高速铁路客站大跨站厅结构竖向多点地震响应研究
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摘要
"房桥合一"是我国高速铁路客站建造中出现的一种新型结构形式,其兼具房屋和桥梁结构特征,轨道层列车线路的通行要求决定了上部高架站厅层具有较大跨度,而站厅结构竖向抗震性能往往是确保其地震安全的重要部分。鉴于此,首先阐述了SAP2000软件中位移模型的基本计算原理,并指出其一重要误差,继而参考天津西站建立了典型大跨站厅结构模型,对比研究了竖向多点一致、考虑行波效应竖向多点非一致地震激励下典型站厅结构动力响应特征。研究表明:依据位移模型直接计算结果来获取不参与动力平衡方程的从属结构响应分量时可能存在明显误差;竖向多点非一致输入特征对高架站厅层的地震响应有着显著影响,在抗震设计和性能评估中均不可忽视此因素,同时给出了抗震设计建议。
The vertical seismic performance of the long span hall in high-speed railway station is often the weak link under earthquake.In view of this,the basis principle for response calculation of the displacement input model in SAP2000 software was introduced,and the Tianjin West Railway Station was referred to establish the structured model of a typical station hall.Seismic response characteristics of the typical station hall under uniform,multi-point time history excitations and random earthquake excitations in consideration of travelling wave effect were studied.The results show that: utilizing response results calculated by using displacement model to solve the structural response components of subordinate structures,not involved in the dynamic equilibrium equation,may produce obvious error.The feature of multi-point input has a significant impact on vertical seismic response of elevated station hall,which should not be ignored in the seismic design and performance evaluation.Appropriate seismic design recommendations were also given in the paper.
The vertical seismic performance of the long span hall in high-speed railway station is often the weak link under earthquake.In view of this,the basis principle for response calculation of the displacement input model in SAP2000 software was introduced,and the Tianjin West Railway Station was referred to establish the structured model of a typical station hall.Seismic response characteristics of the typical station hall under uniform,multi-point time history excitations and random earthquake excitations in consideration of travelling wave effect were studied.The results show that: utilizing response results calculated by using displacement model to solve the structural response components of subordinate structures,not involved in the dynamic equilibrium equation,may produce obvious error.The feature of multi-point input has a significant impact on vertical seismic response of elevated station hall,which should not be ignored in the seismic design and performance evaluation.Appropriate seismic design recommendations were also given in the paper.
引文
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[2]刘祥.列车荷载作用下武汉站上部钢结构的疲劳分析[D].武汉:武汉理工大学,2010.
[3]周德良,李爱群,周朝阳,等.长沙南站大跨度候车厅楼盖竖向舒适度分析与检测[J].建筑结构,2011,41(7):24-30.ZHOU De-liang,LI Ai-qun,ZHOU Chao-yang,et al.Analysis and test on the comfort of the large-span waiting hall floor in South Changsha railway station[J].Building Structure,2011,41(7):24-30.
[4]王国波,谢伟平,于艳丽,等.高速列车引起的武汉站楼板振动舒适度研究[J].振动与冲击,2010,29(12):110-113.WANG Guo-bo,XIE We-ping,YU Yan-li,et al.Study on floor vibration comfort of Wuhan railway station under the running condition of high speed train[J].Journal of Vibrationand Shock,2010,29(12):110-113.
[5]李红飙.北京南站站厅钢结构多震源振动分析[D].上海:同济大学,2007.
[6]王轶,张力,甄伟,等.站桥合一的大型客站站房结构抗震性能研究[J].建筑结构,2009,39(12):23-27.WANG Yi,ZHANG Li,ZHEN Wei,et al.Study on seismic behavior of large bridge-station combined railway station[J].Building Structure,2009,39(12):23-27.
[7]甄伟,李志东,高昂,等.广州新客站结构多点输入地震反应分析[J].建筑结构,2009,39(12):28-32.ZHEN Wei,LI Zhi-dong,GAO An,et al.Time-history analysis of new Guangzhou railway station under multi-support seismic excitation[J].Building Structure,2009,39(12):28-32.
[8]余志武,邬亮,国巍.新型高速铁路客站大跨度站厅结构的竖向地震破坏特征[J].铁道科学与工程学报,2012,6:1-7.YU Zhi-wu,WU Liang,GUO Wei.Seismic failure characteristics of long-span station hall structure of new type of high-speed railway station under vertical earthquake excitation[J].Journal of Railway Science and Engineering,2012,6:1-7.
[9]Edward L W.Static and dynamic analysis of structures[M].Berkeley:Computer and Structures,Inc,2004.
[10]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.LIU Guo-huan,LI Hong-nan,LIN Hai.Comparison and evaluation of models for structural seismic responses analysis[J].Engineering Mechanics,2009,26(2):10-15.
[11]Guo W,Yu Z W,Guo Z.Error study of displacement model for seismic analysis of long-span structures subjected to multi-support earthquake excitations[C].ICSBM2011,Guangzhou,China.
[12]柳国环,李宏男,国巍.求解结构地震响应位移输入模型存在的问题及其AMCE实效对策[J].计算力学学报,2009,26(6):862-869.LIU Guo-huan,LI Hong-nan,GUO Wei.Problem inherent in displacement input model for calculating structural responses under earthquake ground motion and an effective solution method called AMCE[J].Chinese Journal of Computational Mechanics,2009,26(6):862-869.
[13]林海,张学辉.基于位移加载的地震时程分析在SAP2000中实现[C].金土木用户大会论文集,2011.
[14]中华人民共和国住房和城乡建设部.建筑抗震设计规范(GB50011-2010)[S].
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