筒仓与地基相互作用对支承柱端弯矩的影响
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摘要
对钢筋混凝土柱承式筒仓动力时程分析表明,场地类别对支承柱端弯矩的变化有重要影响,在软弱场地上柱顶弯矩绝对值大于柱底弯矩绝对值;整体性较好的基础可以明显改善支承柱的受力,支承柱合理增设赘余杆也可以改善柱顶受力;文中提出了柱端弯矩增大系数及取值,以考虑地基与结构的相互作用。
According to the dynamic time history analysis of reinforced concrete silos supported by columns,it is demonstrated that the effect of site classification on moment of supporting columns is very important.In the soft site,the absolute moment on the top of the columns is bigger than that on the foot.The ground which have better integration property can obviously improve the internal force of columns.The internal force at the top end of columns by can be improved using redundant beams.The enlargement coefficient of moment at column end are given in this article to be used for considering the silo-foundation interaction.
According to the dynamic time history analysis of reinforced concrete silos supported by columns,it is demonstrated that the effect of site classification on moment of supporting columns is very important.In the soft site,the absolute moment on the top of the columns is bigger than that on the foot.The ground which have better integration property can obviously improve the internal force of columns.The internal force at the top end of columns by can be improved using redundant beams.The enlargement coefficient of moment at column end are given in this article to be used for considering the silo-foundation interaction.
引文
[1]马英儒.地震区贮仓的布置及结构形式[C]//姚伯英,主编.构筑物抗震,北京:测绘出版社,1990:185-194.
[2]GB 50191-93,构筑物抗震设计规范[S].北京:中国计划出版社,1993.
[3]王瑞萍,王命平,迟嵘.相互作用对筒承式筒仓自振基频的影响[J].青岛理工大学学报,2006,27(2):21-23.
[4]Decks A J,Randolph MF.Axis symmetric time-domain transmitting boundaries[J].Journal of Engineering Mechanics,1994,120(1):25-42.
[2]GB 50191-93,构筑物抗震设计规范[S].北京:中国计划出版社,1993.
[3]王瑞萍,王命平,迟嵘.相互作用对筒承式筒仓自振基频的影响[J].青岛理工大学学报,2006,27(2):21-23.
[4]Decks A J,Randolph MF.Axis symmetric time-domain transmitting boundaries[J].Journal of Engineering Mechanics,1994,120(1):25-42.
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