立式浮顶储罐地震响应分析
|
摘要
研究浮顶振动对立式储罐地震响应的影响时,假定浮顶运动为均质刚性圆板振动,运用储罐速度势理论给出了液体运动势函数、基底剪力、倾覆力矩公式,从薄板理论出发建立浮顶的弯矩表达。由Hamilton原理和虚功原理建立了浮顶储罐抗震体系的运动控制方程。采用时程分析方法对浮顶储罐进行地震响应分析,并与未考虑浮顶影响的储罐地震响应进行对比。数值结果表明,考虑浮顶作用具有降低地震响应的效果。
When studying the seismic response of vertical tanks with floating roofs,we assumed that the motion of the floating roof is the vibration of a homogeneous rigid circular plate.We gave the potential function of the liquid motion as well as the base shear and overturning moment equations using the velocity potential theory,while establishing the bending moment expression for the floating roof based on the thin-plate theory.In addition,we established the motion control equation for the seismic resistance system of tanks with floating roofs based on Hamilton's principle and the virtual work principle.We analyzed the seismic response of tanks with floating roofs using the time-history analysis method and compared it with that of tanks when effects of floating roofs are not considered.The numerical result shows that the seismic response can be reduced if effects of floating roofs are considered.
When studying the seismic response of vertical tanks with floating roofs,we assumed that the motion of the floating roof is the vibration of a homogeneous rigid circular plate.We gave the potential function of the liquid motion as well as the base shear and overturning moment equations using the velocity potential theory,while establishing the bending moment expression for the floating roof based on the thin-plate theory.In addition,we established the motion control equation for the seismic resistance system of tanks with floating roofs based on Hamilton's principle and the virtual work principle.We analyzed the seismic response of tanks with floating roofs using the time-history analysis method and compared it with that of tanks when effects of floating roofs are not considered.The numerical result shows that the seismic response can be reduced if effects of floating roofs are considered.
引文
[1]黄志光,汪荣顺,石玉美,等.2001年LNG工业综述[J].能源与环境,2002,21(4):1-2.
[2]温德超,郑兆昌,孙焕纯.储液罐抗震研究进展[J].力学进展,1995,25(1):60-76.
[3]HOUSNER G.Dynamic pressure on accelerated fluidcontainers[J].Bulletin of the Seismological Society of A-merica,1957,1(47):15-35.
[4]HAROUNMA,WAJDI AI.Parameter study of seismicsoil-tank interaction,Ⅰ:Horizontal Excitation[J].ASCE,1992,118(3):783-797.
[5]孙建刚.立式储罐地震响应控制研究[D].哈尔滨:中国地震局工程力学研究所,2002.
[6]孙建刚.大型立式储罐隔震——理论、方法及实验[M].北京:科学出版社,2010.
[2]温德超,郑兆昌,孙焕纯.储液罐抗震研究进展[J].力学进展,1995,25(1):60-76.
[3]HOUSNER G.Dynamic pressure on accelerated fluidcontainers[J].Bulletin of the Seismological Society of A-merica,1957,1(47):15-35.
[4]HAROUNMA,WAJDI AI.Parameter study of seismicsoil-tank interaction,Ⅰ:Horizontal Excitation[J].ASCE,1992,118(3):783-797.
[5]孙建刚.立式储罐地震响应控制研究[D].哈尔滨:中国地震局工程力学研究所,2002.
[6]孙建刚.大型立式储罐隔震——理论、方法及实验[M].北京:科学出版社,2010.
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