- 摘 要
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(1 同濟大學(xué)建筑設(shè)計研究院 (集團) 有限公司, 上海 200092; 2 同濟大學(xué)土木工程學(xué)院,上海 200092)
摘要: 雙階屈服屈曲約束支撐(DYB)是近年來基于傳統(tǒng)屈曲約束支撐(BRB)提出的新型減震概念與裝置,根據(jù)構(gòu)造特點可將其分為串聯(lián)型 DYB 和并聯(lián)型 DYB 兩種. 分析了兩種 DYB 的簡化力學(xué)模型,并對其在有限元軟件SAP2000 中進行模擬,證明了有限元分析方法的準(zhǔn)確性. 以阻尼+耗能為抗震性能目標(biāo)進行設(shè)計,通過非線性時程分析,對比純框架結(jié)構(gòu)、BRB 框架結(jié)構(gòu)與 DYB 框架結(jié)構(gòu)在不同地震等級下的抗震性能及構(gòu)件受力,系統(tǒng)研究了平面框架中 DYB 框架結(jié)構(gòu)在全過程地震水準(zhǔn)下的耗能機理及受力性態(tài),并在三維框架中對并聯(lián)型 DYB 的抗震性能進行驗證. 結(jié)果表明:在以阻尼+耗能為抗震性能目標(biāo)的設(shè)計中,不應(yīng)采用串聯(lián)型 DYB,建議采用并聯(lián)型 DYB 進行設(shè)計. 并聯(lián)型 DYB 在多遇地震下即開始耗能,相比傳統(tǒng) BRB,其對框架結(jié)構(gòu)在不同地震等級尤其是多遇地震下的抗震性能改善作用最為突出,但在設(shè)計時仍需注意并聯(lián)型 DYB 帶來的“構(gòu)件內(nèi)力放大效應(yīng)”所造成的不利影響.
關(guān)鍵詞: 雙階屈服屈曲約束支撐; 框架結(jié)構(gòu); 非線性時程分析; 抗震性能
中圖分類號:TU973. 15,TU352. 1 文獻標(biāo)志碼:A 文章編號:1002-848X(2023)10-0001-09
DOI:10. 19701 / j. jzjg. LS220135
Study on seismic performance of frame structure with double-stage yield buckling restrained brace
DING Jiemin1,2, SHAO Cong2, LIU Pei1,2, WU Honglei1,2, WANG Shiyu1,2
(1 Tongji Architectural Design (Group) Co. , Ltd. , Shanghai 200092, China; 2 College of Civil Engineering,Tongji University, Shanghai 200092, China)
Abstract: Based on traditional buckling restrained brace (BRB), double-stage yield buckling restrained brace (DYB) is anew type of concept and device for energy dissipation in recent years. It can be divided into two types according to thestructural characteristics: DYB in series and DYB in parallel. Two simplified mechanical models of DYB were brieflyanalyzed and simulated in finite element software SAP2000, which proves the accuracy of finite element analysis method.The design was carried out with damping and energy-dissipation as the seismic performance goal. By nonlinear time historyanalysis, seismic performance and member stress of pure frame structure, BRB frame structure and DYB frame structureunder different seismic levels were compared. The energy dissipation mechanism and stress behavior of DYB frame structureunder different earthquakes levels were systematically studied in plane frame and the seismic performance of DYB in parallelwas verified in three-dimensional frame. The results show that DYB in series should not be used in the design of dampingand energy-dissipation as the seismic performance goal, and the DYB in parallel is recommended for the design. Comparedwith traditional BRB, DYB in parallel starts to dissipate energy under frequent earthquakes. It can improve the seismicperformance of frame structure under different seismic levels, especially under frequent earthquakes. However, the negativeeffect of " internal force amplification effect of member" caused by DYB in parallel should be paid attention to in design.
Keywords: double-stage yield buckling restrained brace; frame structure; nonlinear time history analysis,seismic performance
∗上海市青年科技英才揚帆計劃(19YF1451900),上海人才發(fā)展基金(2020057).
第一作者:丁潔民,博士,全國工程勘察設(shè)計大師,研究員,主要從事復(fù)雜結(jié)構(gòu)設(shè)計與研究,Email:djm@ tjad. cn.
[引用本文] 丁潔民,邵聰,劉沛,等. 雙階屈服屈曲約束支撐框架結(jié)構(gòu)抗震性能研究[J]. 建筑結(jié)構(gòu),2023,53(10):1-9,25. DING Jiemin,SHAO Cong,LIU Pei,et al. Study on seismic performance of frame structure with double-stage yieldbuckling restrained brace[J]. Building Structure,2023,53(10):1-9,25.
