多截面承重立柱框架结构爆破拆除数值模拟研究Numerical Simulation on Blasting Demolition of Multi-section Load-bearing Column Frame Structure
高文乐,李元振,赵德龙,张泽华
摘要(Abstract):
为进一步研究多截面承重立柱框架结构爆破拆除倒塌过程以及分析该结构钢筋混凝土柱的受力情况,利用ANSYS/LS-DYNA有限元软件,建立共节点分离式钢筋混凝土框架结构模型,对框架结构爆破拆除倒塌过程进行了数值模拟,并与工程实践进行比较。研究结果表明:数值模拟得到的框架结构倒塌过程与实际爆破的倒塌过程相一致,即分为爆破切口形成、半自由落体、切口闭合、触地解体四个阶段;半自由落体结束后,立柱与地面碰撞,首先在第1层和第2层的立柱连接处形成了保证结构顺利倒塌的"塑性铰";由于钢筋的失效强度比混凝土高得多,与钢筋单元共节点的混凝土单元失效后,由钢筋独立支撑上部结构。
关键词(KeyWords): 框架结构楼房;分离式共节点;数值模拟;爆破拆除;钢筋混凝土柱
基金项目(Foundation): 国家自然科学基金(51874189)
作者(Author): 高文乐,李元振,赵德龙,张泽华
参考文献(References):
- [1] 言志信,刘培林,叶振辉.框架剪力墙结构的定向爆破倒塌过程[J].爆炸与冲击,2011,31(6):647- 652.YAN Zhi-xin,LIU Pei-lin,YE Zhen-hui.Collapse process of directional blasting of frame shear wall structure[J].Explosion and Shock Waves,2011,31(6):647- 652.(in Chinese)
- [2] 余德运,杨军,陈大勇,等.基于分离式共结点模型的钢筋混凝土结构爆破拆除数值模拟[J].爆炸与冲击,2011,31(4):349-354.YU De-yun,YANG Jun,CHEN Da-yong,et al.Numerical simulation of blasting and demolition of reinforced concrete structures based on separated common node model[J].Explosion and Shock Waves,2011,31(4):349-354.(in Chinese)
- [3] 吴建宇,龙源,纪冲,等.城市高层框架-筒体结构建筑物拆除数值模拟研究[J].爆破,2015,32(2):95-99.WU Jian-yu,LONG Yuan,JI Chong,et al.Numerical simulation study of urban high-rise frame-cylinder structure demolition[J].Blasting,2015,32(2):95-99.(in Chinese)
- [4] 贾永胜,黄小武,王威,等.复杂环境下框剪结构烂尾楼定向爆破拆除[J].爆破,2018,35(3):92-97.JIA Yong-sheng,HUANG Xiao-wu,WANG Wei,et al.Demolition of a rotated tail tower with frame-shear structures in a complex environment by directional blasting[J].Blasting,2018,35(3):92-97.(in Chinese)
- [5] 谢先启,贾永胜,黄小武,等.17层框-剪结构大楼定向爆破拆除[J].爆破,2016,33(2):107-112.XIE Xian-qi,JIA Yong-sheng,HUANG Xiao-wu,et al.Demolition of a 17-story frame-shear structure building by directional blasting[J].Blasting,2016,33(2):107-112.(in Chinese)
- [6] 李清,杨阳,杨仁树,等.基于MAT96本构模型的钢筋混凝土结构爆破拆除数值模拟[J].爆破器材,2015,44(1):41- 45.LI Qing,YANG Yang,YANG Ren-shu,et al.Numerical simulation of blasting demolition of reinforced concrete structures based on MAT96 constitutive model[J].Blasting Equipment,2015,44(1):41- 45.(in Chinese)
- [7] 王涛,宋庆刚,谢春明,等.爆炸荷载下六层框架结构建筑爆破拆除数值模拟[J].爆破,2014,31(2):104-107,110.WANG Tao,SONG Qing-gang,XIE Chun-ming,et al.Numerical simulation of blasting demolition of a six-story frame structure building under blast load[J].Blasting,2014,31(2):104-107,110.(in Chinese)
- [8] 杨军,杨国梁,张光雄.建筑结构爆破拆除数值模拟[M].北京:科学出版社,2012.
- [9] 白金泽.LS-DYNA3D理论基础与实例分析[M].北京:科学出版社,2005.
- [10] 崔晓荣,郑炳旭,魏晓林,等.建筑爆破倒塌过程的摄影测量分析(Ⅰ)——运动过程分析[J].工程爆破,2007(3):8-13,17.CUI Xiao-rong,ZHENG Bing-xu,WEI Xiao-lin,et al.Photogrammetric analysis of the collapse process of building blasting(Ⅰ)——analysis of movement process[J].Engineering Blasting,2007(3):8-13,17.(in Chinese)
- [11] 姚颖康,谢先启,孙金山,等.钢筋混凝土立柱爆破后钢筋骨架承载特征研究[J].爆破,2017,34(4):1- 6,16,185.YAO Ying-kang,XIE Xian-qi,SUN Jin-shan,et al.Research on the bearing characteristics of reinforced concrete skeleton after blasting of reinforced concrete columns[J].Blasting,2017,34(4):1- 6,16,185.(in Chinese)