爆炸荷载下预应力T型梁毁伤效应数值仿真分析  

Numerical Simulation and Experimental Study on Damage Effect of Prestressed T-shaped Beam under Blast Load

作　　者：张见升 景建斌 孙浩 王西泉 李波 ZHANG Jiansheng;JING Jianbin;SUN Hao;WANG Xiquan;LI Bo(Test and Measuring Academy of Norinco Group,Huayin 714200,Shaanxi,China)

机构地区：[1]中国兵器工业试验测试研究院,陕西华阴714200

出　　处：《兵工学报》2024年第S02期193-198,共6页Acta Armamentarii

摘　　要：针对爆炸荷载下预应力T型梁结构毁伤效应问题,采用非线性有限元软件建立了1∶3复杂预应力T型梁钢混结构有限元模型,设计了钢筋梁单元与实体混凝土单元之间的网格尺寸匹配与协调性,预应力钢绞线、梁肋钢筋、翼缘板钢筋、横隔梁钢筋之间的耦合性,并采用降温预应力筋收缩法,灵活控制了预应力与T梁单元之间量值传递的准确加载,并对有限元仿真结果与试验结果进行比较,结果表明:数值仿真与试验毁伤情况基本吻合;相同位置处冲击波超压仿真值与试验测试值相对误差不超过20%,验证了数值仿真模型的有效性。可为后续钢混框架结构易损性分析和抗爆性能设计提供仿真方法和数据支撑。The damage effect of prestressed T-shaped beam under blast load is studied.A 1∶3 complex steel-concrete structure finite element model of prestressed T-shaped beam is established by using nonlinear finite element software.The mesh size matching and coordination between reinforced beam elements and solid concrete elements are designed,along with the coupling among the prestressed steel strand,beam rib reinforcement,edge plate reinforcement and cross-beam reinforcement.Then cooling prestressed contraction method are used to flexibly control the accurate loading of value transfer between prestressed and T-shaped beam elements.The finite element simulation results are compered with the experimental results.The comparison result indicates that the numericial simulation and experimental damage situations are basically consistent,and at the same position,the relative error between the simulated value of shock wave overpressure and the test value is less than 20%,which verifies the effectiveness of the numerical simulation model.It can provide the simulation methods and data support for the vulnerability analysis and explosion resistance design of subsequent steel-concrete frame structures.

关 键 词：爆炸荷载 预应力T型梁 降温预应力筋收缩法 数值仿真 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程]