冲击荷载下钢筋混凝土梁抗冲击性能研究进展

Research Review on Impact Resistance of Reinforced Concrete Beams Under Impact Loads

针对冲击荷载下钢筋混凝土梁抗冲击性能研究广泛并取得许多有价值成果的研究现状,对国内外众多学者基于试验、数值与理论等方法开展的大量工作与研究成果进行综述,包括冲击荷载的研究、材料的应变率效应、钢筋混凝土梁的动态响应与破坏机制、设计评估方法;根据钢筋混凝土梁破坏规律与特点,对破坏模式进行归纳总结,并提出基于承载力的破坏模式判别准则;指出未来钢筋混凝土梁抗冲击研究重点应包括冲击荷载的计算、钢筋混凝土梁破坏判别与简化响应计算。

Aiming at the status of research on impact resistance of reinforced concrete beams under impact loads,extensive research and many valuable achievements having been made,a large amount of work and research results based on experimental,numerical,and theoretical methods carried out by many scholars at home and abroad were summarized,including the research on impact loads,strain rate effect of materials,as well as dynamic response,failure mechanism,and design assessment methods of reinforced concrete beams.According to the failure law and characteristics of reinforced concrete beams,the failure modes were summarized,and the criterion of failure mode discrimination based on bearing c apacity was proposed.The future research emphasis for impact resistance of reinforced concrete beams was pointed out to be the calculation of impact loads,failure discrimination of reinforced concrete beams,and simplified response calculation.