Research On The Impact Of Mountain Rolling Stone On The Pier And Its Reinforcement

The rolling stones is a very significant natural disaster,it often happens with the rainy season and in the mountains,which is high risk,especially in the western mountainous area.Since along with China’s western development,western region economy continues to improve,traffic improvement,highways,railways and bridges are also gradually to cover more remote mountainous areas,become bridge traffic infrastructure construction can not be replaced.However,the sudden outbreak of mountain rolling stones,short duration,rapid movement,especially for the bridge pier is extremely destructive,so the bridge pier of the bridge response analysis is very necessary.Through the research on the dynamic performance of the bridge pier after being impacted by the rolling stones,the protection and reinforcement measures of the bridge pier in the mountain area are discussed.So the bridge pier can better resist the impact of the rolling stones,and has a certain guiding role in the maintenance of the bridge.Based on the study of the impact of the rolling stones on the piers at home and abroad,this paper focuses on the analysis of the mechanical behavior and influencing factors.First of all,the paper introduces the theoretical research on the impact of the rolling stones on the pier.After that,combined with the practical engineering background,a numerical model of a simple supported beam bridge in mountain area of Western China is established by the explicit dynamics software ANSYS/LS-DYNA,and then the impact of different initial kinetic energy,the different forms of piers,the different strength grades of concrete and the dynamic response of the piers under the impact of the rolling stones are compared and analyzed.At last,study the mechanical properties of aluminum alloy foam material,steel plate and aluminum foam sandwich structure and some suggestions are put forward to strengthen and protect the pier.