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(華東建筑設(shè)計(jì)研究院有限公司, 上海 200002)

摘要: 基于某實(shí)際工程案例,通過(guò)設(shè)置不同的計(jì)算模型,深入分析了阻尼比取值對(duì)高層結(jié)構(gòu)地震響應(yīng)的基本影響規(guī)律特征,在此基礎(chǔ)上討論了計(jì)算方法的合理選用以及消能減震設(shè)計(jì)的相關(guān)問(wèn)題. 結(jié)果顯示,時(shí)程分析法與反應(yīng)譜法兩種方法反映出的阻尼比對(duì)地震響應(yīng)的影響呈現(xiàn)較大差異性,通常時(shí)程分析法能獲得更加顯著的地震響應(yīng)降低效果,并且這種差異性與結(jié)構(gòu)的基本周期密切相關(guān),基本周期越大則差異程度越大. 討論了脈沖型地震動(dòng)對(duì)阻尼的敏感性,結(jié)果表明提高阻尼對(duì)脈沖型地震動(dòng)輸入響應(yīng)的“削峰”作用不明顯,阻尼作用更多體現(xiàn)在對(duì)后續(xù)振動(dòng)衰減速度的影響上. 最后提出一種新的減震計(jì)算分析流程,并建議了以位移為減震目標(biāo)時(shí)的消能減震設(shè)計(jì)應(yīng)對(duì)策略.

關(guān)鍵詞: 高層結(jié)構(gòu); 阻尼比; 時(shí)程分析; 反應(yīng)譜分析; 消能減震

中圖分類號(hào):TU398. 7 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)10?0123?06

DOI:10. 19701 / j.jzjg.HDY2245

Influence law of high?rise structure damping ratio on seismic response and designdiscussion of seismic energy dissipation

AN Dongya, ZHOU Jianlong

(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)

Abstract: Based on an actual project case, through setting different calculation models, the basic characteristics of theinfluence of damping ratio value on the seismic response of high?rise structure was studied in depth, on the basis of this,the reasonable selection of calculation method and the related problems of seismic energy dissipation design were discussed.The results show that the influence of damping ratio reflected by time history analysis and response spectrum analysis wasquite different, and time history analysis method could obtain more significant reduction effect of seismic response, and thedifference was closely related to the basic period of the structure. The greater the basic period is, the greater the differenceis. The sensitivity of impulse ground motion to damping was discussed and the results show that the " peak clipping" effectof increasing damping was not obvious as to the response of impulse ground motion, and the damping effect was reflected inthe influence on the subsequent vibration attenuation speed. Finally, a new calculation and analysis process of seismicenergy dissipation was proposed, and the design strategy of seismic energy dissipation was proposed when the displacementwas taken as the target.

Keywords: high?rise structure; damping ratio; time history response analysis; response spectrum analysis; seismicenergy dissipation

∗上海超高層建筑設(shè)計(jì)工程技術(shù)研究中心”建設(shè)項(xiàng)目(14DZ2252800),上海市優(yōu)秀技術(shù)帶頭人計(jì)劃資助項(xiàng)目(21XD1430500),上海市自然科學(xué)基金資助項(xiàng)目(21ZR1415300).

第一作者:安東亞,博士,正高級(jí)工程師,主要從事性能化抗震設(shè)計(jì)與減隔震設(shè)計(jì)研究,Email:dongya_an@ ecadi.com.

[引用本文] 安東亞,周建龍. 高層結(jié)構(gòu)阻尼比取值對(duì)地震響應(yīng)的影響規(guī)律及減震設(shè)計(jì)思考[ J]. 建筑結(jié)構(gòu),2022,52(10):123?128. AN Dongya,ZHOU Jianlong. Influence law of high?rise structure damping ratio on seismic response anddesign discussion of seismic energy dissipation[J]. Building Structure,2022,52(10):123?128.