Abstract This paper proposes a novel reinforced concrete (RC) frame structure encased with shaped steel to resist the debris flow impact. The corresponding comparative experimental studies of two test models under the impact of debris flow are designed and performed, one of which is a traditional RC frame structure (TRCFS) and the other is a novel RC frame structure encased with shaped steel (NRCFS). After a series of impact loading tests, the impact resistance to debris flow of the novel RC frame structure is investigated and the comparison is made. Throughout the impact test, obvious bending failure appears on the impacted column of the traditional RC frame structure and the damage develops fast, showing its weak impact resistance. However, much less damage is found on the novel structure’s column. Additionally, the novel RC frame structure (NRCFS) performs better in force transmission mechanism than traditional one does, leading to the larger stiffness and stronger capabilities in resisting impact loads. Furthermore, the experimental and numerical results are in good agreement, which validates the rationality and accuracy of the debris flow impact test and the feasibility of the novel structural system against the debris flow impact. As a result, it can be proved in this impact loading test that novel RC frame structure encased with shaped steel has excellent impact resistance to debris flow.

中文翻译：

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新型钢筋混凝土框架结构在泥石流冲击下的性能试验与数值研究

摘要 本文提出了一种新型钢筋混凝土（RC）框架结构，用型钢包裹，以抵抗泥石流的冲击。设计并进行了泥石流冲击下两种试验模型的相应对比试验研究，一种是传统的钢筋混凝土框架结构（TRCFS），另一种是新型的型钢包覆钢筋混凝土框架结构（NRCFS）。经过一系列的冲击载荷试验，研究了新型钢筋混凝土框架结构的抗泥石流冲击性能并进行了比较。在整个冲击试验过程中，传统RC框架结构的受冲击柱出现明显的弯曲破坏，损伤发展较快，表明其抗冲击能力较弱。然而，在新型结构的柱子上发现的损坏要少得多。此外，新型RC框架结构（NRCFS）在传力机构上的性能优于传统结构，从而具有更大的刚度和更强的抗冲击载荷能力。此外，实验与数值结果吻合较好，验证了泥石流冲击试验的合理性和准确性，验证了新型结构体系抗泥石流冲击的可行性。因此，在本次冲击载荷试验中可以证明，新型钢筋混凝土框架结构包覆型钢具有优异的抗泥石流冲击能力。验证了泥石流冲击试验的合理性和准确性，验证了新型结构体系抗泥石流冲击的可行性。因此，在本次冲击载荷试验中可以证明，新型钢筋混凝土框架结构包覆型钢具有优异的抗泥石流冲击能力。验证了泥石流冲击试验的合理性和准确性，验证了新型结构体系抗泥石流冲击的可行性。因此，在本次冲击载荷试验中可以证明，新型钢筋混凝土框架结构包覆型钢具有优异的抗泥石流冲击能力。