柱承式钢筋混凝土筒仓的地震反应研究

Study on Seismic Response of Column Supported Reinforced Concrete Silos

本文以包头骨料项目22 m内径柱承式筒仓为实例,在PKPM软件计算的基础上,采用SAP2000、Midas Gen和盈建科软件对PKPM软件计算的结果进行校核,对抗震设防烈度6度地区水平地震力作用下的筒仓模型进行模态分析,并对比四种软件中筒仓结构的位移反应、剪重比以及抗侧移刚度等指标。结果表明:柱承式钢筋混凝土筒仓结构的整体抗扭刚度较弱,在结构布置上应增强角柱的抗震平衡性;仓下支承柱抗侧移刚度较弱,仓壁的抗侧移刚度远大于支承柱且刚度比较均匀,在库底板与仓壁之间会出现刚度突变。

This paper taking Baotou aggregate project 22 m inner diameter column supported silo as an example,on the basis of PKPM calculation,SAP2000,Midas Gen and YJK software are used to check and compare the results.The research method is to conduct modal analysis of the model under the horizontal seismic force in the area with seismic fortification intensity of 6 degrees,and compares the displacement response,shear weight ratio and antilateral stiffness of the silo structure in four kinds of software.The results show that the overall torsional stiffness of the reinforced concrete silo structure is weak,and the seismic balance of the corner column should be enhanced in the structure layout.The lateral stiffness of the supporting column under the bin is weak.The lateral stiffness of the silo wall is much higher than that of the supporting column and more uniform,and there is a sudden change in stiffness between the silo floor and the silo wall.