新型叠层橡胶隔震支座抗拉机构研究

STUDY ON AN INNOVATION TENSILE-RESISTANT DEVICE FOR LAMINATED RUBBER BEARING

叠层橡胶隔震支座抗拉性能远小于抗压性能这一客观情况制约了叠层橡胶隔震支座在大高宽比建筑的推广应用。在研究叠层橡胶隔震支座力学性能的基础上,提出一种新型抗拉机构,利用叠层橡胶隔震支座的抗压能力来承受隔震层的拉力。通过对一栋高层隔震结构在罕遇地震中的地震响应分析,研究新型抗拉机构对大高宽比隔震结构的影响。研究表明新型抗拉机构巧妙地把拉力转化成压力,构造简单,易于设计和制造,采用新型抗拉机构,可以提高隔震层的抗拉能力,减少隔震层竖向位移,降低上部结构地震响应。此机构对于隔震技术向大高宽比结构应用和推广有实际应用的意义。

Base isolation is restricted on large aspect ratio structure due to the fact that the tensile ability of the laminated rubber bearing is poor.An innovation tensile-resistant device for laminated rubber bearing（TRDLRB） is proposed by way of taking advantage of compressive ability to resist the tensile force.Nonlinear dynamic analysis of an isolated high-rise building under severe earthquake loading is performed in this paper to study the effects of the TRDLRB.The analysis results show that,the TRDLRB is feasible because of the simple in both design and manufacture,and the vertical displacement of the isolation layer is reduced despite the tensile force caused by superstructure using TRDLRB.The study also shows that the dynamic response of the isolated high-rise building is reduced remarkably and the tensile ability of the isolation layer is improved significantly.