本文選題：偏心支撐框架　切入點(diǎn)：高強(qiáng)鋼　出處：《建筑結(jié)構(gòu)學(xué)報(bào)》2017年06期 　論文類型：期刊論文

【摘要】：為研究Y形偏心支撐-高強(qiáng)鋼框架結(jié)構(gòu)抗震性能,在已完成的1∶2縮尺3層模型結(jié)構(gòu)振動(dòng)臺(tái)試驗(yàn)的基礎(chǔ)上,重新設(shè)計(jì)了耗能梁段,并對(duì)該結(jié)構(gòu)再次進(jìn)行振動(dòng)臺(tái)試驗(yàn)。試驗(yàn)中選取El Centro波、Taft波和蘭州波作為地震動(dòng)輸入并考慮7度多遇到9度罕遇的地震水準(zhǔn),分析了結(jié)構(gòu)在水平地震作用下的動(dòng)力特性、加速度響應(yīng)、位移響應(yīng)、應(yīng)變響應(yīng)、剪力分布等,并與已有試驗(yàn)結(jié)果進(jìn)行了對(duì)比。通過ABAQUS建立了有限元分析模型,與試驗(yàn)結(jié)果進(jìn)行對(duì)比。結(jié)果表明:該結(jié)構(gòu)在多遇地震作用下處于彈性狀態(tài),在罕遇地震作用下表現(xiàn)為耗能梁段的局部破壞;耗能梁段破壞后,結(jié)構(gòu)剛度大幅下降,但未發(fā)生倒塌;在多遇地震和罕遇地震作用下,結(jié)構(gòu)的最大層間位移角滿足抗震規(guī)范層間位移角限值的相關(guān)要求;在罕遇地震作用下,耗能梁段進(jìn)入塑性狀態(tài)而進(jìn)行耗能,其他構(gòu)件仍保持彈性狀態(tài);所建立的有限元模型可以有效模擬振動(dòng)臺(tái)試驗(yàn)結(jié)果。
[Abstract]:In order to study the seismic behavior of Y-shaped eccentrically braced high-strength steel frame structure, the energy-dissipation beam section was redesigned on the basis of the completed shaking table test of a 3-story model structure with 1: 2 scale. In the experiment, El Centro wave Taft wave and Lanzhou wave are selected as the input of ground motion, and the earthquake level of 9 degrees is considered, and the dynamic characteristics of the structure under horizontal earthquake are analyzed. The acceleration response, displacement response, strain response, shear force distribution and so on are compared with the experimental results. The finite element analysis model is established by ABAQUS. Compared with the experimental results, the results show that the structure is in an elastic state under the action of frequent earthquakes, and appears as the local failure of the energy-dissipated beam section under the rare earthquake, and the stiffness of the structure decreases significantly after the damage of the energy-dissipated beam segment. However, the maximum interstory displacement angle of the structure meets the relevant requirements of the interstory displacement angle limit of the seismic code under the action of frequent and rare earthquakes; under the rare earthquake, the energy dissipation beam section enters the plastic state and consumes energy. Other components remain elastic and the finite element model can effectively simulate the shaking table test results.
【作者單位】： 西安建筑科技大學(xué)土木工程學(xué)院;西安建筑科技大學(xué)材料科學(xué)與工程博士后流動(dòng)站;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51178382,51478380)
【分類號(hào)】：TU352.11;TU391

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本文編號(hào)：1622268