消能減震技術(shù)在橫向單跨框架結(jié)構(gòu)抗震加固中的應(yīng)用
李彬
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（合肥市抗震辦公室， 合肥 230001）
［摘要］對多層橫向單跨框架結(jié)構(gòu)增設(shè)屈服力較小的鋼滯變消能器支撐進(jìn)行抗震加固，以提高結(jié)構(gòu)整體抗側(cè)剛度、增加單跨方向結(jié)構(gòu)冗余度，解決單跨框架結(jié)構(gòu)抗震不利的問題，僅對橫向單跨框架加固問題進(jìn)行討論。采用PKPM，ETABS軟件分別進(jìn)行小震反應(yīng)譜計(jì)算，并進(jìn)行小震、中震、大震時程分析。分析計(jì)算表明，小震作用下，鋼滯變消能器首先屈服耗能，作為第一道防線起到了保護(hù)主體結(jié)構(gòu)的作用；大震作用下，鋼滯變消能器耗能效果明顯；鋼滯變消能器支撐加固能有效地增加結(jié)構(gòu)阻尼，結(jié)構(gòu)受到的地震作用較加固前增加較小，有效地減小了加固量。［關(guān)鍵詞］單跨框架結(jié)構(gòu); 消能減震支撐; 鋼滯變消能器; 抗震加固中圖分類號：TU375.4 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2016)05-0040-04
Application of energy dissipated technology in the seismic strengthening of transverse single-span frame structureLi Bin(Hefei City Earthquake Resistant Office, Hefei 230001, China)Abstract:Seismic strengthening was carried out on a multilayer transverse single-span frame structure through setting steel hysteretic damper brace with low yield stress, in order to improve the overall structural lateral stiffness and increase structural redundancy in single-span direction and thus to solve the unfavorable seismic problem of single-span frame structure. Only seismic strengthening of transverse single-span frame was discussed. PKPM and ETABS programs were used to make the response spectrum analysis under the frequent earthquake and the dynamic time-history analysis under the frequent, fortification and rare earthquake respectively. Analysis and calculation results show that steel hysteretic damper first yields and dissipates energy under the frequent earthquake to act as the first defense line protecting the main structure. Under the rare earthquake, steel hysteretic damper has obvious energy dissipation effect. Seismic strengthening method of steel hysteretic damper brace can effectively increase damping and the structure suffers little increased earthquake input compared with the initial structure without strengthening. And workload for seismic strengthening is effectively reduced.Keywords:single-span frame structure; energy dissipated brace; steel hysteretic damper; seismic strengthening
作者簡介：李彬，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：plbym@163.com。
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