![]() ![]() ![]() The long-term effects on the use of the bridge weren’t immediately clear. His appointment is the latest promotion in a military career that began in 1983 but has also led him to be sanctioned this year by the European Union. He has commanded several motorized rifle divisions and was instrumental in Russia’s operations in Syria, and while there, was awarded the title of Hero of the Russian Federation. The new commander, General Sergey Surovikin, first saw service in Afghanistan before commanding a unit in the second Chechen war. Putin ordered a “government commission” to examine the Kerch bridge “emergency” in Crimea, Russian state media TASS reported.Īlso on Saturday, the Russian Defense Ministry announced the appointment of a new commander for what it calls its special military operation in Ukraine, according to Russian state media. A subsequent fire engulfed a train of fuel tanks on a separate, adjacent rail portion of the bridge. Russian officials said a truck exploded, causing Crimea-bound sections of the bridge’s roadway to fall. The exact cause of the blast at Europe’s longest bridge is yet to be confirmed. At least three people were killed in the explosion, Russian officials said, citing preliminary information. The blast collapsed part of the roadway on the Kerch Strait road-and-rail bridge – opened by Putin himself in 2018 – images and video from the scene showed. Damage to the bridge is directly proportional to the explosive weight and inversely proportional to the standoff distance.In a major blow for Russian President Vladimir Putin, a huge explosion early Saturday severely damaged the only bridge connecting the annexed Crimean Peninsula with the Russian mainland, crimping a key supply route for Moscow’s faltering war in Ukraine. ![]() It has been found that the severe eccentric explosive loading on the deck other than at the supports is found detrimental and makes the bridge almost irreparable. Based on the computed results, the most critical location of the explosives is assessed. The load-carrying mechanism, stress profiles, and dynamic responses such as maximum displacement are discussed and compared. The blast load is modelled as a pressure function of the stand-off distance and the equivalent mass of TNT. The main parameters affecting the behavior of bridge under blast load above the surface are investigated such as explosive weight (W), the distance from the explosion source to bridge (S), and location of explosion. Johnson-Cook (J-C) damage model has been adopted to simulate the non-linear behavior of the steel. The objective of this study is to simulate the behavior of a bowstring steel girder bridge using the ABAQUS nonlinear finite element analysis software and investigate its response under air-blast loadings considering various detonation scenarios in terms of location and mass of the explosive charge. A few research papers addressing the dynamic behavior of steel bridges subjected to explosive loading are available in the literature. The safety performance of such structures under explosive loading during warfare and subversion too is of serious concern to researchers, engineers, and other government officials. Thus, steel bridges are also the part of infrastructural lifeline system of a country. Bridges are also quite commonly enquired in the Indian railway network for the railway tracks to cross over the nullas and rivers. Steel bridges are preferred for their lesser construction time and are used in territorial border areas, to develop road connectivity between neighboring countries, and also in the existing busy railway tracks to construct underpass and roads over bridges. ![]()
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