行波效应和地下结构对地表结构抗震设计的影响
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摘要
本文以上海典型的双层地铁站上方的框架结构为例,讨论了行波效应和地下结构对地表建筑物抗震设计的影响。首先计算得到重力荷载作用下梁柱的内力值,然后考虑水平地震和竖向地震共同作用的情况,将不同地震波分量作用下梁柱的地震反应和静力反应进行组合,得到框架梁柱的抗震设计值。通过比较不同地震波输入模式下梁柱抗震设计值的差异,分析了行波效应对结构抗震设计的影响;通过比较无地下结构和有地下结构时梁柱抗震设计值的差异,分析了地下结构对结构抗震设计的影响。研究结果表明:行波效应和地下结构对该框架结构柱的影响可以不用考虑,但是对部分框架梁的抗震设计值有所增加,特别是对部分梁中轴力的增大效应较大,所以在地表建筑物的抗震设计中考虑行波效应和地下结构的影响是有必要的。
Based on a typical subway station in Shanghai and its adjacent building structures,this paper discussed the influence of wave traveling effect and underground structures on adjacent building structures.First,the static response of beams and columns under gravity load is calculated.Then the seismic response under horizontal and vertical seismic exitation is analyzed.Therefore the seismic design values of the structure is obtained by combining the static reponse and the seismic response.The influence of wave traveling effect is analyzed by comparing the seismic design values under different seismic excitation types.The influence of underground structure effect is analyzed by comparing the seismic design values of the building structures with and without a underground structure.The research results show that the influence of wave traveling effect and underground structure effect is not significant on columns,but the seismic design values of some beams increase,especially to axial force of some beams,such the influence of wave traveling effect and underground structures on seismic design of adjacent building structures should be considered.
Based on a typical subway station in Shanghai and its adjacent building structures,this paper discussed the influence of wave traveling effect and underground structures on adjacent building structures.First,the static response of beams and columns under gravity load is calculated.Then the seismic response under horizontal and vertical seismic exitation is analyzed.Therefore the seismic design values of the structure is obtained by combining the static reponse and the seismic response.The influence of wave traveling effect is analyzed by comparing the seismic design values under different seismic excitation types.The influence of underground structure effect is analyzed by comparing the seismic design values of the building structures with and without a underground structure.The research results show that the influence of wave traveling effect and underground structure effect is not significant on columns,but the seismic design values of some beams increase,especially to axial force of some beams,such the influence of wave traveling effect and underground structures on seismic design of adjacent building structures should be considered.
引文
[1]钱七虎.现代城市地下空间开发利用技术及其发展趋势[J].铁道建筑技术,2000,(5):1-6.
[2]钱七虎.岩土工程的第四次浪潮[J].地下空间,1999,19(4):267-272.
[3]楼梦麟,杨燕,潘小樟,等.汶川地震中上海高层建筑动力反应分析[J].建筑科学与工程,2009,26(3):82-88.
[4]朱小乔,楼梦麟,孔祥海.地下结构对工程场地地震动场的影响[J].震灾防御技术,2011,6(1):49-58.
[5]朱小乔.地下结构-土-上部结构动力相互作用分析[D].同济大学学位论文,2011.
[6]楼梦麟,杨明珏.竖向地震作用下地下结构对工程场地地表运动状态的影响[M].第八届全国工程结构安全防护学术会议,2011.9,绵阳
[7]楼梦麟,潘旦光,范立础.土层地震反应分析中侧向人工边界的影响[J].同济大学学报(自然科学版),2003,31(7):757-761.
[8]白建方,楼梦麟.行波输入下土层有限元网格的划分原则[J].世界地震工程,2009,25(1):48-51.
[9]杨林德,商金华,宋作雷,等.软土地铁车站结构形式对抗震性能影响的研究[J].同济大学学报(自然科学版),2009,37(7):867-871.
[10]GB50011-2010,建筑抗震设计规范[S].
[11]杨明珏.地下结构对地面结构竖向地震反应的影响[D].同济大学学位论文,2011.
[2]钱七虎.岩土工程的第四次浪潮[J].地下空间,1999,19(4):267-272.
[3]楼梦麟,杨燕,潘小樟,等.汶川地震中上海高层建筑动力反应分析[J].建筑科学与工程,2009,26(3):82-88.
[4]朱小乔,楼梦麟,孔祥海.地下结构对工程场地地震动场的影响[J].震灾防御技术,2011,6(1):49-58.
[5]朱小乔.地下结构-土-上部结构动力相互作用分析[D].同济大学学位论文,2011.
[6]楼梦麟,杨明珏.竖向地震作用下地下结构对工程场地地表运动状态的影响[M].第八届全国工程结构安全防护学术会议,2011.9,绵阳
[7]楼梦麟,潘旦光,范立础.土层地震反应分析中侧向人工边界的影响[J].同济大学学报(自然科学版),2003,31(7):757-761.
[8]白建方,楼梦麟.行波输入下土层有限元网格的划分原则[J].世界地震工程,2009,25(1):48-51.
[9]杨林德,商金华,宋作雷,等.软土地铁车站结构形式对抗震性能影响的研究[J].同济大学学报(自然科学版),2009,37(7):867-871.
[10]GB50011-2010,建筑抗震设计规范[S].
[11]杨明珏.地下结构对地面结构竖向地震反应的影响[D].同济大学学位论文,2011.
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