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.
出处
《水电能源科学》
2008年第3期92-94,162,共4页
Water Resources and Power
关键词
箱涵
抗震设计
稳定性分析
动水压力
box culvert
seismic design
stability analysis
hydrodynamic pressure
