爆炸荷载作用下箍筋加密RC简支梁抗爆性能分析  

Analysis of Anti-explosion Performance of Simply Supported RC Beams with Stirrups under Explosive Load

作　　者：刘胤彤 Liu Yin-tong

机构地区：[1]中铁十九局集团第一工程有限公司,辽宁辽阳111000

出　　处：《建筑技术开发》2019年第5期132-133,共2页Building Technology Development

摘　　要：基于有限元分析软件LS-DYNA数值模拟了爆炸荷载作用下箍筋加密前后RC简支梁的损伤破坏,分析了剪跨区和全梁箍筋加密对RC简支梁抗爆性能的影响。研究表明:剪跨区箍筋加密能有效减少梁中裂纹水平,但跨中挠度峰值和钢筋轴向应力较加密前均没有明显变化,全梁箍筋加密较剪跨区箍筋加密对梁抗爆性能提高较多。验证了数值模拟研究RC梁抗爆性能的可行性,对建筑结构抗爆设计具有一定的指导意义。Based on the finite element analysis software LS-DYNA,the damage and damage of RC simple-supported beams before and after stirrup infiltration under explosive load are numerically simulated,and the effects of shear span area and stirrup infiltration on the explosion resistance of RC simple-supported beams are analyzed.The results show that the crack level in the beam can be effectively reduced by the stirrup encryption in the shear span area,but the peak defiection and the axial stress of the steel bars in the middle of the span have no obvious change compared with before the stirrup encryption in the shear span area,and the anti-explosion performance of the beam is improved more by the stirrup encryption in the whole beam than by the stirrup encryption in the shear span area.This paper verifies the feasibility of numerical simulation to study the anti-explosion performance of RC beams,which has a certain guiding significance for the anti-explosion design of building structures.

关 键 词：RC梁 箍筋加密 裂纹水平 抗爆性能 

分 类 号：TU74[建筑科学—建筑技术科学] TV54.5[水利工程—水利水电工程]