考虑不同底层结构形式和刚度的柱顶隔震结构试验研究

发布时间：2018-04-04 15:42

本文选题：底层柱顶隔震　切入点：带拉梁框架柱　出处：《应用基础与工程科学学报》2017年03期

【摘要】：钢筋混凝土底层柱顶隔震结构的底层通常为带拉梁框架柱和独立柱两种形式,为了验证这类结构的安全以及提出底层结构选型建议,开展了结构模型振动台试验,研究了底层为带拉梁框架柱和独立柱这两种结构在不同幅值地震作用下的加速度和位移响应,重点分析其底层结构的地震响应.试验原型为某实际结构中典型的一榀横向框架,制作安装了缩尺的两种柱顶隔震模型和对比的抗震模型.试验结果表明,两种隔震模型的上部楼层加速度和位移反应减震效果显著;底层加速度反应减震效果较差,而位移的减震效果尤为显著,表明按照GB 50011—2010《建筑抗震设计规范》的要求设计,强震下这类底层柱顶隔震结构是安全的.数值分析表明,当底层柱刚度减小至同抗震模型时,强震下独立柱出现较大的弹塑性变形,带拉梁框架柱比独立柱更有效地提高底层层间位移减震效果,建议工程应用中底层结构选取独立柱形式时,应加大其刚度.
[Abstract]:In order to verify the safety of this kind of structure and to suggest the selection of bottom structure, the vibration table test of structural model is carried out in order to verify the safety of reinforced concrete bottom column top isolation structure, which is usually in the form of frame column with pulling beam and independent column, in order to verify the safety of this kind of structure.In this paper, the acceleration and displacement responses of two kinds of structures, frame column with pull beam and independent column with different amplitudes, are studied, and the seismic response of the bottom structure is analyzed.The test prototype is a typical transverse frame of a practical structure. Two kinds of cylindrical isolation models and a contrast seismic model are made.The experimental results show that the damping effect of the upper floor acceleration and displacement response of the two kinds of isolation models is remarkable, the response of the bottom acceleration response is not good, but the displacement damping effect is particularly significant.According to the requirements of GB50011-2010 Code for Seismic Design of buildings, it is safe to design this kind of structure under strong earthquake.Numerical analysis shows that when the stiffness of the bottom column is reduced to the same seismic model, the elastic plastic deformation of the independent column appears under strong earthquake, and the frame column with pulling beam is more effective than the independent column in improving the effect of the displacement reduction between the bottom layers.It is suggested that the stiffness of the bottom structure should be increased when the independent column is selected in the engineering application.
【作者单位】：福州大学土木工程学院;
【基金】：国家自然科学基金项目(51578160)
【分类号】：TU352.12

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