近爆冲击波和破片复合作用下预应力钢筋混凝土空心板梁的损伤效应分析
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摘要
通过数值分析研究预应力钢筋混凝土空心板梁在近爆冲击波和预制破片复合作用下的损伤情况。通过非线性有限元软件ANSYS/LS_DYNA模拟预应力混凝土板的爆炸试验和炸药驱动预制破片的试验,验证本文所采用的材料本构模型及技术路线的合理性与可靠性,研究爆炸波、破片荷载及二者复合作用下预应力空心板梁的动态响应的差异,同时运用参数化分析方法,研究张拉控制应力、预应力损失水平、混凝土强度、普通钢筋纵筋配筋率及箍筋间距对空心板梁动力响应的影响。研究结果表明:随着张拉控制应力增大,构件的抗爆性能显著增强;在相同张拉控制应力作用下,即使构件有不同水平的应力损失,其抗爆性能也基本相同;提高混凝土强度对构件的抗爆性能的提升作用并不明显;普通钢筋纵筋配筋率的提升在一定范围内可以小幅度提高构件的抗爆性能;随着箍筋间距增加,构件的抗爆性能明显减弱。
Numerical analysis was carried out to research the damage situations of prestressed reinforced concrete hollow beams under the synergistic effects of blast and fragments. Finite element software ANSYS/LS-DYNA was used to simulate the blast test of the prestressed concrete panel and the experiment of explosive driving prefabricated fragments.The reliability of the material constitutive models and technical route used in this paper was verified. The differences in the dynamic response of the hollow beam under the influences of blast wave, fragment load and both of them were analyzed. At the same time, parametric studies were carried out to investigate the effects of tensile control stress, level of stress loss, concrete strength, reinforcement ratio, and spacing of stirrups on dynamic response of the prestressed concrete hollow beam. The results show that with the increase of tensile control stress, the anti-explosion performance of the hollow beam increases. The anti-explosion performance of hollow beam is basically the same at the same tension control stress level, even if there are different levels of stress loss. The improvement of concrete strength on the anti-explosion performance is not significant. The increase of the reinforcement ratio improves the anti-explosion performance of hollow beam slightly within a certain range. With the increase of the spacing of stirrups, the anti-explosion performance of the component weakens obviously.
Numerical analysis was carried out to research the damage situations of prestressed reinforced concrete hollow beams under the synergistic effects of blast and fragments. Finite element software ANSYS/LS-DYNA was used to simulate the blast test of the prestressed concrete panel and the experiment of explosive driving prefabricated fragments.The reliability of the material constitutive models and technical route used in this paper was verified. The differences in the dynamic response of the hollow beam under the influences of blast wave, fragment load and both of them were analyzed. At the same time, parametric studies were carried out to investigate the effects of tensile control stress, level of stress loss, concrete strength, reinforcement ratio, and spacing of stirrups on dynamic response of the prestressed concrete hollow beam. The results show that with the increase of tensile control stress, the anti-explosion performance of the hollow beam increases. The anti-explosion performance of hollow beam is basically the same at the same tension control stress level, even if there are different levels of stress loss. The improvement of concrete strength on the anti-explosion performance is not significant. The increase of the reinforcement ratio improves the anti-explosion performance of hollow beam slightly within a certain range. With the increase of the spacing of stirrups, the anti-explosion performance of the component weakens obviously.
引文
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[16]王有志.预应力混凝土结构[M].北京:中国水利水电出版社,1998:25-26.WANG Youzhi.Prestressed concrete structure[M].Beijing:China Water Conservancy and Hydropower Press,1998:25-26.
[2]CHOI J H,CHOI S J,CHO C M,et al.Experimental evaluation of Bi-directionally unbonded prestressed concrete panel blast resistance behavior under blast loading scenario[J].Journal of the Korea Concrete Institute,2016,28(6):673-683.
[3]CHEN Wensu,HAO Hong,CHEN Shuyang.Numerical analysis of prestressed reinforced concrete beam subjected to blast loading[J].Materials and Design,2015,65:662-674.
