叠合板式混凝土墙不同接头形式抗爆性能分析

Analysis on Explosion-resistant Performance of Different Joints Form for Laminated RC Panel Wall

叠合板式钢筋混凝土墙应用已经比较广泛,但其接头方式对结构抗爆性能的影响还未不清楚。运用数值模拟的方法对3种不同接头方式下桁架式叠合板式钢筋混凝土墙的抗爆性能进行研究,计算了3种荷载条件下结构的动力响应,分析了结构中钢筋应变时程变化特征以及整体挠度和裂纹扩展演化规律,结果表明装配整体式连接接头形式抗爆性能最好。在接头局部,试件侧墙与底板接头设置在距根部300 mm处的抗爆性能优于接头设在根部附近的。但就整体变形而言,接头设在根部附近的试件抗爆性能要优于接头设在距根部300 mm处的。数值模拟结果与试验结果对叠合板式混凝土墙接头形式优选具有一定的参考价值。

The laminated RC panel wall was used widely, while the influence of joint forms on explosion-resistant performance of structure was not explicitly studied. In this study, the explosion-resistant performances of truss-type laminated RC panel walls of three different joints were analyzed with numerical simulation,respectively. The dynamic responses of the structure under three loading conditions were calculated, and the steel stress and strain variation characteristic,overall deflection and eracks evolution rules were discussed. Results show that the integral assembled joint form was of the highest explosion-resistant performance. In locality of joint,the explosion-resistant performance of sidewall and bottom plate set at 300 mm to the foot was higher than that near the foot. However,as for the overall deformation, the conclusion was just on the reverse.