钢筋混凝土柱承式筒仓地震反应分析-结构工程专业论文.docxVIP

青岛理工人学硕士学位论文 摘 要 针对柱承式简仓仓上建筑的震害现象，本文按照质量比和刚度比的不同建立了130 个筒仓模型，并对这些模型按照考虑仓体转动和不考虑仓体转动两种计算简图，利用振 型分解反应谱法进行计算，求解出仓顶室层问剪力。通过分析得出仓体转动对柱承式筒 仓仓顶室的地震反应有不可忽略的影响，并对构筑物抗震规范中仓顶室层问剪力放大系 数的取值提出了修改意见。 针对柱承式筒仓支承柱的震害现象，本文考虑结构与地基的相互作用，利用有限元 软件ANSYS对柱承式筒仓进行动力时程分析。通过分析得出不同类型场地和基础对柱 承式筒仓支承柱受力性能存在不同的影响。总结出了不同场地上柱承式筒仓柱顶内力放 大系数，并提出在较软弱的三类和四类场地下采用整体性较好的基础可以有效改善柱端 受力。 合理采用赘余杆可以有效提高支承柱延性，改善柱端内力分??。本文在考虑结构与 地基共同工作的前提下，通过对增设赘余杆和不设赘余杆的柱承式筒仓进行动力时程分 析比较，得出不同地基条件下赘余杆对支承柱抗震性能的影响。 关键词：柱承式筒仓；仓顶室；鞭梢效应；赘余杆；地基；相互作用；动力分析  青岛理T大学硕十学位论文 Abstract This paper analyzed 130 models of silos supported by commas in order to study the whilsah effect of projecting structure．We USe different simplified calculation figure with writhe action or without writhe anion to calculate the stress of projecting structure．By comparing the result，we analyzed the effect of writhe to the earthquake reaction of projecting structure of silos supposed by columns，and put forth advice about the increscent factor of stless ofprojecting structures to revise the canon of construction resisting earthquake action． This paper used the program of ANSYS to analyze the silos supported by columns with dynamic analysis when the interaction of stmcture and foundation are considered．It gets the result that the different kinds foundations and bases have difierent effect to the columns of silos．The increscent factor of columns stress are given under different kinds of foundations．It puts forth that the integration bases should be used under the third and fourth foundation in Order to ameliorate the stress of columns． Using confluence beams can improve the elongation capability of columns，and meliorate the stress of columns．This paper analyzed the silos supported by columns with beams and without beams using dynamical analysis when the interaction of structure and foundation are considered，and put forth effect of beams to the stress of columns under different foundations． Key Words：silos supported by columns，projecting structure，whilsah effect， horizen