Experimental Study on Lateral Impact Resistance of Corrugated Steel Pipe

Due to its excellent bending stiffness, lightweight and high strength, and good deformation capability, corrugated steel pipes have been widely used in infrastructure, transportation engineering, and protective structures. With the frequent occurrence of natural disasters and accidents, the impact resistance of corrugated steel pipes under extreme loading has gradually become a research hotspot. To enhance the safety and reliability of corrugated steel pipes under impact loads, this paper systematically conducts experiments on their lateral impact resistance. Through falling hammer impact tests, the effects of different impact energies and hammer head shapes on the deformation patterns and failure mechanisms of corrugated steel pipes are investigated. The time-history curves of impact force and displacement during the impact process are measured experimentally. The mechanical response characteristics of corrugated steel pipes under lateral impact are analyzed. The experimental results show that corrugated steel pipes still possess strong energy absorption capabilities at higher impact energies. Their unique corrugated structure effectively disperses impact loads, reduces local stress concentration, and thereby lowers the risk of structural failure.