Sponsor(s): China Association for Disaster Prevention; Institute of Engineering Mechanics, CEA
6 issues per year
Current Issue: Issue 05, 2019
Journal of Natural Disasters, started in 1992, publishes papers on disaster prediction and prevention, disaster risk assessment, disaster mitigation for agriculture, meteorology and city, disaster mitigation policy and management system. It also focuses on social factors of natural disasters, loss prediction of earthquake all over the world, awareness improvement on disaster prevention, the system engineering on disaster prevention and mitigation, and so on.
Ou Jinping, Li Youshan, Shi Peijun, Han Linhai, Xiao Yan, Zhou Xianyan, Cui Jie
Ma Zongjin, Ma Zhiliang, Wang Lanmin, Wang Zifa, Wang Chunyi, Wang Zhenqing, Shan Chunchang, Shi Peijun, Fu Qiang, Lv D
Research on the overturning stability of the single-pillar ramp bridge under the conditions of accident vehicle rescue
Journal of Natural Disasters,2019,Vol 28,No. 05
When the heavy vehicle accident appears on the single-pillar ramp bridge, the rescue condition of the crane often leads to the risk of overturning to the ramp bridge. For the straight and curved ramp bridges, five working conditions of anti-overturning analysis are determined considering two typical cranes rescue two common heavy vehicles. Three contents of anti-overturning stability analysis of ramp bridges are proposed, namely bridge bearing disengaging, anti-overturning stability coefficient, and local bearing capacity of bridge decks. The calculation results show the following: (1) The risk of bearing disengaging to the curved bridge in the rescue process is larger than that to the straight bridge, and the risk of bearing disengaging when the crane running close to the accident vehicle is greater than that when the crane lifting the accident vehicle; (2) for the purpose of reducing the risk of bearing disengaging, the crane should be driven in the vicinity of the center line; if the accident vehicle is on the centrifugal side of the curve ramp bridge, the crane should be driven on the centripetal side; (3) under normal circumstances, the anti-overturning stability coefficient of the ramp bridge while the crane rescuing heavy vehicles can meet the requirements of Chinese bridge codes, and the heavier accident vehicle can result in greater overturning risk in rescue process; (4) when the crane lifts the accident vehicle, the local bearing capacity of the bridge deck may be insufficient. We can reduce the possible damage to the deck by adjusting the positions of the crane legs, increasing the size of the leg pads, and speeding up the rescue process.