(1 北京市建筑设计研究院有限公司， 北京 100045； 2.云南震安减震科技有限公司， 昆明  650217；3 领地集团股份有限公司，  成都 610041)

［摘要］针对高烈度区高层结构采用橡胶支座隔震时存在的支座受拉问题进行了研究。通过对拉力产生的机理以及拉力与刚度相关性进行分析，发现拉应力水平与受拉刚度的大小密切相关。为避免因拉应力影响支座水平隔震效果，提高结构在罕遇地震乃至巨震下的抗震性能，发明了一种与橡胶支座配套使用的提离装置，介绍了提离装置的构造、典型受力状态的工作原理，并对提离装置与橡胶支座组合后的力学本构进行分析。对装置进行力学试验研究，试验研究表明，提离装置在各典型受力状态下的受力性能能够达到设计预期。结合实际工程进行抗拉问题的多方案对比，对比结果表明，采用提离装置能更有效、更经济地解决支座抗拉问题，可给类似工程设计提供借鉴。

［关键词］高烈度； 橡胶隔震支座； 提离装置； 受拉性能

中图分类号：TU352-1文献标识码：A文章编号：1002-848X(2019)18-0013-06

Research and application of tensile problem for building isolated bearing

Miao Qisong1， Bu Longgui1， Ge Dongdong1， Guan Qingsong2， Huang Zhangyun3

(1 Beijing Institute of Architectural Design, Beijing 100045, China； 2 Yunnan Quakesafe Seismic Isolation Technologies Co., Ltd., Kunming 650217, China; 3 Leading-group Co., Ltd., Chengdu 610041, China)

Abstract:The tensile problem of rubber isolation bearing in high-rise buildings in high seismic fortification intensity area was studied. By analyzing the mechanism of tension and the correlation between tension and stiffness, it is found that the level of tension stress is closely related to the size of tension stiffness. A lift-off device matched with the rubber bearing was invented in order to avoid the influence of the tension stress on the horizontal isolation effect of the bearing and improve the seismic performance of the structure under rare earthquakes and even mega earthquakes. The structure of the lift-off device and the working principle of the typical stress state were introduced, and the mechanical constitution of the lift-off device combined with the rubber bearing was also analyzed. The mechanical test results show that the mechanical performance of the lift-off device can meet the design expectation under various typical loading conditions. Comparisons of various schemes for the tension problems in practical projects show that the lift-off device can solve the tensile problems of bearings more effectively and economically, which can provide a reference for similar engineering designs.

Keywords:high seismic fortification intensity; rubber isolation bearing; lift-off device; tensile property

作者简介：苗启松，博士，教授级高级工程师，一级注册结构工程师，Email：miaoqisong@biad.com.cn。