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（福州市規(guī)劃設(shè)計(jì)研究院， 福州 350108）

［摘要］閩投營(yíng)運(yùn)中心采用豎向構(gòu)件為鋼管混凝土柱的框架-支撐芯筒結(jié)構(gòu)體系。結(jié)合蓋挖逆作法進(jìn)行施工時(shí)，需在地下室頂板對(duì)防震縫兩側(cè)的鋼管混凝土柱進(jìn)行單、雙柱轉(zhuǎn)換。對(duì)6種轉(zhuǎn)換節(jié)點(diǎn)方案進(jìn)行比較，最終選用新型環(huán)形鋼牛腿轉(zhuǎn)換節(jié)點(diǎn)作為單、雙柱的轉(zhuǎn)換方案。轉(zhuǎn)換節(jié)點(diǎn)承擔(dān)的荷載巨大且受力情況復(fù)雜，采用ABAQUS有限元軟件對(duì)節(jié)點(diǎn)的力學(xué)性能進(jìn)行數(shù)值模擬和分析。結(jié)果表明，新型環(huán)形鋼牛腿轉(zhuǎn)換節(jié)點(diǎn)構(gòu)造可靠，能夠滿足中震彈性的抗震性能設(shè)計(jì)目標(biāo)。

［關(guān)鍵詞］閩投營(yíng)運(yùn)中心； 鋼管混凝土柱； 環(huán)形鋼牛腿； 轉(zhuǎn)換節(jié)點(diǎn)； 有限元分析； 蓋挖逆作法施工

中圖分類(lèi)號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)11-0064-06

Finite element analysis on the mechanical performance of new type circular steel corbel conversion joint

CHEN Wei

（Fuzhou Planning Design & Research Institute， Fuzhou 350108， China）

Abstract:The Fujian Investment Operation Center adopts a frame-brace-core tube structure system with vertical members as concrete-filled steel tube columns. When the construction was carried out in combination with the cover excavation and reverse construction method, it is necessary to perform single and double-column conversion of the concrete-filled steel tube columns on both sides of the antiseismic joint on the roof of the basement. Comparing the six conversion joint schemes, the new circular steel corbel conversion joint was selected as the single and double column conversion scheme. The load carried by the conversion joint is huge and the stress is complicated. The ABAQUS finite element software was used to numerically simulate and analyze the mechanical properties of the joint. The results show that circular steel corbel conversion joint has a reliable structure, which can meet the design goal of elastic seismic performance under intermediate earthquake.

Keywords:Fujian Investment Operation Center； concrete-filled steel tube column; circular steel corbel; conversion joint; finite element analysis; cover excavation and reverse construction method

*福建省科技計(jì)劃重點(diǎn)項(xiàng)目(2017Y0024)。

作者簡(jiǎn)介：陳煒，碩士，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:chweien@163.com。