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在前期研究的刚柔复合防护结构体系的基础上,针对钢筋混凝土复合防护梁的抗撞性能进行了分析研究,重点在于探讨梁端约束条件可能对防护效果产生的影响.在数值模拟的过程中,分别考虑了无防护、刚性防护、柔性防护和阵列式刚柔复合防护四种不同的措施以及两端固支、两端铰支和一端固支一端铰支三种不同的梁端约束形式.通过观测钢筋混凝土梁的应变、位移、加速度、冲击力等参数,对比分析不同防护装置的抗撞效果.数值结果表明,在相同的冲击条件下,尽管复合防护的效果最优,但梁的约束形式仍对动力反应峰值的抑制效果有显著影响,其中又以两端固支梁的防护效果为最好.
On the basis of the rigid-flexible composite protective structure of the previous study, the research on the anti-collision performance of reinforced concrete composite protective beams is focused on the possible influence of the constraint of beam end on the protective effect.In the process of numerical simulation , Respectively considering four different measures of non-protection, rigid protection, flexible protection and array rigid and flexible composite protection, and three different beam end restraining forms of two-end fixed support, two-end hinged support and one end fixed support hinged support. By observing the parameters of strain, displacement, acceleration and impact of reinforced concrete beam, the anti-collision effect of different guards is compared and analyzed.The numerical results show that under the same impact conditions, although the effect of composite protection is the best, Form still has a significant effect on the inhibitory effect of peak dynamic response, of which the protective effect of the two ends of the beam is the best.