速度锁定型减隔震支座设计与性能分析
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摘要
在长联大跨连续梁桥抗震设计中存在固定墩受力大和尺寸设计困难的问题。本文以成都—昆明铁路成都至峨眉段扩能改造工程中新青衣江特大桥的抗震问题为例,研究速度锁定型减隔震支座的设计方法与减隔震性能。抗震计算显示在小震时将桥梁活动墩变为固定墩能有效降低固定墩地震力,且大震时各墩均能起到减隔震作用,减隔震效果显著。通过抗震计算获得支座减隔震性能参数,完成支座样品的制造,进而开展减隔震性能试验。结果表明支座各项性能符合设计要求。
The problems of large force and diff icult size design of fixed piers exist in the aseismic design of long span and long unit continuous girder bridges. Taking the seismic problem of the N ew Qingyijiang bridge in the capacity expansion and transformation project from C hengdu to Emei of C hengdu-Kunming railway as an example,the design method and seismic isolation performance of the velocity-locked seismic isolation bearing were studied. The seismic calculation shows that the active pier of the bridge is transformed into fixed pier under small earthquakes to effectively reduce the seismic force of fixed pier,and all piers play the role of seismic isolation under large earthquakes,the effect of seismic isolation is remarkable.The parameters of bearing seismic isolation performance are obtained by seismic calculation. The sample of bearing is manufactured,and then the performance test of bearing seismic isolation is carried out. The test results show that the performance of the bearing meets the design requirements.
The problems of large force and diff icult size design of fixed piers exist in the aseismic design of long span and long unit continuous girder bridges. Taking the seismic problem of the N ew Qingyijiang bridge in the capacity expansion and transformation project from C hengdu to Emei of C hengdu-Kunming railway as an example,the design method and seismic isolation performance of the velocity-locked seismic isolation bearing were studied. The seismic calculation shows that the active pier of the bridge is transformed into fixed pier under small earthquakes to effectively reduce the seismic force of fixed pier,and all piers play the role of seismic isolation under large earthquakes,the effect of seismic isolation is remarkable.The parameters of bearing seismic isolation performance are obtained by seismic calculation. The sample of bearing is manufactured,and then the performance test of bearing seismic isolation is carried out. The test results show that the performance of the bearing meets the design requirements.
引文
[1]石秋君,佟嘉明,李东昇,等.新型速度锁定装置在铁路桥梁加固改造中的应用[J].铁道建筑,2015,55(10):76-79.
[2]项敬辉,冯克岩.速度锁定器在桥梁抗震中的适用性分析研究[J].城市道桥与防洪,2017,4(4):209-211.
[3]颜志华,马良喆,陈永祁.速度锁定装置在津秦客运专线减隔震设计中的应用[J].桥梁建设,2014,44(1):95-100.
[4]侯海彪,黄志毅,许明杰.成灌线连续梁速度锁定支座的设计及应用[J].价值工程,2012,31(27):136-138.
[5]郑晓龙,樊启武,金怡新,等.速度锁定支座的设计与减隔震性能分析[J].铁道工程学报,2015 10(10):73-78.
[6]刘军,陈彦北,宁响亮,等.速度锁定E型钢阻尼支座及其应用[J].铁道建筑,2013,53(3):49-52.
[7]彭天波,李建中,范立础.双曲面球型减隔震支座研发及应用[J].同济大学学报(自然科学版),2007 35(2):176-180.
[8]李侠.长联大跨连续梁桥减隔震设计方案比选[J].铁道建筑,2014,54(6):43-46.
[9]李一鸣,虞庐松,南鹏.高烈度地震区曲线连续梁桥的减隔震方案研究[J].铁道建筑,2017,57(9):43-47.
[10]余小华,窦胜谭.速度锁定器在桥梁抗震中的有限元模拟[J].铁道标准设计,2015,59(2):56-59.
[11]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.桥梁球型支座:GB/T 17955—2009[S].北京:中国质检出版社,2009.
[12]中华人民共和国交通运输部.桥梁双曲面球型减隔震支座:JT/T 927—2014[S].北京:人民交通出版社,2014.
[2]项敬辉,冯克岩.速度锁定器在桥梁抗震中的适用性分析研究[J].城市道桥与防洪,2017,4(4):209-211.
[3]颜志华,马良喆,陈永祁.速度锁定装置在津秦客运专线减隔震设计中的应用[J].桥梁建设,2014,44(1):95-100.
[4]侯海彪,黄志毅,许明杰.成灌线连续梁速度锁定支座的设计及应用[J].价值工程,2012,31(27):136-138.
[5]郑晓龙,樊启武,金怡新,等.速度锁定支座的设计与减隔震性能分析[J].铁道工程学报,2015 10(10):73-78.
[6]刘军,陈彦北,宁响亮,等.速度锁定E型钢阻尼支座及其应用[J].铁道建筑,2013,53(3):49-52.
[7]彭天波,李建中,范立础.双曲面球型减隔震支座研发及应用[J].同济大学学报(自然科学版),2007 35(2):176-180.
[8]李侠.长联大跨连续梁桥减隔震设计方案比选[J].铁道建筑,2014,54(6):43-46.
[9]李一鸣,虞庐松,南鹏.高烈度地震区曲线连续梁桥的减隔震方案研究[J].铁道建筑,2017,57(9):43-47.
[10]余小华,窦胜谭.速度锁定器在桥梁抗震中的有限元模拟[J].铁道标准设计,2015,59(2):56-59.
[11]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.桥梁球型支座:GB/T 17955—2009[S].北京:中国质检出版社,2009.
[12]中华人民共和国交通运输部.桥梁双曲面球型减隔震支座:JT/T 927—2014[S].北京:人民交通出版社,2014.