脉冲荷载作用下地下结构动力特性及钢板抗层裂性能数值模拟
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摘要
利用ANSYS/LS-DYNA软件,对脉冲荷载作用下结构底面有无固定钢板时混凝土结构的动力特性及钢板的抗层裂性能进行了数值分析,对比分析了两种情况下混凝土结构的应力-时程特征,研究了边界效应对混凝土-钢板结构抗层裂性能的影响。分析表明,底面固定钢板能够有效地减小相邻混凝土的最大拉应力,提高其抗层裂性能;边界效应对混凝土层裂现象并无影响。此研究成果可为相关工程的设计、施工提供参考。
The dynamical traits and performance of spall-resistant steel panel in the structure with or without steel panel under impulsive load are simulated by the software ANSYS/LS-DYNA. On the analysis of the results of two cases,the rule of structure's stress and the boundary effects on capability of steel panel are presented. Results reveal that the steel panel can effectively reduce the element's maximal stress adjacent to the steel panel,improve the performance;boundary effects don’t affect the spalling. The work will provide reference for the design and construction of projects concerned.
The dynamical traits and performance of spall-resistant steel panel in the structure with or without steel panel under impulsive load are simulated by the software ANSYS/LS-DYNA. On the analysis of the results of two cases,the rule of structure's stress and the boundary effects on capability of steel panel are presented. Results reveal that the steel panel can effectively reduce the element's maximal stress adjacent to the steel panel,improve the performance;boundary effects don’t affect the spalling. The work will provide reference for the design and construction of projects concerned.
引文
[1]钱七虎.阿富汗战争和伊拉克战争特点、美军事革命新进展及防护工程发展的新思考——“发达国家和发展中国家的军事技术形态出现了又一轮时代差”[A].中国土木工程学会防护工程学会第九次学术年会专题报告[C].长春:[s.n.],2004.
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[10]柳锦春,方秦.爆炸荷载作用下钢板混凝土组合结构的波动分析[J].防护工程,1997,(3):45―50.LIU Jin-chun,FANG Qin.An analysis of fluctuate of the steel panel-concrete structure under explosive loads[J].Protective Engineering,1997,(3):45―50.
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[12]季倩倩.地铁车站结构振动台模型试验研究[博士学位论文D].上海:同济大学,2002.
[2]李秀地,郑颖人,徐干成.脉冲荷载作用下地下结构抗层裂钢板应用研究[J].地下空间与工程学报,2006,1(2):93.LI Xiu-di,ZHENG Ying-ren,XU Gan-cheng,Study of the application of spall-resistant steel panels for underground structure under impulsive loads[J].Chinese Journal of Underground Space and Engineering,2006,1(2):93.
[3]亨利奇J.爆炸动力学及其应用[M].熊建国译.北京:科学出版社,1987.
[4]杨林德,李文艺,祝龙根,等.上海市地铁区间隧道和车站的地震灾害防止对策研究[R].上海:同济大学,上海防灾救灾研究所,1999.
[5]北京理工软件技术开发有限公司.ANSYS/LS-DY-NA技术应用报告[R].北京:北京理工软件技术开发有限公司,2002.
[6]Holmquist T J,Johnson G R.A computational constitutive model for concrete subjected to large strains,high strain rates and high pressure[A].14th International Symposium on Ballistics[C].[s.l.]:[s.n.],1993,591―600.
[7]Livermore Software Technology Corporation.LS-DYNA Keyword User’s Manual[R].Livermore:Livermore Software Technology Corporation,2001.
[8]Livermore Software Technology Corporation.LS-DYNA Keyword User’s Manual[R].Livermore:Livermore Software Technology Corporation,2003.
[9]Crawford R E.《美国空军防护结构设计与分析手册》[M].空军后勤部工程设计局译.洛阳:[s.n.],1983.
[10]柳锦春,方秦.爆炸荷载作用下钢板混凝土组合结构的波动分析[J].防护工程,1997,(3):45―50.LIU Jin-chun,FANG Qin.An analysis of fluctuate of the steel panel-concrete structure under explosive loads[J].Protective Engineering,1997,(3):45―50.
[11]叶双序,爆炸作用基础[M].南京:解放军理工大学出版社,2001.
[12]季倩倩.地铁车站结构振动台模型试验研究[博士学位论文D].上海:同济大学,2002.
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