-stayed bridge during earthquakes would increase the risk of cable-stayed bridge. In order to study the pounding effects of adjacent girders at expansion joints on seismic responses of main bridge and approach bridges,this research was focused on a cable-stayed bridge. Midas civil was adopted to establish structural dynamic calculation model. Combining with dynamic time history analysis method,this research shows that considering the one sided pounding,the basic cycle of the main bridge and the bridge is close,the collision force is small,the displacement of the main bridge will reduce and the displacement of the bridge beam and the main tower increase when considering the one sided pounding,and the one sided pounding's effect is greater than the two sided pounding. The one sided pounding has a greater impact on the bridge connected to it.
The pounding damage at expansion joints of cable-stayed bridge during earthquakes would increase the risk of cable-stayed bridge. In order to study the pounding effects of adjacent girders at expansion joints on seismic responses of main bridge and approach bridges,this research was focused on a cable-stayed bridge. Midas civil was adopted to establish structural dynamic calculation model. Combining with dynamic time history analysis method,this research shows that considering the one sided pounding,the basic cycle of the main bridge and the bridge is close,the collision force is small,the displacement of the main bridge will reduce and the displacement of the bridge beam and the main tower increase when considering the one sided pounding,and the one sided pounding's effect is greater than the two sided pounding. The one sided pounding has a greater impact on the bridge connected to it.
引文
郭维,沈映红.2002.高架简支梁桥非线性碰撞地震反应分析[J].地震工程与工程振动,22(4):108-113.
李建中,范立础.2005.非规则梁桥纵向地震反应及碰撞效应[J].土木工程学报,13(1):84-90.
王斌斌,叶爱君.2010.地震作用下大跨度斜拉桥和引桥间碰撞分析[J].振动与冲击,29(3):95-99.
王东升,冯启民,王国新,等.2004a.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,21(2):157-166.
王东升,王国新,冯启民,等.2004b.桥梁结构地震反应邻梁碰撞分析等效刚体模型[J].工程力学,21(2):81-85.
徐略勤,魏晓龙.2017.地震作用下双薄壁高墩刚构桥桥台处的碰撞效应及减碰措施[J].地震工程学报,39(3):425-433.
许祥,鞠三,刘伟庆,等.2013.桥梁结构地震碰撞分析模型的碰撞刚度计算方法研究[J].振动与冲击,32(12):31-39.
薛成凤,刘来君,武芳文.2017.大跨度混凝土斜拉桥横向地震作用易损性分析[J].地震研究,40(1):65-69.
杨草方.2016.考虑碰撞作用的大跨斜拉桥地震响应分析[D].西安:长安大学.
张文学,鲍艳,王景景.2012.伸缩缝间隙及纵向阻尼器对斜拉桥的碰撞影响[J].公路交通科技,29(8):60-63.
张文学,吴海军,陈士通,等.2013.橡胶缓冲装置对斜拉桥及引桥碰撞影响研究[J].振动与冲击,32(7):151-154.
Jankowski R,Wilde K,Fujino Y.1998.Pounding of superstructure in elevated bridge during earthquakes[J].Earthquake Engineering and Structural Dynamics,27(5):487-502.
Jankowski R,Wilde K,Fujino Y.2000.Reduction of pounding effects in elevated bridges during earthquakes[J].Earthquake Engineering and Structural Dynamics,29(2):195-212.
Malhotra P K.1998.Dynamics of seismic pounding at expansion joints of concrete bridges[J].Journal of Engineering Mechanics,124(7):794-802.
Reginald D,Susendar M.2002.Effect of pounding and restrainers on seismic response of multipule 2 frame bridges[J].Journal of Structural Engineering,128(7):860-869.
Sang-Hyo K,Sang-Woo L,Jeong-Hun W,et al.2000.Dynamic behaviors of bridges under seismic excitations with pounding between adjacent girders.[J].Earthquake Engineering and Structural Dynamics,26(2):1815.
李建中,范立础.2005.非规则梁桥纵向地震反应及碰撞效应[J].土木工程学报,13(1):84-90.
王斌斌,叶爱君.2010.地震作用下大跨度斜拉桥和引桥间碰撞分析[J].振动与冲击,29(3):95-99.
王东升,冯启民,王国新,等.2004a.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,21(2):157-166.
王东升,王国新,冯启民,等.2004b.桥梁结构地震反应邻梁碰撞分析等效刚体模型[J].工程力学,21(2):81-85.
徐略勤,魏晓龙.2017.地震作用下双薄壁高墩刚构桥桥台处的碰撞效应及减碰措施[J].地震工程学报,39(3):425-433.
许祥,鞠三,刘伟庆,等.2013.桥梁结构地震碰撞分析模型的碰撞刚度计算方法研究[J].振动与冲击,32(12):31-39.
薛成凤,刘来君,武芳文.2017.大跨度混凝土斜拉桥横向地震作用易损性分析[J].地震研究,40(1):65-69.
杨草方.2016.考虑碰撞作用的大跨斜拉桥地震响应分析[D].西安:长安大学.
张文学,鲍艳,王景景.2012.伸缩缝间隙及纵向阻尼器对斜拉桥的碰撞影响[J].公路交通科技,29(8):60-63.
张文学,吴海军,陈士通,等.2013.橡胶缓冲装置对斜拉桥及引桥碰撞影响研究[J].振动与冲击,32(7):151-154.
Jankowski R,Wilde K,Fujino Y.1998.Pounding of superstructure in elevated bridge during earthquakes[J].Earthquake Engineering and Structural Dynamics,27(5):487-502.
Jankowski R,Wilde K,Fujino Y.2000.Reduction of pounding effects in elevated bridges during earthquakes[J].Earthquake Engineering and Structural Dynamics,29(2):195-212.
Malhotra P K.1998.Dynamics of seismic pounding at expansion joints of concrete bridges[J].Journal of Engineering Mechanics,124(7):794-802.
Reginald D,Susendar M.2002.Effect of pounding and restrainers on seismic response of multipule 2 frame bridges[J].Journal of Structural Engineering,128(7):860-869.
Sang-Hyo K,Sang-Woo L,Jeong-Hun W,et al.2000.Dynamic behaviors of bridges under seismic excitations with pounding between adjacent girders.[J].Earthquake Engineering and Structural Dynamics,26(2):1815.