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(1 甘肅天水綠色裝配式建筑產(chǎn)業(yè)發(fā)展有限公司, 天水 741000; 2 甘肅第四建設(shè)集團(tuán)有限責(zé)任公司, 蘭州 730060; 3 天水師范學(xué)院土木工程學(xué)院, 天水 741000; 4 甘肅建投科技研發(fā)有限公司,蘭州 730050)

摘要: 為研究失效工況對(duì)全填充墻鋼筋混凝土( RC) 框架結(jié)構(gòu)抗連續(xù)倒塌性能的影響,基于有限元軟件ABAQUS,建立了不同失效工況下的全填充墻 RC 框架的抗連續(xù)倒塌分析的精細(xì)化有限元模型,選取了合適的本構(gòu)模型,并與已有的試驗(yàn)研究結(jié)果進(jìn)行了對(duì)比,驗(yàn)證了建模方法和本構(gòu)關(guān)系選取的合理性. 在此基礎(chǔ)上,通過(guò)對(duì)比分析了不同失效工況下的全填充墻 RC 框架結(jié)構(gòu)抗連續(xù)倒塌的全過(guò)程荷載-位移關(guān)系、試件的整體破壞模式以及填充墻的局部破壞模式. 結(jié)果表明:中柱失效工況下全填充墻 RC 框架的峰值荷載最高,次邊柱失效工況下次之,邊柱失效工況下最低;全填充墻 RC 框架邊界在強(qiáng)約束作用下,與失效柱相連的框架梁發(fā)生破壞,但相鄰柱并不發(fā)生破壞,且填充墻會(huì)形成撐桿效應(yīng),而弱約束作用下,試件框架梁和相鄰柱均會(huì)發(fā)生破壞,邊界一側(cè)無(wú)約束作用下,破壞會(huì)向有邊界約束側(cè)的相鄰跨發(fā)生傳遞.

關(guān)鍵詞: RC 框架; 填充墻; 連續(xù)性倒塌; 數(shù)值模擬; 失效工況

中圖分類號(hào):TU375+. 4 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)02-0100-07

DOI:10. 19701 / j. jzjg. 20212024

Study on mechanism of anti-progressive collapse of full-height infill-wall reinforced concrete frames under different failure conditions

DANG Lirong1, ZHANG Yinchuan2, WEI Guoqiang3, YAO Shuchi2, QI Shengwang4

(1 Gansu Tianshui Green Prefabricated Building Industry Development Co. , Ltd. , Tianshui 741000, China; 2 Gansu FourthConstruction Group Co. , Ltd. , Lanzhou 730060, China; 3 School of Civil Engineering, Tianshui Normal University,Tianshui 741000, China; 4 Gansu Jiantou Technology Research and Development Co. , Ltd. , Lanzhou 730050, China)

Abstract: In order to study the effect of failure conditions on the anti-progressive collapse of full-height infill-wallreinforced concrete (RC) frame structures, based on the finite element software ABAQUS, a fine finite element model forthe analysis of anti-progressive collapse of full-height infill-wall RC frames under different failure conditions wasestablished, the suitable intrinsic structure model was selected, and compared with the existing experimental results, whichverified the rationality of the modeling method and the selection of principal structure relationship. On this basis, the wholeprocess load-displacement relationship of full-height infill-wall RC frame structure with different failure conditions toanti-progressive collapse, the overall damage mode of specimens, and the local damage mode of infill-wall were analyzed bycomparing. The results show that the peak load of full-height infill-wall RC frame under the failure condition of centercolumn is the greatest, while the second-highest under the failure condition of the second side column, and the the lowestunder the failure condition of the side column; the frame beam connected to failed column is damaged under the strongrestraint effect of full-height infill-wall RC frame boundary, but the adjacent column is not damaged, and the infill-wall willform bracing effect, while under the weak restraint effect both frame beam and adjacent column of specimen will bedamaged, and under the direct action on one side of boundary, the damage will be transmitted to the adjacent span withboundary restraint side.

Keywords:reinforced concrete frame; infill-wall; progressive collapse; numerical simulation; failure condition

∗甘肅省科技計(jì)劃資助(21JR7RE180),天水市科技計(jì)劃資助(2022-FZJHK-8557),天水師范學(xué)院科研項(xiàng)目資助(CXJ2021-05).

第一作者:黨利榮,學(xué)士,高級(jí)工程師,主要從裝配式混凝土結(jié)構(gòu)研究,Email:sjdanglironng@ 126. com.

[引用本文] 黨利榮,張銀川,魏國(guó)強(qiáng),等. 全填充墻鋼筋混凝土框架不同失效工況下的抗連續(xù)倒塌機(jī)理研究[ J].建筑結(jié)構(gòu), 2023, 53 ( 2): 100-106. DANG Lirong, ZHANG Yinchuan, WEI Guoqiang, et al. Study on mechanism ofanti-progressive collapse of full-height infill-wall reinforced concrete frames under different failure conditions[J]. BuildingStructure,2023,53(2):100-106.