消能减震技术在横向单跨框架结构抗震加固中的应用
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（合肥市抗震办公室， 合肥 230001）
［摘要］对多层横向单跨框架结构增设屈服力较小的钢滞变消能器支撑进行抗震加固，以提高结构整体抗侧刚度、增加单跨方向结构冗余度，解决单跨框架结构抗震不利的问题，仅对横向单跨框架加固问题进行讨论。采用PKPM，ETABS软件分别进行小震反应谱计算，并进行小震、中震、大震时程分析。分析计算表明，小震作用下，钢滞变消能器首先屈服耗能，作为第一道防线起到了保护主体结构的作用；大震作用下，钢滞变消能器耗能效果明显；钢滞变消能器支撑加固能有效地增加结构阻尼，结构受到的地震作用较加固前增加较小，有效地减小了加固量。［关键词］单跨框架结构; 消能减震支撑; 钢滞变消能器; 抗震加固中图分类号：TU375.4 文献标识码：A 文章编号：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
作者简介：李彬，硕士，高级工程师，一级注册结构工程师，Email：plbym@163.com。
