城市轨道交通地下结构抗震性能指标体系研究
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摘要
为了能够合理地评价城市轨道交通地下结构在地震下的损伤程度,给出了其抗震性能指标体系,包括构件的强度指标和结构的整体变形指标。构件的强度指标分为两个等级,并给出了其限值。结构的整体变形指标区分矩形截面和圆形截面,分别用层间位移角和最大直径变形率表示。通过分析地面建筑和地下建筑的异同,并统计了国内46组钢管混凝土框架和145组型钢混凝土框架的层间位移角的试验数据,得出了城市轨道交通矩形地下结构的层间位移角的不同性能下的限值。利用盾构隧道衬砌直径变形和内力的关系,通过变形协调推得直径变形率的计算公式;又通过动力增量法,分不同的场地和不同的地震波,计算得出典型盾构隧道的直径变形率,综合考虑后得出地震作用下盾构隧道直径变形率限值。
The seismic performance index system of urban mass transit underground structures is presented,which includes both intensity index of component and overall deformation index,in order to reasonably evaluate its damage degree under seismic excitations. Intensity index of component has two grades and limiting value of two grades are provided. Overall deformation index includes story drift angle for rectangular underground structures and diameter deformation rate for shield tunnels. Performance index values of urban mass transit rectangular underground structure story drift angle are put forward by reference to modified performance index values of ground structure story drift angle,which was based on a statistical analysis for experiment data of forty-six groups concrete-filled steel tubular frames and one hundred forty-five groups steel-reinforced concrete frames and took into account similarities and differences between surface structures and underground structures. Based on relation between tunnel diameter deformation and stress state of tunnel concrete and bolts,the diameter deformation rate was derived from the analytical solution using compatibility of deformation for a segment cross section. And the diameter deformation rate was also computed by means of incremental dynamic analysis method for different sites under various earthquakes. It is found in the study that based on two performance levels,limiting value of diameter deformation rate is obtained.
The seismic performance index system of urban mass transit underground structures is presented,which includes both intensity index of component and overall deformation index,in order to reasonably evaluate its damage degree under seismic excitations. Intensity index of component has two grades and limiting value of two grades are provided. Overall deformation index includes story drift angle for rectangular underground structures and diameter deformation rate for shield tunnels. Performance index values of urban mass transit rectangular underground structure story drift angle are put forward by reference to modified performance index values of ground structure story drift angle,which was based on a statistical analysis for experiment data of forty-six groups concrete-filled steel tubular frames and one hundred forty-five groups steel-reinforced concrete frames and took into account similarities and differences between surface structures and underground structures. Based on relation between tunnel diameter deformation and stress state of tunnel concrete and bolts,the diameter deformation rate was derived from the analytical solution using compatibility of deformation for a segment cross section. And the diameter deformation rate was also computed by means of incremental dynamic analysis method for different sites under various earthquakes. It is found in the study that based on two performance levels,limiting value of diameter deformation rate is obtained.
引文
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[13]王彪.上海长江隧道衬砌结构整环试验与研究[D].上海:同济大学,2007.WANG Biao.Analysis and test for lining whole wreath of shanghai-chongming tunnel[D].Shanghai:Tongji Universty,2007.(in Chinese)
[14]何川,张建刚,苏宗贤.大断面水下盾构隧道结构力学特性[M].北京:科学出版社,2010.HE Chuan,ZHANG Jiangang,SU Zongxian.Mechanical property for underwater largecross-sectionshield tunnel structures[M].Beijing:Science Press,2010.(in Chinese)
[15]王志良,申林方,刘国彬,等.基于弹性极限理论的盾构隧道收敛变形研究[J].铁道学报,2012,34(2):100-103.WANG Zhiliang,SHEN Linfang,LIU Guobin,et al.Research on convergence deformation of shield tunnel with elastic limit theory[J].Journal of the China Railway Society,2012,34(2):100-103.(in Chinese)
[2]王国波,谢伟平,孙明,等.地下框架结构抗震性能评价方法的研究[J].岩土工程学报,2011,33(4):593-598.WANG Guobo,XIE Weiping,Sun Ming,et al.Evaluation method for seismic behaviors of underground frame structures[J].Chinese Journal of Geotechnical Engineering,2011,33(4):593-598.(in Chinese).
