大型架空输水箱涵的抗震稳定性分析
|
摘要
结合某实际工程,根据箱涵、分缝充填材料、支墩和地基等子结构的动力特性,采用有限元法建立了某大型输水箱涵的抗震稳定性分析模型。采用反应谱法分析了在地震作用下该箱涵的抗滑和抗倾覆稳定性;为分析流体和结构的动力相互作用对箱涵内部通过修正的Westergaard公式附加质量法考虑;对箱涵及下部支墩外部采用《水运工程抗震设计规范》给出的动水压力折算成的附加质量公式进行计算,并得出了有益的结论。
In this paper,based on a practical project,the finite element method was used to establish the seismic stability analysis model for a large-scale overhead water box culvert,in which the dynamic characteristics of culvert,filling material between sections,pot-type bearing,pile and foundation were considered in whole or in part.Response spectrum method was adopted to calculate the safety coefficients of anti-sliding and anti-overturning of the structure.As to the influence of hydrodynamic pressure on the structure's seismic responses,according to the Amended Westergaard Formula Method,added water mass elements were created on nodes inside of the culvert.For nodes outside the culvert and the pile,after relevant provisions of several seismic codes been compared,the corresponding added water mass elements were also created,while the determination of magnitudes of the added water mass follows code of earthquake resistant design for water transport engineering.
In this paper,based on a practical project,the finite element method was used to establish the seismic stability analysis model for a large-scale overhead water box culvert,in which the dynamic characteristics of culvert,filling material between sections,pot-type bearing,pile and foundation were considered in whole or in part.Response spectrum method was adopted to calculate the safety coefficients of anti-sliding and anti-overturning of the structure.As to the influence of hydrodynamic pressure on the structure's seismic responses,according to the Amended Westergaard Formula Method,added water mass elements were created on nodes inside of the culvert.For nodes outside the culvert and the pile,after relevant provisions of several seismic codes been compared,the corresponding added water mass elements were also created,while the determination of magnitudes of the added water mass follows code of earthquake resistant design for water transport engineering.
引文
[1]陈厚群.南水北调工程抗震安全性问题[J].中国水利水电科学研究院学报,2003,1(1):17-22
[2]张艳红.大型渡槽抗震概论[M].北京:地震出版社,2004.
[3]冶金部建筑研究总院,国家地震局工程力学研究所,冶金部鞍山黑色冶金矿山设计研究院,等.构筑物抗震设计规范(GB50191-93)[S].北京:中国计划出版社,1993.
[4]中国水利水电科学研究院.水工建筑物抗震设计规范(SL203-97)[S].北京:中国水利水电出版社,1999.
[5]国家地震局工程力学研究所,核工业第二设计院,上海核工程研究设计院,等.核电厂抗震设计规范(GB50267-97)[S].北京:中国计划出版社,1998.
[6]中交水运规划设计院.水运工程抗震设计规范(JJJ225-98)[S].北京:中国计划出版社,1998.
[2]张艳红.大型渡槽抗震概论[M].北京:地震出版社,2004.
[3]冶金部建筑研究总院,国家地震局工程力学研究所,冶金部鞍山黑色冶金矿山设计研究院,等.构筑物抗震设计规范(GB50191-93)[S].北京:中国计划出版社,1993.
[4]中国水利水电科学研究院.水工建筑物抗震设计规范(SL203-97)[S].北京:中国水利水电出版社,1999.
[5]国家地震局工程力学研究所,核工业第二设计院,上海核工程研究设计院,等.核电厂抗震设计规范(GB50267-97)[S].北京:中国计划出版社,1998.
[6]中交水运规划设计院.水运工程抗震设计规范(JJJ225-98)[S].北京:中国计划出版社,1998.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心