超高性能钢筋混凝土与普通钢筋混凝土柱结构抗爆性能的比较研究

摘要

运用显式有限元动力分析软件 LS-DYNA,建立了典型钢筋混凝土柱的三维有限元模型。该模型采用了钢筋混凝土的分离式建模,不考虑两者之间的粘结滑移而考虑混凝土材料的应变率效应。在有限元模型的基础上,通过对比超高性能钢筋混凝土柱与普通钢筋混凝土柱结构在爆炸荷载作用下的动力响应,研究了超高性能混凝土柱结构的抗爆性能。研究结果表明,与普通钢筋混凝土柱结构相比较,超高性能钢筋混凝土柱结构的抗爆性能有十分显著的提高。%A 3-D finite element model for typical reinforced concrete columns is established by using explicit finite element dynamic analysis software LS -DYNA. The model uses a separate modeling of reinforced concrete which only considers the concrete the strain rate effect. Based on the finite element model, the difference of the dynamic responses between UHPC steel column and ordinary reinforced concrete column is compared under the action of the blast loading. The results show that the antiknock performance of UHPC steel column structures has a very significant increase comparing with that of the ordinary reinforced concrete column structure.