[3]日本铁道技术综合研究所.铁道构造物等设计标准同解说-耐震设计[S].日本东京:丸善株式会社出版事业部,1999.Japan Railway Technical Research Institute.Design standard for railway structure-seismic design[S].Tokyo,Japan:Maruzen Publishing co.,LTD,1999.(in Chinese)
[4]T.R.Kuesel.Earthquake design criteria for subways[J].Journal of the Structural Division,ASCE,1969,95(6):1213-1231.
[5]上海市城乡建设和交通委员会.地下铁道建筑结构抗震设计规范(DG/TJ08-2008)[S].上海:上海市建筑建材业市场管理总站,2009.Shanghai Construction and Traffic Committee.Code for seismic design of subway structures[S].Shanghai:Shanghai station of the building materials industry market management,2009.(in Chinese).
[6]姚群凤,孙钧.城市地铁系统震害与对策[C].第三届全国青年岩土力学与工程会议论文集,南京:1998.YAO Qunfeng,SUN Jun.Seismic damage and countermeasure of urban mass transit[A],The theory and practice of rock and soil mechanics-The third national conference on youth in geotechnical mechanics and engineering[C].Nanjing:Hehai University Press,1998.(in Chinese)
[7]艾磊,刘洪兵,聂景伟.框架结构的基于位移概率统计的可靠度分析[J].科学技术与工程,2012,12(1):76-80.AI Lei,LIU Hongbing,Nie Jingwei.Reliability analysis of frame structures based on probability and statistics of displacement[J].Science Technology and Engineering,2012,12(1):76-80.
[8]董正方.轨道交通地下结构横向抗震设计方法与性能指标研究[D].上海:同济大学,2013.DONG Zhengfang.Study on tranverse seismic design methods and performance indices of underground structures of urban rail transit structures[D].Shanghai:Tongji Universty,2013.(in Chinese)
[9]刘祥庆.地铁地下结构地震反应分析方法与试验研究[D].北京:清华大学,2008.LIU Xiangqing.Seismic analysis methods and experimental study of underground structures of urban rail transit structures[D].Beijing:Tsinghua Universty,2008.(in Chinese)
[10]S.Nishiyama,K..Muroya,H.Haya,etc.Seismic design of cut and cover tunnel based on damage analyses and experimental studies[J].QR of RTRI,1999,40(3):158-164.
[11]顾丽江,张冬梅.盾构隧道结构受力及变形评价指标研究[C].第八届全国土木工程研究生学术论坛文集,杭州:浙江大学出版社,2010.GU Lijiang,ZHANG Dongmei.Performance-based evaluation index of shield tunnel[C].Proceedings of the 8th National Civil Engineering Forum for Graduate Stuednts,Hanzhou:2010.(in Chinese)
[12]师永翔,赵武胜.大直径盾构隧道管片接头抗弯性能研究[J].现代隧道技术,2013,50(1):115-122.SHI Yongxiang,ZHAO Wusheng.Research on flexural rigidity of the segment joint of a large-diameter shield tunnel[J].Modern Tunnelling Technology,2013,50(1):115-122.
[13]王彪.上海长江隧道衬砌结构整环试验与研究[D].上海:同济大学,2007.WANG Biao.Analysis and test for lining whole wreath of shanghai-chongming tunnel[D].Shanghai:Tongji Universty,2007.(in Chinese)
[14]何川,张建刚,苏宗贤.大断面水下盾构隧道结构力学特性[M].北京:科学出版社,2010.HE Chuan,ZHANG Jiangang,SU Zongxian.Mechanical property for underwater largecross-sectionshield tunnel structures[M].Beijing:Science Press,2010.(in Chinese)
[15]王志良,申林方,刘国彬,等.基于弹性极限理论的盾构隧道收敛变形研究[J].铁道学报,2012,34(2):100-103.WANG Zhiliang,SHEN Linfang,LIU Guobin,et al.Research on convergence deformation of shield tunnel with elastic limit theory[J].Journal of the China Railway Society,2012,34(2):100-103.(in Chinese)
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