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孫遜，方立新，邱一峰，戰(zhàn)龍龍，陳庚俊

（東南大學(xué)土木工程學(xué)院， 南京 210096）

 

［摘要］屈曲約束支撐（BRBs）框架因具有良好的耗能能力而被越來(lái)越多的多、高層結(jié)構(gòu)所采用，但其結(jié)合整體結(jié)構(gòu)在不同設(shè)防烈度水準(zhǔn)下全過程的受力和變形特征并未被引起重視。人民日?qǐng)?bào)社報(bào)刊綜合業(yè)務(wù)樓是在高烈度區(qū)全面采用屈曲約束支撐的高層鋼結(jié)構(gòu)建筑，對(duì)該結(jié)構(gòu)進(jìn)行了設(shè)防烈度和罕遇烈度地震作用下的彈塑性時(shí)程分析。重點(diǎn)揭示了屈曲約束支撐的耗能能力、實(shí)際的變形情況、結(jié)構(gòu)的殘余變形，以及屈曲約束支撐對(duì)其他主體結(jié)構(gòu)構(gòu)件的影響等。對(duì)于采用BRBs作為主要抗側(cè)力構(gòu)件的高層鋼結(jié)構(gòu)，在遭遇設(shè)防烈度以上地震時(shí)，抗力由支撐向框架轉(zhuǎn)移的現(xiàn)象是明顯的，框架部分特別是框架梁的耗能和損傷不容忽視。

［關(guān)鍵詞］高層鋼結(jié)構(gòu)；屈曲約束支撐；彈塑性時(shí)程分析；殘余變形

中圖分類號(hào)：TU311-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2012)09-0056-05

 

Sun Xun, Fang Lixin, Qiu Yifeng, Zhan Longlong, Chen Gengjun

( School of Civil Engineering, Southeast University, Nanjing 210096, China )

 

Abstract: The buckling resistance braces (BRBs) are widely used in the multiple and high-rise structures due to its well energy dissipation capacity, but the loading and deflection characteristics of the whole structure with the BRBs still need to be further studied. The People’s Daily office building is the first high-rise steel frames with the BRBs as the main role to resist the horizontal loads. The elasto-plastic time history analysis method was used to study the structural performance under the moderate and severe earthquakes. The strain of the BRBs, the residual drifts of the structures and the yield status of the structural members were be found. The results revealed the loading shift from the braces to the frames under the moderate or severe earthquake, the frames in the high-rise buildings still play the main role in resisting the horizontal loads, the energy dissipation and the damage of frame beams cannot be ignored.

Keywords: high-rise steel structure; buckling resistance brace; elasto-plastic time history analysis; residual deformation

作者簡(jiǎn)介：孫遜，博士，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: sunxun@seu.edu.cn。

 

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