Research on impact load characteristics of high arch dams subjected to underwater explosions
Determination of blast loads is the prerequisite for the blast performance assessment and blast-resistant design of high arch dams.For this purpose,model tests of high arch dams subjected to underwater explosions were carried out to study the characteristics of underwater explosion impact loads combined with numerical simulation methods.A prototype arch dam was designed and modelled at a scale of 1∶200,and the impact loads in the reser-voir and on the surface of the arch dam subjected to the underwater explosion were measured.Abaqus software was used for numerical simulation,which was validated by comparing with the test data.The results indicate that the un-derwater explosion impact load of high arch dams can be divided into three parts:the primary impact load,the bank slope reflection impact load,and the base reflection impact load;Under the condition of detonation in the middle of the reservoir,the central area of the high arch dam is greatly affected by the primary wave impact,while areas near the bank slope and the base are greatly affected by the reflected wave.In the anti explosion design and performance evaluation of high arch dams,the reflected impact load should be considered.The research results can provide refer-ence for the anti-explosion design and performance evaluation of high arch dams.
high arch damsunderwater explosionimpact load on dam surfacereflected wavemodel test
万方数据
维普
