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(1 北京市建筑設(shè)計研究院有限公司， 北京 100045； 2.云南震安減震科技有限公司， 昆明 650217；3 領(lǐng)地集團股份有限公司， 成都 610041)
［摘要］針對高烈度區(qū)高層結(jié)構(gòu)采用橡膠支座隔震時存在的支座受拉問題進行了研究。通過對拉力產(chǎn)生的機理以及拉力與剛度相關(guān)性進行分析，發(fā)現(xiàn)拉應(yīng)力水平與受拉剛度的大小密切相關(guān)。為避免因拉應(yīng)力影響支座水平隔震效果，提高結(jié)構(gòu)在罕遇地震乃至巨震下的抗震性能，發(fā)明了一種與橡膠支座配套使用的提離裝置，介紹了提離裝置的構(gòu)造、典型受力狀態(tài)的工作原理，并對提離裝置與橡膠支座組合后的力學(xué)本構(gòu)進行分析。對裝置進行力學(xué)試驗研究，試驗研究表明，提離裝置在各典型受力狀態(tài)下的受力性能能夠達到設(shè)計預(yù)期。結(jié)合實際工程進行抗拉問題的多方案對比，對比結(jié)果表明，采用提離裝置能更有效、更經(jīng)濟地解決支座抗拉問題，可給類似工程設(shè)計提供借鑒。
［關(guān)鍵詞］高烈度； 橡膠隔震支座； 提離裝置； 受拉性能
中圖分類號：TU352-1文獻標(biāo)識碼：A文章編號：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
作者簡介：苗啟松，博士，教授級高級工程師，一級注冊結(jié)構(gòu)工程師，Email：miaoqisong@biad.com.cn。
