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应用分层Timoshenko梁的非线性动力有限元法,对爆炸作用下内衬钢板的钢筋混凝土梁的整体动力响应进行分析,探讨了不同加固钢板厚度、不同作用荷载峰值、不同纵向受拉钢筋配筋率以及不同配箍率对组合结构动力性能的影响,得到了爆炸作用下内衬钢板的钢筋混凝土梁的动力性能。研究表明,钢板的加固可以明显降低结构挠度,增强结构整体抗力,相对于普通钢筋混凝土梁,钢筋混凝土-钢板组合梁能够承受更大的荷载作用,在分析组合梁的整体动力响应时应充分考虑纵向受拉钢筋配筋率,特别是配箍率的影响。
The nonlinear dynamic finite element method of layered Timoshenko beam is used to analyze the overall dynamic response of the reinforced concrete beam lined with steel plate under explosion. The effects of different strengthened steel plate thickness, different peak loads, different longitudinal tensile reinforcement Rate and different stirrup ratio on the dynamic performance of the composite structures were obtained. The dynamic performance of reinforced concrete beams lined with steel plates under explosion was obtained. The results show that the steel plate reinforcement can significantly reduce the structural deflection and enhance the overall structural resistance. Compared with ordinary reinforced concrete beams, the reinforced concrete-steel composite beams can withstand greater loads, and the overall dynamic response of the composite beams should be fully considered Longitudinal tensile reinforcement steel reinforcement ratio, especially the effect of stirrup rate.