(1 甘肃天水绿色装配式建筑产业发展有限公司, 天水 741000; 2 甘肃第四建设集团有限责任公司, 兰州 730060; 3 天水师范学院土木工程学院, 天水 741000; 4 甘肃建投科技研发有限公司,兰州 730050)

摘要: 为研究失效工况对全填充墙钢筋混凝土( RC) 框架结构抗连续倒塌性能的影响,基于有限元软件ABAQUS,建立了不同失效工况下的全填充墙 RC 框架的抗连续倒塌分析的精细化有限元模型,选取了合适的本构模型,并与已有的试验研究结果进行了对比,验证了建模方法和本构关系选取的合理性. 在此基础上,通过对比分析了不同失效工况下的全填充墙 RC 框架结构抗连续倒塌的全过程荷载-位移关系、试件的整体破坏模式以及填充墙的局部破坏模式. 结果表明:中柱失效工况下全填充墙 RC 框架的峰值荷载最高,次边柱失效工况下次之,边柱失效工况下最低;全填充墙 RC 框架边界在强约束作用下,与失效柱相连的框架梁发生破坏,但相邻柱并不发生破坏,且填充墙会形成撑杆效应,而弱约束作用下,试件框架梁和相邻柱均会发生破坏,边界一侧无约束作用下,破坏会向有边界约束侧的相邻跨发生传递.

关键词: RC 框架; 填充墙; 连续性倒塌; 数值模拟; 失效工况

中图分类号:TU375+. 4 文献标志码:A 文章编号: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

∗甘肃省科技计划资助(21JR7RE180),天水市科技计划资助(2022-FZJHK-8557),天水师范学院科研项目资助(CXJ2021-05).

第一作者:党利荣,学士,高级工程师,主要从装配式混凝土结构研究,Email:sjdanglironng@ 126. com.

[引用本文] 党利荣,张银川,魏国强,等. 全填充墙钢筋混凝土框架不同失效工况下的抗连续倒塌机理研究[ J].建筑结构, 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.