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(1 青島理工大學(xué)土木工程學(xué)院, 青島 266033; 2 東南大學(xué)土木工程學(xué)院, 南京 210096;3 中億豐建設(shè)集團(tuán)股份有限公司, 蘇州 215131)

摘要: 對(duì)一種新型裝配式鋼混組合梁柱節(jié)點(diǎn)開(kāi)展了足尺火災(zāi)試驗(yàn),對(duì)比分析了節(jié)點(diǎn)梁和節(jié)點(diǎn)柱不同截面不同測(cè)點(diǎn)的溫度場(chǎng). 同時(shí)基于有限元軟件 ABAQUS 進(jìn)行了梁柱節(jié)點(diǎn)受火下溫度場(chǎng)的模擬分析,分析結(jié)果與試驗(yàn)結(jié)果吻合良好,驗(yàn)證了模型的可靠性. 研究結(jié)果表明,1)新型裝配式鋼混組合梁柱節(jié)點(diǎn)在火災(zāi)下的溫度場(chǎng)分布呈外高內(nèi)低的趨勢(shì),在受火 1h 后,試件梁柱截面表層 50mm 以?xún)?nèi)的混凝土最高溫度基本在 400℃左右,而截面中心處溫度均在200℃以下,預(yù)測(cè)梁柱節(jié)點(diǎn)的承載能力下降有限;2)梁端鋼接頭的存在會(huì)使梁溫度場(chǎng)發(fā)生重分布;3)火災(zāi)下梁柱節(jié)點(diǎn)核心區(qū)溫度較低,是相對(duì)安全的.

關(guān)鍵詞: 裝配式; 鋼混組合梁柱節(jié)點(diǎn); 火災(zāi)試驗(yàn); 溫度場(chǎng); 有限元模擬

中圖分類(lèi)號(hào):TU398+. 2 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)11-0081-07

DOI:10. 19701 / j. jzjg. 20210501

Research on temperature field of a new assembled steel-concrete composite beam-column joint under fire

JIANG Huanzhi1,2, PAN Jie2, GUO Zhengxing2, GONG Changyi3

(1 College of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China;2 School of Civil Engineering, Southeast University, Nanjing 210096, China;3 Zhongyifeng Construction Group Co. , Ltd. , Suzhou 215131, China)

Abstract: The fire experimental study was carried out on a full-scale new assembeled steel-concrete compositebeam-column joint. The temperature field under fire of different sections and different measuring points of joint beam andjoint column were compared and analyzed. Finite element analysis was also conducted based on the software ABAQUS tosimulate the temperature field of beam-column joint under fire. The analysis results were in good agreement with the testresults, which verifies the reliability of the model. The results show that: 1) the temperature field distribution of the newassembled steel-concrete composite beam-column joint under fire was gradually decreasing from the outside to the inside.After one hour of fire, the maximum temperature of the concrete within 50mm of the surface layer of the beam columnsection reached about 400℃ , while the temperature of the concrete at the core of the section was below 200℃ , whichindicates that the decrease in bearing capacity of the joint was limited; 2) the existence of steel joint at the end of beamwould make the temperature field redistribute; 3) the temperature in the core area of beam-column joint under fire was lowand relatively safe.

Keywords:assembled; steel-concrete composite beem-column joint; fire test; temperature field; finite element simulation

∗國(guó)家重點(diǎn)研發(fā)計(jì)劃 ( 2016YFC0701703), 國(guó)家自然科學(xué)基金 ( 51678136), 青島理工大學(xué) ( 臨沂) 博士科研啟動(dòng)基金(20312001),青島理工大學(xué)臨沂校區(qū)自然科學(xué)重點(diǎn)培育科研項(xiàng)目資助(20304116),青島理工大學(xué)臨沂校區(qū)自然科學(xué)基金項(xiàng)目資助(20304123、2030404).

第一作者:江煥芝,博士,講師,主要從事裝配式建筑結(jié)構(gòu)設(shè)計(jì)和施工等相關(guān)研究,Email: jianghuanzhi@ qut. edu. cn.

[引用本文] 江煥芝,潘杰,郭正興,等. 新型裝配式鋼混組合梁柱節(jié)點(diǎn)受火溫度場(chǎng)研究[ J]. 建筑結(jié)構(gòu),2023,53(11):81-87. JIANG Huanzhi,PAN Jie,GUO Zhengxing,et al. Research on temperature field of a new assembled steelconcrete composite beam-column joint under fire[J]. Building Structure,2023,53(11):81-87.