爆炸作用时钢筋混凝土柱损伤因素分析Analysis of explosion damage factors in reinforced concrete columns
吴文燕;卢伟;
WU Wen-yan;LU Wei;School of Resources and Safety Engineering, Central South University;
摘要(Abstract)：
为研究爆炸作用下钢筋混凝土柱的损伤破坏,通过有限元软件建立了钢筋混凝土柱数值计算模型,分析了5种损伤因素对柱损伤程度的影响。基于数值计算结果,以损伤指数为系统特征变量,以5种损伤因素为相关因素变量,进行了灰色关联分析。结果表明:提高箍筋配筋率和混凝土强度能够有效降低柱的损伤,纵筋配筋率对柱损伤影响相对较小;爆炸荷载下,各因素对钢筋混凝土柱损伤的影响程度从大到小依次为:炸药当量、箍筋配筋率、混凝土强度、爆源距离、纵筋配筋率。
In order to study the damage of reinforced concrete columns under the blast loading, a numerical calculation model of reinforced concrete columns is established by finite element software. The five factors in the column's damage are analyzed. Based on the numerical calculation results, the damage index is taken as the characteristic variable of system, and the five damaged factors are taken as the relevant factors, the grey relation analysis is performed. The results show that increasing the stirrup ratio and concrete strength can effectively reduce column damage, and the longitudinal reinforcement ratio has a relatively small effect on column damage. The results also indicate the influence degree of related factors on the damage of reinforced concrete columns, and the order from the largest to the smallest is: explosive equivalent, stirrup ratio, concrete strength, explosion source distance, to longitudinal reinforcement ratio.
关键词(KeyWords)：
钢筋混凝土柱;爆炸荷载;损伤指数;灰色关联分析
reinforced concrete columns;blast loading;damage index;grey relational analysis
基金项目(Foundation):
作者(Authors):
吴文燕;卢伟;
WU Wen-yan;LU Wei;School of Resources and Safety Engineering, Central South University;
DOI: 10.19931/j.EB.20200063
参考文献(References)：
- [1] 方秦，杨石刚，陈力，等.天津港“8·12”特大火灾爆炸事故建筑物和人员损伤破坏情况及其爆炸威力分析[J].土木工程学报，2017,50(3):12-18.FANG Q,YANG S G,CHEN L,et al.Analysis on the building damage personnel casualties and blast energy of the “8 ·12” explosion in Tianjin port [J].China Civil Engineering Journal,2017,50(3):12-18.
- [2] 彭利英.爆炸作用下钢筋混凝土框架柱的动力及损伤分析[J].地震工程与工程振动，2012,32(4):71-78.PENG L Y.Dynamic and damage analysis of reinforced concrete frame column under explosion [J].Journal of Earthquake Engineering and Engineering Vibration,2012,32(4):71-78.
- [3] 宗周红，唐彪，高超，等.钢筋混凝土墩柱抗爆性能试验[J].中国公路学报，2017,30(9):51-60.ZONG Z H,TANG B,GAO C,et al.Experiment on blast-resistance performance of reinforced concrete piers[J].China Journal of Highway and Transport,2017,30(9):51-60.
- [4] 师燕超，李绍琦，李忠献，等.基于实测频率的钢筋混凝土柱爆炸损伤快速评估方法[J/OL].建筑结构学报：1-10[2020-03-12].https://doi.org/10.14006/j.jzjgxb.2019.0664.SHI Y C,LI S Q,LI Z X,et al.Rapid evaluation method for blast damage of reinforced concrete columns based on measured frequency[J/OL].Journal of Building Structures:1-10[2020-03-12].https://doi.org/10.14006/j.jzjgxb.2019.0664.
- [5] LI C,YE H,HUI Q R,et al.Performances of the RC column under close-in explosion induced by the double-end-initiation explosive cylinder[J].International Journal of Impact Engineering,2019:132.
- [6] 闫秋实，杜修力.典型地铁车站柱在爆炸荷载作用下损伤评估方法研究[J].振动与冲击，2017,36(1):1-7.YAN Q S,DU X L.Damage evaluation for a column of a typical subway station subjected to internal blast loading[J].Journal of Vibration and Shock,2017,36(1):1-7.
- [7] 彭玉林，吴昊，方秦.爆炸荷载在圆截面桥梁墩柱上的分布规律[J].爆炸与冲击，2019,39(12):24-35.PENG Y L,WU H,FANG Q.Blast loading distributions on the circular sectional bridge columns[J].Explosion and Shock Wave,2019,39(12):24-35.
- [8] 唐彪.钢筋混凝土柱的抗爆性能试验研究[D].南京：东南大学，2016.TANG B.Experiment investigation of reinforced concrete bridge piers under blast loading[D].Nanjing:Southeast University,2016.
- [9] 伍俊，闫秋实.框架结构承重柱内爆炸作用下的破坏与损伤研究[J].防护工程，2011(5):24-29.WU J,YAN Q S.Study of breakage and damage of the main column of a frame structure subjected to internal explosion[J].Protective Engineering,2011(5):24-29.
- [10] 阎石，王丹，张亮，等.爆炸荷载作用下钢筋混凝土柱损伤FEM分析[J].工程力学，2008(S1):90-93.YAN S,WANG D,ZHANG L,et al.Damage analysis for RC column under explosive loads[J].Engineering Mechanics,2008(S1):90-93.
- [11] 陈肇元.爆炸荷载下的混凝土结构性能与设计[M].北京：中国建筑工业出版社，2015:48-49.CHEN Z Y.Performance and design of concrete structures under explosive loads[M].Beijing:China Construction Industry Press,2015:48-49.
- [12] WOODSON S C,BAYLOT J T.Structural collapse:quarter-scale model experiments[R].Technical Report SL-99-8,Defense Technical Information Center,1999.
- [13] SHI Y C,HAO H,LI Z X.Numerical derivation of pressure-impulse diagrams for prediction of RC column damage to blast loads[J].International Journal of Impact Engineering,2008,35(11):1 213-1 227.
- [14] 邓聚龙.灰色系统基本方法[M].武汉：华中科技大学出版社，2005.DENG J L.Basic method of gray system[M].Wuhan:Huazhong University of Science and Technology Press,2005.
- [15] 刘思峰，杨英杰，吴利丰，等.灰色系统理论及其应用[M].北京：科学出版社，2010.LIU S F,YANG Y J,WU L F,et al.Grey system theory and its application[M].Beijing:Science Press,2010.