模拟损伤状态下长输管道悬索跨越结构抗震性能的试验研究
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摘要
本文根据长输管道悬索跨越工程的实际使用情况,总结了其3种基本损伤模式。以1例实际长输管道悬索桥跨越工程为原型,制作了缩尺比例为1∶8的试验模型,对试验模型进行了完好状态和3种模拟损伤状态下的输入白噪声和不同强度的E l Centro波的动力性能试验。试验结果表明:管道悬索跨越结构具有很强的抗震能力,试验输入的最大横向和竖向地震反应加速度折合原型均超过0.4g,但模型构件未发生破损,结构体系保持稳定,表明完好状态和发生3种模式损伤的悬索跨越结构均具有抗御9度地震烈度而保持使用功能的能力。
Three kinds of damage states of cable-suspension structures are summed up on the basis of actual experiences.A model scaled to be one eighth of the actual cable-suspension bridge is presented,and the dynamic property tests of the model are studied in non-damage mode and three kinds of damage modes by inputting white-noise and different intensities of El Centro waves.The experimental results show that the cable-suspension structures of pipelines have strong earthquake resistant capacity.The structural systems keep running and the members of the model are not damaged,even though the maxima of longitudinal and transverse acceleration responses input by the shaking table exceed 0.4g which are input to an actual structure.It is shown that the structure could keep running in non-damage mode and three kinds of damage modes when the ground acceleration is 0.4g which corresponds to earthquake intensity Ⅸ.
Three kinds of damage states of cable-suspension structures are summed up on the basis of actual experiences.A model scaled to be one eighth of the actual cable-suspension bridge is presented,and the dynamic property tests of the model are studied in non-damage mode and three kinds of damage modes by inputting white-noise and different intensities of El Centro waves.The experimental results show that the cable-suspension structures of pipelines have strong earthquake resistant capacity.The structural systems keep running and the members of the model are not damaged,even though the maxima of longitudinal and transverse acceleration responses input by the shaking table exceed 0.4g which are input to an actual structure.It is shown that the structure could keep running in non-damage mode and three kinds of damage modes when the ground acceleration is 0.4g which corresponds to earthquake intensity Ⅸ.
引文
[1]高东方,季天晶.天然气长输管道工程建设及设计技术展望[J].油气田地面工程,2004,23(9):15~16.
[2]张陵,郭惠勇,孙清,等.长输管道抗震研究的进展与趋向[J].西安交通大学学报,2001,35(2):203~209.
[3]刘志军,倪立峰,周兴德,等.悬垂管道跨越结构地震反应分析[J].地震工程与工程振动,2004,24(5):123~126.
[4]SY/T0015.2-98,原油和天然气输送管道穿跨越工程设计规范[S].
[5]GB50011-2001,建筑抗震设计规范[S].
[6]GB50191-93,构筑物抗震设计规范[S].
[7]李忠献,编著.工程结构试验理论与技术[M].天津:天津大学出版社,2004.
[2]张陵,郭惠勇,孙清,等.长输管道抗震研究的进展与趋向[J].西安交通大学学报,2001,35(2):203~209.
[3]刘志军,倪立峰,周兴德,等.悬垂管道跨越结构地震反应分析[J].地震工程与工程振动,2004,24(5):123~126.
[4]SY/T0015.2-98,原油和天然气输送管道穿跨越工程设计规范[S].
[5]GB50011-2001,建筑抗震设计规范[S].
[6]GB50191-93,构筑物抗震设计规范[S].
[7]李忠献,编著.工程结构试验理论与技术[M].天津:天津大学出版社,2004.
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