[4]刘超.预应力混凝土桥粱爆炸荷载作用效应研究[D].武汉:武汉理工大学交通学院,2012:77-97.LIU Chao.The study of the effects of blast loading on prestressed concrete bridge[D].Wuhan:Wuhan University of Technology.College of Transportation,2012:77-97.
[5]夏小虎.预应力钢筋混凝土梁在爆轰条件下的动力行为研究[D].武汉:武汉理工大学土木工程与建筑学院,2012:31-43.XIA Xiaohu.Dynamic behavior of prestressed reinforced concrete beam under detonation condition[D].Wuhan:Wuhan University of Technology.College of Civil Engineering and Architecture,2012:31-43.
[6]田力,朱运华.冲击波和破片联合作用下RC柱的损伤分析[J].建筑科学与工程学报,2017,34(2):64-70.TIAN Li,ZHU Yunhua.Damage analysis of RC column under combined action of shock wave and fragments[J].Journal of Building Science and Engineering,2017,34(2):64-70.
[7]田力,张浩.冲击波和预制破片复合作用下H型钢柱损伤效应分析[J].同济大学学报(自然科学版),2018,46(3):289-299.TIAN Li,ZHANG Hao.Damage effects analysis of H-section steel column subjected to synergistic effects of blast and fragments[J].Journal of Tongji University(Natural Science),2018,46(3):289-299.
[8]DAVID G,WINGET P E,ASCE M,et al.Analysis and design of critical bridges subjected to blast loads[J].Journal of Structural Engineering,2005,131(8):1243-1255.
[9]CHUNG KIM YUEN S,LANGDON G S,NURICK GN,et al.Response of V-shape plates to localized blast load Experiments and numerical simulation[J].International Journal of Impact Engineering,2012,46:97-109.
[10]田力,朱聪,王浩,等.碰撞冲击荷载作用下钢筋混凝土柱的动态响应及破坏模式[J].工程力学,2013,30(2):150-155.TIAN Li,ZHU Cong,WANG Hao,et al.Dynamic response and failure mode of reinforced concrete columns under impact loading[J].Engineering Mechanics,2013,30(2):150-155.
[11]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007:487-489.WANG Xinmin.ANSYS engineering structure numerical analysis[M].Beijing:China Communications Press,2007:487-489.
[12]张威,肖正明,伍星,等.基于动力松弛法的齿轮系统动态接触仿真分析[J].机械传动,2015,39(10):108-113.ZHANG Wei,XIAO Zhengming,WU Xing,et al.Simulation analysis of dynamic contact of gear system based on dynamic relaxation method[J].Mechanical Transmission,2015,39(10):108-113.
[13]师燕超.爆炸荷载作用下钢筋混凝土结构的动态响应行为与损伤破坏机理[D].天津:天津大学建筑工程学院,2009:61-63.SHI Yanchao.Dynamic response behavior and damage mechanism of reinforced concrete structures under explosive load[D].Tianjin:Tianjin University.School of Civil Engineering,2009:61-63.
[14]段新峰,呈远胜,张攀,等.爆炸波和破片复合作用下I型夹层板毁伤仿真[J].中国舰船研究,2015,10(6):45-69.DAUN Xinfeng,CHENG Yuansheng,ZHANG Pan,et al.Damage simulation of Type I sandwich plate under shock wave and fragment joint action[J].Journal of Ship Research,2015,10(6):45-69.
[15]印立魁,蒋建伟,门建兵,等.立方体预制破片战斗部破片初速计算模型[J].兵工学报,2014,35(12):1967-1971.YIN Likui,JIANG Jianwei,MEN Jianbing,et al.Velocity calculation model of cubic prefabricated warhead fragment[J].Journal of Ordnance,2014,35(12):1967-1971.
[16]王有志.预应力混凝土结构[M].北京:中国水利水电出版社,1998:25-26.WANG Youzhi.Prestressed concrete structure[M].Beijing:China Water Conservancy and Hydropower Press,1998:25-26.